refactor: migrate queue_tab cover resolver to shared service, add supporter

Previously filter/sort headers in All, Albums, and Singles tabs
were hidden when queue items existed, preventing users from
filtering their library (e.g. find MP3 tracks to re-download
as FLAC) during active downloads.

.github/FUNDING.yml

@@ -1,4 +1,3 @@
 github: zarzet
 ko_fi: zarzet
-buy_me_a_coffee: zarzet
 

CHANGELOG.md

@@ -1,5 +1,143 @@
 # Changelog
 
+## [3.6.5] - 2026-02-10
+
+### Highlights
+
+- **Audio Format Conversion**: Convert between FLAC, MP3, and Opus directly from Track Metadata screen with full metadata and cover art preservation
+- **PC v7.0.8 Backend Merge**: Adopts several Go backend improvements from SpotiFLAC PC v7.0.8 including Amazon encrypted stream support, SpotFetch metadata fallback, and Qobuz API update
+- **Amazon Music Re-enabled**: Amazon provider back in service with new API
+
+### Added
+
+- "Use Primary Artist Only" setting: strips featured artists from folder names (e.g. "Justin Bieber, Quavo" becomes "Justin Bieber") for cleaner folder organization
+  - Supports separators: `, ` `;` `&` `feat.` `ft.` `featuring` `with` `x`
+  - Available in Settings > Download > below "Use Album Artist for folders"
+- Audio format conversion from Track Metadata screen
+  - Convert between FLAC, MP3, and Opus formats (any direction)
+  - Selectable bitrate: 128k, 192k, 256k, 320k
+  - Full metadata and cover art preservation during conversion
+  - Confirmation dialog before converting (original file deleted after)
+  - SAF storage support: copies to temp, converts, writes back via SAF
+  - Download history automatically updated with new file path
+- Unified download request contract (`DownloadRequestPayload`) for all providers/flows
+  - Includes full superset fields: lyrics mode, genre/label/copyright, provider IDs, SAF params, cover/quality settings
+  - Added strategy flags in payload: `use_extensions`, `use_fallback`
+- New Go unified router entrypoint: `DownloadByStrategy(requestJSON)`
+  - Routing priority: YouTube service -> extension fallback -> built-in fallback -> direct service
+- New Android method channel handler: `"downloadByStrategy"` -> `Gobackend.downloadByStrategy(...)`
+- SpotFetch metadata fallback integration for Spotify-blocked regions
+  - New backend client for `spotify.afkarxyz.fun/api`
+  - Automatic fallback in Spotify metadata fetch path when primary source fails
+- Lyrics extraction now supports MP3 (ID3v2) and Opus/OGG (Vorbis comments) in addition to FLAC
+  - Includes heuristic detection of lyrics stored in Comment fields
+- Edit Metadata now supports manual cover selection (pick/replace cover image) and embeds it into audio tags on save
+- Save Lyrics now shows an immediate in-progress snackbar (`Saving lyrics...`) so users know the operation has started
+
+### Changed
+
+- Merged several Go backend improvements from SpotiFLAC PC v7.0.8: Amazon new API with encrypted stream/decryption support, SpotFetch metadata fallback for Spotify-blocked regions, multi-format lyrics extraction (MP3/Opus/OGG), Qobuz Jumo API update.
+- Download queue execution now builds one payload and uses a single bridge entrypoint (`PlatformBridge.downloadByStrategy`) instead of branching into multiple bridge methods
+- Dart `downloadByStrategy` now sends a single request to Go (`downloadByStrategy` channel); routing concern is centralized in Go backend
+- Legacy Dart bridge methods (`downloadTrack`, `downloadWithFallback`, `downloadWithExtensions`, `downloadFromYouTube`) are now thin wrappers and marked `@Deprecated`
+- Qobuz downloader updated to latest Jumo API contract (`/get` endpoint, required headers)
+- Amazon download flow now returns `decryption_key` from Go and performs decryption in Flutter (local file + SAF paths)
+- Amazon now uses the new `amazon.afkarxyz.fun` API flow (ASIN-based track endpoint + legacy fallback) with encrypted stream support
+- Amazon ASIN extraction rewritten with robust URL/query-param parsing and regex fallback
+- Amazon provider re-enabled in download service picker and download settings (alongside Tidal, Qobuz, and YouTube picker flow)
+- Track Metadata cover UI now refreshes from the embedded file after Edit Metadata/Re-enrich, so the displayed art matches actual file tags
+- Edit Metadata cover section moved to the top of the form and now previews current embedded cover before replacement (plus selected replacement preview)
+- Edit Metadata cover preview enlarged (120px to 160px) with shadow, side-by-side layout for current vs selected cover, and label repositioned below image
+
+### Fixed
+
+- Fixed lyrics mode "External .LRC" still embedding lyrics into metadata - `lyrics_mode` was not being sent to Go backend for single-service downloads and YouTube provider, causing Go to default to "embed"
+- Fixed `flutter_local_notifications` v20 breaking changes - migrated all `initialize()`, `show()`, and `cancel()` calls from positional parameters to named parameters
+- Fixed SAF duplicate folder bug: concurrent batch downloads creating empty folders with `(1)`, `(2)`, `(3)` suffixes - added synchronized lock to `ensureDocumentDir` in Kotlin with duplicate detection and cleanup
+- Track Metadata lyrics section now hides "Embed Lyrics" when lyrics are already embedded in file, preventing redundant embed attempts
+- Fixed lyrics embed path to support FLAC/MP3/Opus consistently (including SAF files) without forcing unsupported parser paths
+- Inconsistent parameter parity across download paths
+  - `downloadWithExtensions` now carries `copyright`
+  - YouTube path now carries `embed_max_quality_cover` and metadata parity fields
+- Inconsistent success response metadata between direct/fallback flows
+  - Added shared Go response builder for `DownloadTrack` and `DownloadWithFallback`
+  - Success responses now consistently include `genre`, `label`, `copyright`, and `lyrics_lrc`
+- YouTube success response now also includes extended metadata fields (`cover_url`, `genre`, `label`, `copyright`) for parity with other providers
+- Fixed `Save Lyrics` crash on Android (`java.lang.Integer cannot be cast to java.lang.Long`) by normalizing `duration_ms` channel argument as `Number -> Long`
+- Fixed FLAC Re-enrich cover edge case where metadata could be written without cover when temp cover file creation failed; FLAC cover embed now uses in-memory bytes and verifies cover after write
+- Fixed FLAC picture-block embed robustness by detecting image MIME via magic bytes (JPEG/PNG/GIF/WEBP) instead of relying on filename extension
+- Fixed MP3/Opus metadata rewrite flows to preserve existing embedded cover when no new cover is available
+- Fixed Library tab cover not updating after manual cover edit/re-embed for downloaded tracks
+  - Queue/Library now prefers embedded cover art extracted from local files (not just cached `coverUrl`)
+  - Added per-track extraction cache with file-modification invalidation so updated embedded art is reflected in Library
+  - Extraction is now on-demand for edited tracks only (not full-library reload)
+  - Returning from Track Metadata now refreshes cover cache only for the affected track
+  - Cover refresh is now skipped when file modification time is unchanged, removing unnecessary flash when simply opening/closing metadata screen
+- Fixed repeated cover preview extraction in Track Metadata screen (`track_cover_preview_*`) causing visible flash when reopening
+  - Added in-memory preview cache keyed by file path so reopening metadata reuses existing preview without re-extract
+  - Cache validation uses file modification time for filesystem paths; SAF paths are refreshed only after successful edit actions
+  - Queue/Library now also compares SAF file last-modified (`getSafFileModTimes`) before refreshing embedded-cover cache
+  - Preview cache key is now stable per track item (not volatile temp SAF path), eliminating false cache misses on SAF-backed files
+  - Track Metadata no longer auto-extracts cover preview on every screen open; extraction now runs only after actual edit/re-enrich changes (or when explicitly forced)
+- Track metadata edits/re-enrich now sync updated tags back into `downloadHistoryProvider` + SQLite history rows
+  - Non-Library screens that read download history (Home/album/history views) now reflect updated title/artist/album/tags without manual rescan
+  - Track Metadata back-navigation now returns an explicit update result after successful edits/re-enrich, enabling History-tab cover refresh fallback when SAF timestamps are unreliable
+
+### Performance
+
+- Configured Flutter image cache limits (240 entries / 60 MiB) and added `ResizeImage` wrappers for cover art precaching across all screens, reducing peak memory usage on cover-heavy pages
+- Added LRU eviction to Deezer cache with configurable max entries per cache type (search/album/artist/ISRC) and periodic expired-entry cleanup to prevent unbounded memory growth in long sessions
+- Download progress notifications are now normalized (2-decimal progress, 1-decimal speed, 0.1 MiB byte steps) and deduplicated by track/artist/percent/queue-count, reducing notification overhead during batch downloads
+- Each queue item now uses a dedicated `ConsumerWidget` with per-item `.select()` instead of rebuilding the entire list on any item change; items are wrapped in `RepaintBoundary` for paint isolation
+- Queue/Library search indexes are now built on-demand per item instead of upfront for all items, with bounded LRU caches (max 4000 entries)
+- `copyWith` now preserves derived lookup indexes (ISRC map, track key set) when items list is unchanged, avoiding O(n) rebuild on every scan progress update
+- Scan progress polling now compares values before calling `setState`, skipping unnecessary widget rebuilds when nothing changed
+- Added in-flight flag to download progress and library scan polling to prevent concurrent timer callbacks from overlapping
+- New `DownloadedEmbeddedCoverResolver` service replaces per-screen cover extraction logic with a shared bounded cache (160 entries), mod-time validation, and throttled refresh checks
+- Multiple embedded cover change callbacks are now coalesced into a single frame via `addPostFrameCallback`, preventing redundant rebuilds
+- Downloaded album screen now caches filtered/sorted track lists and reuses them when the source data reference is unchanged
+- Home tab recent downloads now use single-pass aggregation instead of building full per-album lists, and store only IDs instead of full item objects for the clear-all action
+- Removed duplicate `_downloadedSpotifyIds` Set and `_isrcSet` (both now use existing map lookups), removed unused `_isTyping` state in home tab
+- Track cache pre-warming is now capped at 80 tracks per request to avoid excessive backend calls on large playlists
+- About page contributor avatars now use `memCacheWidth`/`memCacheHeight` to decode at display size instead of full resolution
+- Orphaned download cleanup now checks file existence in parallel (chunk 16) instead of sequentially
+- Local library `findByTrackAndArtist` now uses O(1) map lookup (`_byTrackKey`) instead of O(n) linear scan
+- Local library database load and SharedPreferences fetch now run in parallel
+- Legacy mod-time backfill now uses chunked parallel `File.stat` (chunk 24) with per-chunk cancel check
+- Downloaded album screen now caches disc grouping, sorted disc numbers, common quality, and embedded cover path with reference-identity invalidation
+- Local album screen common quality is now computed once during cache rebuild instead of per-build
+- Batch delete in album screens now uses O(1) map lookup (`tracksById`) instead of `.where().firstOrNull`
+- Cache management page now fires all async init calls in parallel and uses chunked async directory deletion (chunk 24)
+- Cover resolver preview file existence check is now throttled (2.2s interval) to reduce synchronous I/O in build path
+- History and library database DELETE operations are now chunked (500 per batch) to stay within SQLite variable limits
+- Library database `cleanupMissingFiles` now checks file existence in parallel (chunk 16) and deletes in batched SQL
+
+### Security
+
+- All logs (Go and Dart) now automatically redact Bearer tokens, access/refresh tokens, client secrets, API keys, and passwords using regex-based sanitization before storage
+- Extension auth URLs are now validated for HTTPS-only, no embedded credentials, and no private/local network targets before opening
+- Auth URLs in logs are summarized to scheme+host+path only (query params stripped) to prevent token leakage; token exchange error bodies are truncated and sanitized
+- Extension HTTP requests now block URLs with embedded credentials (`user:pass@host`)
+- Extension storage files changed from `0644` to `0600` (owner-only read/write)
+- All SAF relative directory paths are now sanitized per-segment with `.`/`..` filtering; all user-provided file names pass through `sanitizeFilename()` before use
+- Extension ID is sanitized before building download destination path
+- Log export device info now shows Build ID and Security Patch level instead of masked Device ID
+
+### Technical
+
+- Centralized request serialization in `PlatformBridge` via shared invoke helper and unified payload model
+- Go strategy router normalizes incoming service casing before dispatch
+- Extension runtime: `customSearch` now passes query/options via VM globals instead of string interpolation, preventing parser edge cases on certain devices
+- Extension runtime: JS panic handler now logs full stack trace for easier debugging
+- `DownloadQueueLookup` expanded with `byItemId` map and `itemIds` list for O(1) queue item access from UI
+- Non-error/non-fatal log entries are now skipped entirely (not just hidden) when detailed logging is disabled, reducing buffer growth and Go log polling overhead
+
+### Removed
+
+- Buy Me a Coffee references removed from donate page, FUNDING.yml, README, and all localization files (account suspended)
+
+---
+
 ## [3.6.0] - 2026-02-09
 
 ### Highlights

README.md

@@ -1,5 +1,5 @@
 [![GitHub All Releases](https://img.shields.io/github/downloads/zarzet/SpotiFLAC-Mobile/total?style=for-the-badge&refresh=1)](https://github.com/zarzet/SpotiFLAC-Mobile/releases)
-[![VirusTotal](https://img.shields.io/badge/VirusTotal-Safe-brightgreen?style=for-the-badge&logo=virustotal)](https://www.virustotal.com/gui/file/dec9c96672ab80e6bf6b7a66786e612f5404446c341eb0311b4cc78fe10c96a1)
+[![VirusTotal](https://img.shields.io/badge/VirusTotal-Safe-brightgreen?style=for-the-badge&logo=virustotal)](https://www.virustotal.com/gui/file/40f8f1914287dea317122a837f98b0ddf7af3205adc2f84a350d767e0a6a345c)
 [![Crowdin](https://img.shields.io/badge/HELP%20TRANSLATE%20ON-CROWDIN-%2321252b?style=for-the-badge&logo=crowdin)](https://crowdin.com/project/spotiflac-mobile)
 
 <div align="center">
@@ -71,9 +71,9 @@ A: Some countries have restricted access to certain streaming service APIs. If d
 
 ### Want to support SpotiFLAC-Mobile?
 
-_If this software is useful and brings you value, consider supporting the project by buying me a coffee. Your support helps keep development going._
+_If this software is useful and brings you value, consider supporting the project. Your support helps keep development going._
 
-[![Ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/zarzet) <a href="https://www.buymeacoffee.com/zarzet" target="_blank"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee" style="height: 40px !important;width: 150px !important;" ></a>
+[![Ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/zarzet)
 
 
 ## Disclaimer

android/app/src/main/kotlin/com/zarz/spotiflac/MainActivity.kt

@@ -33,6 +33,7 @@ class MainActivity: FlutterFragmentActivity() {
     private val scope = CoroutineScope(SupervisorJob() + Dispatchers.Main)
     private var pendingSafTreeResult: MethodChannel.Result? = null
     private val safScanLock = Any()
+    private val safDirLock = Any()
     private var safScanProgress = SafScanProgress()
     @Volatile private var safScanCancel = false
     @Volatile private var safScanActive = false
@@ -299,27 +300,55 @@ class MainActivity: FlutterFragmentActivity() {
         return name.replace(Regex("[\\\\/:*?\"<>|]"), "_").trim()
     }
 
-    private fun ensureDocumentDir(treeUri: Uri, relativeDir: String): DocumentFile? {
+    private fun sanitizeRelativeDir(relativeDir: String): String {
-        var current = DocumentFile.fromTreeUri(this, treeUri) ?: return null
+        if (relativeDir.isBlank()) return ""
-        if (relativeDir.isBlank()) return current
+        return relativeDir
+            .split("/")
+            .map { sanitizeFilename(it) }
+            .filter { it.isNotBlank() && it != "." && it != ".." }
+            .joinToString("/")
+    }
 
-        val parts = relativeDir.split("/").filter { it.isNotBlank() }
+    private fun ensureDocumentDir(treeUri: Uri, relativeDir: String): DocumentFile? {
-        for (part in parts) {
+        val safeRelativeDir = sanitizeRelativeDir(relativeDir)
-            val existing = current.findFile(part)
+        if (safeRelativeDir.isBlank()) {
-            current = if (existing != null && existing.isDirectory) {
+            return DocumentFile.fromTreeUri(this, treeUri)
-                existing
+        }
-            } else {
+
-                current.createDirectory(part) ?: return null
+        // Synchronize to prevent concurrent downloads from creating duplicate
-            }
+        // directories with (1), (2) suffixes via SAF's auto-rename behavior.
+        synchronized(safDirLock) {
+            var current = DocumentFile.fromTreeUri(this, treeUri) ?: return null
+
+            val parts = safeRelativeDir.split("/").filter { it.isNotBlank() }
+            for (part in parts) {
+                val existing = current.findFile(part)
+                current = if (existing != null && existing.isDirectory) {
+                    existing
+                } else {
+                    val created = current.createDirectory(part) ?: return null
+                    // SAF may auto-rename to "part (1)" if another thread just created it.
+                    // Re-check: if the created name differs, delete it and use the original.
+                    val createdName = created.name ?: part
+                    if (createdName != part) {
+                        // Another thread won the race; delete the duplicate and use theirs.
+                        created.delete()
+                        current.findFile(part) ?: return null
+                    } else {
+                        created
+                    }
+                }
+            }
+            return current
         }
-        return current
     }
 
     private fun findDocumentDir(treeUri: Uri, relativeDir: String): DocumentFile? {
         var current = DocumentFile.fromTreeUri(this, treeUri) ?: return null
-        if (relativeDir.isBlank()) return current
+        val safeRelativeDir = sanitizeRelativeDir(relativeDir)
+        if (safeRelativeDir.isBlank()) return current
 
-        val parts = relativeDir.split("/").filter { it.isNotBlank() }
+        val parts = safeRelativeDir.split("/").filter { it.isNotBlank() }
         for (part in parts) {
             val existing = current.findFile(part)
             if (existing == null || !existing.isDirectory) return null
@@ -359,14 +388,21 @@ class MainActivity: FlutterFragmentActivity() {
             obj.put("relative_dir", "")
             return obj.toString()
         }
+        val safeRelativeDir = sanitizeRelativeDir(relativeDir)
+        val safeFileName = sanitizeFilename(fileName)
+        if (safeFileName.isBlank()) {
+            obj.put("uri", "")
+            obj.put("relative_dir", "")
+            return obj.toString()
+        }
 
         val treeUri = Uri.parse(treeUriStr)
-        val targetDir = findDocumentDir(treeUri, relativeDir)
+        val targetDir = findDocumentDir(treeUri, safeRelativeDir)
         if (targetDir != null) {
-            val direct = targetDir.findFile(fileName)
+            val direct = targetDir.findFile(safeFileName)
             if (direct != null && direct.isFile) {
                 obj.put("uri", direct.uri.toString())
-                obj.put("relative_dir", relativeDir)
+                obj.put("relative_dir", safeRelativeDir)
                 return obj.toString()
             }
         }
@@ -392,7 +428,7 @@ class MainActivity: FlutterFragmentActivity() {
                     val childPath = if (path.isBlank()) childName else "$path/$childName"
                     queue.add(child to childPath)
                 } else if (child.isFile) {
-                    if (child.name == fileName) {
+                    if (child.name == safeFileName) {
                         obj.put("uri", child.uri.toString())
                         obj.put("relative_dir", path)
                         return obj.toString()
@@ -408,7 +444,7 @@ class MainActivity: FlutterFragmentActivity() {
 
     private fun buildSafFileName(req: JSONObject, outputExt: String): String {
         val provided = req.optString("saf_file_name", "")
-        if (provided.isNotBlank()) return provided
+        if (provided.isNotBlank()) return sanitizeFilename(provided)
 
         val trackName = req.optString("track_name", "track")
         val artistName = req.optString("artist_name", "")
@@ -599,7 +635,7 @@ class MainActivity: FlutterFragmentActivity() {
         }
 
         val treeUri = Uri.parse(treeUriStr)
-        val relativeDir = req.optString("saf_relative_dir", "")
+        val relativeDir = sanitizeRelativeDir(req.optString("saf_relative_dir", ""))
         val outputExt = normalizeExt(req.optString("saf_output_ext", ""))
         val mimeType = mimeTypeForExt(outputExt)
         val fileName = buildSafFileName(req, outputExt)
@@ -1276,20 +1312,11 @@ class MainActivity: FlutterFragmentActivity() {
                             }
                             result.success(response)
                         }
-                        "downloadTrack" -> {
+                        "downloadByStrategy" -> {
                             val requestJson = call.arguments as String
                             val response = withContext(Dispatchers.IO) {
                                 handleSafDownload(requestJson) { json ->
-                                    Gobackend.downloadTrack(json)
+                                    Gobackend.downloadByStrategy(json)
-                                }
-                            }
-                            result.success(response)
-                        }
-                        "downloadWithFallback" -> {
-                            val requestJson = call.arguments as String
-                            val response = withContext(Dispatchers.IO) {
-                                handleSafDownload(requestJson) { json ->
-                                    Gobackend.downloadWithFallback(json)
                                 }
                             }
                             result.success(response)
@@ -1465,11 +1492,12 @@ class MainActivity: FlutterFragmentActivity() {
                         "safCreateFromPath" -> {
                             val treeUriStr = call.argument<String>("tree_uri") ?: ""
                             val relativeDir = call.argument<String>("relative_dir") ?: ""
-                            val fileName = call.argument<String>("file_name") ?: ""
+                            val fileName = sanitizeFilename(call.argument<String>("file_name") ?: "")
                             val mimeType = call.argument<String>("mime_type") ?: "application/octet-stream"
                             val srcPath = call.argument<String>("src_path") ?: ""
                             val createdUri = withContext(Dispatchers.IO) {
                                 if (treeUriStr.isBlank()) return@withContext null
+                                if (fileName.isBlank()) return@withContext null
                                 val dir = ensureDocumentDir(Uri.parse(treeUriStr), relativeDir) ?: return@withContext null
                                 val existing = dir.findFile(fileName)
                                 val createdNew = existing == null
@@ -1716,7 +1744,7 @@ class MainActivity: FlutterFragmentActivity() {
                             val trackName = call.argument<String>("track_name") ?: ""
                             val artistName = call.argument<String>("artist_name") ?: ""
                             val spotifyId = call.argument<String>("spotify_id") ?: ""
-                            val durationMs = call.argument<Long>("duration_ms") ?: 0L
+                            val durationMs = call.argument<Number>("duration_ms")?.toLong() ?: 0L
                             val outputPath = call.argument<String>("output_path") ?: ""
                             val response = withContext(Dispatchers.IO) {
                                 try {
@@ -2093,24 +2121,6 @@ class MainActivity: FlutterFragmentActivity() {
                             }
                             result.success(response)
                         }
-                        "downloadWithExtensions" -> {
-                            val requestJson = call.arguments as String
-                            val response = withContext(Dispatchers.IO) {
-                                handleSafDownload(requestJson) { json ->
-                                    Gobackend.downloadWithExtensionsJSON(json)
-                                }
-                            }
-                            result.success(response)
-                        }
-                        "downloadFromYouTube" -> {
-                            val requestJson = call.arguments as String
-                            val response = withContext(Dispatchers.IO) {
-                                handleSafDownload(requestJson) { json ->
-                                    Gobackend.downloadFromYouTube(json)
-                                }
-                            }
-                            result.success(response)
-                        }
                         "enrichTrackWithExtension" -> {
                             val extensionId = call.argument<String>("extension_id") ?: ""
                             val trackJson = call.argument<String>("track") ?: "{}"

go_backend/amazon.go

@@ -31,6 +31,8 @@ type AmazonDownloader struct {
 var (
 	globalAmazonDownloader *AmazonDownloader
 	amazonDownloaderOnce   sync.Once
+	amazonASINRegex        = regexp.MustCompile(`(?i)^B[0-9A-Z]{9}$`)
+	amazonASINFindRegex    = regexp.MustCompile(`(?i)B[0-9A-Z]{9}`)
 )
 
 // AfkarXYZResponse is the response from AfkarXYZ API
@@ -43,6 +45,12 @@ type AfkarXYZResponse struct {
 	} `json:"data"`
 }
 
+// AmazonStreamResponse is the new response format from amazon.afkarxyz.fun/api/track/{asin}
+type AmazonStreamResponse struct {
+	StreamURL     string `json:"streamUrl"`
+	DecryptionKey string `json:"decryptionKey"`
+}
+
 func NewAmazonDownloader() *AmazonDownloader {
 	amazonDownloaderOnce.Do(func() {
 		globalAmazonDownloader = &AmazonDownloader{
@@ -52,10 +60,9 @@ func NewAmazonDownloader() *AmazonDownloader {
 	return globalAmazonDownloader
 }
 
-// fetchAmazonURLWithRetry fetches from AfkarXYZ API with retry logic for mobile networks
+// fetchAmazonURLWithRetry fetches from AfkarXYZ API with retry logic for mobile networks.
-func (a *AmazonDownloader) fetchAmazonURLWithRetry(amazonURL string) (string, string, error) {
+// Returns downloadURL, suggested fileName, optional decryptionKey.
-	apiURL := "https://amazon.afkarxyz.fun/convert?url=" + url.QueryEscape(amazonURL)
+func (a *AmazonDownloader) fetchAmazonURLWithRetry(amazonURL string) (string, string, string, error) {
-
 	var lastErr error
 	for attempt := 0; attempt <= amazonMaxRetries; attempt++ {
 		if attempt > 0 {
@@ -64,66 +71,184 @@ func (a *AmazonDownloader) fetchAmazonURLWithRetry(amazonURL string) (string, st
 			time.Sleep(delay)
 		}
 
-		downloadURL, fileName, err := a.doAfkarXYZRequest(apiURL)
+		downloadURL, fileName, decryptionKey, err := a.doAfkarXYZRequest(amazonURL)
 		if err == nil {
-			return downloadURL, fileName, nil
+			return downloadURL, fileName, decryptionKey, nil
 		}
 
 		lastErr = err
-		errStr := err.Error()
+		errStr := strings.ToLower(err.Error())
 
 		// Check if error is retryable
 		isRetryable := strings.Contains(errStr, "timeout") ||
 			strings.Contains(errStr, "connection reset") ||
 			strings.Contains(errStr, "connection refused") ||
-			strings.Contains(errStr, "EOF") ||
+			strings.Contains(errStr, "eof") ||
 			strings.Contains(errStr, "status 5") ||
-			strings.Contains(errStr, "status 429")
+			strings.Contains(errStr, "status 429") ||
+			strings.Contains(errStr, "http 429")
 
 		if !isRetryable {
-			return "", "", err
+			return "", "", "", err
 		}
 
 		GoLog("[Amazon] Attempt %d failed (retryable): %v\n", attempt+1, err)
 	}
 
-	return "", "", fmt.Errorf("all %d attempts failed: %w", amazonMaxRetries+1, lastErr)
+	return "", "", "", fmt.Errorf("all %d attempts failed: %w", amazonMaxRetries+1, lastErr)
 }
 
-// doAfkarXYZRequest performs a single request to AfkarXYZ API
+func normalizeAmazonASIN(candidate string) string {
-func (a *AmazonDownloader) doAfkarXYZRequest(apiURL string) (string, string, error) {
+	trimmed := strings.TrimSpace(candidate)
+	if trimmed == "" {
+		return ""
+	}
+
+	if decoded, err := url.QueryUnescape(trimmed); err == nil {
+		trimmed = decoded
+	}
+
+	trimmed = strings.ToUpper(trimmed)
+	if idx := strings.IndexAny(trimmed, "?#&/"); idx >= 0 {
+		trimmed = trimmed[:idx]
+	}
+
+	if amazonASINRegex.MatchString(trimmed) {
+		return trimmed
+	}
+
+	return ""
+}
+
+func extractAmazonASIN(amazonURL string) string {
+	raw := strings.TrimSpace(amazonURL)
+	if raw == "" {
+		return ""
+	}
+
+	parsed, err := url.Parse(raw)
+	if err == nil {
+		query := parsed.Query()
+
+		// Prefer track-level ASIN when URL also contains albumAsin.
+		for _, key := range []string{"trackAsin", "trackasin", "trackASIN", "asin", "ASIN", "i"} {
+			if asin := normalizeAmazonASIN(query.Get(key)); asin != "" {
+				return asin
+			}
+		}
+
+		path := strings.Trim(parsed.Path, "/")
+		if path != "" {
+			segments := strings.Split(path, "/")
+
+			for i := 0; i < len(segments)-1; i++ {
+				segment := strings.ToLower(strings.TrimSpace(segments[i]))
+				if segment == "track" || segment == "tracks" {
+					if asin := normalizeAmazonASIN(segments[i+1]); asin != "" {
+						return asin
+					}
+				}
+			}
+
+			if asin := normalizeAmazonASIN(segments[len(segments)-1]); asin != "" {
+				return asin
+			}
+		}
+	}
+
+	match := amazonASINFindRegex.FindString(strings.ToUpper(raw))
+	return normalizeAmazonASIN(match)
+}
+
+// doAfkarXYZRequest performs a single request to Amazon API.
+// It tries new endpoint first, then falls back to legacy /convert endpoint.
+func (a *AmazonDownloader) doAfkarXYZRequest(amazonURL string) (string, string, string, error) {
+	asin := extractAmazonASIN(amazonURL)
+	if asin != "" {
+		GoLog("[Amazon] Using ASIN: %s\n", asin)
+		downloadURL, fileName, decryptKey, err := a.doAfkarXYZRequestNew(asin)
+		if err == nil {
+			return downloadURL, fileName, decryptKey, nil
+		}
+		GoLog("[Amazon] New API failed for ASIN %s, trying legacy endpoint: %v\n", asin, err)
+	}
+	return a.doAfkarXYZRequestLegacy(amazonURL)
+}
+
+func (a *AmazonDownloader) doAfkarXYZRequestNew(asin string) (string, string, string, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), amazonAPITimeoutMobile)
 	defer cancel()
 
+	apiURL := fmt.Sprintf("https://amazon.afkarxyz.fun/api/track/%s", asin)
 	req, err := http.NewRequestWithContext(ctx, "GET", apiURL, nil)
 	if err != nil {
-		return "", "", fmt.Errorf("failed to create request: %w", err)
+		return "", "", "", fmt.Errorf("failed to create request: %w", err)
+	}
+
+	req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36")
+
+	resp, err := a.client.Do(req)
+	if err != nil {
+		return "", "", "", fmt.Errorf("failed to call Amazon API: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != 200 {
+		return "", "", "", fmt.Errorf("Amazon API returned status %d", resp.StatusCode)
+	}
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "", "", "", fmt.Errorf("failed to read response: %w", err)
+	}
+
+	var apiResp AmazonStreamResponse
+	if err := json.Unmarshal(body, &apiResp); err != nil {
+		return "", "", "", fmt.Errorf("failed to decode response: %w", err)
+	}
+
+	if strings.TrimSpace(apiResp.StreamURL) == "" {
+		return "", "", "", fmt.Errorf("Amazon API returned empty stream URL")
+	}
+
+	fileName := asin + ".m4a"
+	return apiResp.StreamURL, fileName, strings.TrimSpace(apiResp.DecryptionKey), nil
+}
+
+func (a *AmazonDownloader) doAfkarXYZRequestLegacy(amazonURL string) (string, string, string, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), amazonAPITimeoutMobile)
+	defer cancel()
+
+	apiURL := "https://amazon.afkarxyz.fun/convert?url=" + url.QueryEscape(amazonURL)
+	req, err := http.NewRequestWithContext(ctx, "GET", apiURL, nil)
+	if err != nil {
+		return "", "", "", fmt.Errorf("failed to create legacy request: %w", err)
 	}
 
 	req.Header.Set("User-Agent", getRandomUserAgent())
 
 	resp, err := a.client.Do(req)
 	if err != nil {
-		return "", "", fmt.Errorf("failed to call AfkarXYZ API: %w", err)
+		return "", "", "", fmt.Errorf("failed to call legacy AfkarXYZ API: %w", err)
 	}
 	defer resp.Body.Close()
 
 	if resp.StatusCode != 200 {
-		return "", "", fmt.Errorf("AfkarXYZ API returned status %d", resp.StatusCode)
+		return "", "", "", fmt.Errorf("legacy AfkarXYZ API returned status %d", resp.StatusCode)
 	}
 
 	body, err := io.ReadAll(resp.Body)
 	if err != nil {
-		return "", "", fmt.Errorf("failed to read response: %w", err)
+		return "", "", "", fmt.Errorf("failed to read legacy response: %w", err)
 	}
 
 	var apiResp AfkarXYZResponse
 	if err := json.Unmarshal(body, &apiResp); err != nil {
-		return "", "", fmt.Errorf("failed to decode response: %w", err)
+		return "", "", "", fmt.Errorf("failed to decode legacy response: %w", err)
 	}
 
-	if !apiResp.Success || apiResp.Data.DirectLink == "" {
+	if !apiResp.Success || strings.TrimSpace(apiResp.Data.DirectLink) == "" {
-		return "", "", fmt.Errorf("AfkarXYZ API failed or no download link found")
+		return "", "", "", fmt.Errorf("legacy AfkarXYZ API failed or no download link found")
 	}
 
 	fileName := apiResp.Data.FileName
@@ -134,19 +259,22 @@ func (a *AmazonDownloader) doAfkarXYZRequest(apiURL string) (string, string, err
 	reg := regexp.MustCompile(`[<>:"/\\|?*]`)
 	fileName = reg.ReplaceAllString(fileName, "")
 
-	return apiResp.Data.DirectLink, fileName, nil
+	return apiResp.Data.DirectLink, fileName, "", nil
 }
 
-func (a *AmazonDownloader) downloadFromAfkarXYZ(amazonURL string) (string, string, error) {
+func (a *AmazonDownloader) downloadFromAfkarXYZ(amazonURL string) (string, string, string, error) {
 	GoLog("[Amazon] Fetching from AfkarXYZ API...\n")
 
-	downloadURL, fileName, err := a.fetchAmazonURLWithRetry(amazonURL)
+	downloadURL, fileName, decryptionKey, err := a.fetchAmazonURLWithRetry(amazonURL)
 	if err != nil {
-		return "", "", err
+		return "", "", "", err
 	}
 
+	if decryptionKey != "" {
+		GoLog("[Amazon] AfkarXYZ returned encrypted stream (decryption key available)\n")
+	}
 	GoLog("[Amazon] AfkarXYZ returned: %s\n", fileName)
-	return downloadURL, fileName, nil
+	return downloadURL, fileName, decryptionKey, nil
 }
 
 func (a *AmazonDownloader) DownloadFile(downloadURL, outputPath string, outputFD int, itemID string) error {
@@ -233,17 +361,18 @@ func (a *AmazonDownloader) DownloadFile(downloadURL, outputPath string, outputFD
 
 // AmazonDownloadResult contains download result with quality info
 type AmazonDownloadResult struct {
-	FilePath    string
+	FilePath      string
-	BitDepth    int
+	BitDepth      int
-	SampleRate  int
+	SampleRate    int
-	Title       string
+	Title         string
-	Artist      string
+	Artist        string
-	Album       string
+	Album         string
-	ReleaseDate string
+	ReleaseDate   string
-	TrackNumber int
+	TrackNumber   int
-	DiscNumber  int
+	DiscNumber    int
-	ISRC        string
+	ISRC          string
-	LyricsLRC   string
+	LyricsLRC     string
+	DecryptionKey string
 }
 
 func downloadFromAmazon(req DownloadRequest) (AmazonDownloadResult, error) {
@@ -299,7 +428,7 @@ func downloadFromAmazon(req DownloadRequest) (AmazonDownloadResult, error) {
 	}
 
 	// Download using AfkarXYZ API
-	downloadURL, _, err := downloader.downloadFromAfkarXYZ(amazonURL)
+	downloadURL, afkarFileName, decryptionKey, err := downloader.downloadFromAfkarXYZ(amazonURL)
 	if err != nil {
 		return AmazonDownloadResult{}, fmt.Errorf("failed to get download URL from AfkarXYZ: %w", err)
 	}
@@ -321,7 +450,11 @@ func downloadFromAmazon(req DownloadRequest) (AmazonDownloadResult, error) {
 			outputPath = fmt.Sprintf("/proc/self/fd/%d", req.OutputFD)
 		}
 	} else {
-		filename = sanitizeFilename(filename) + ".flac"
+		outputExt := strings.ToLower(filepath.Ext(afkarFileName))
+		if outputExt == "" {
+			outputExt = ".flac"
+		}
+		filename = sanitizeFilename(filename) + outputExt
 		outputPath = filepath.Join(req.OutputDir, filename)
 		if fileInfo, statErr := os.Stat(outputPath); statErr == nil && fileInfo.Size() > 0 {
 			return AmazonDownloadResult{FilePath: "EXISTS:" + outputPath}, nil
@@ -352,6 +485,12 @@ func downloadFromAmazon(req DownloadRequest) (AmazonDownloadResult, error) {
 		return AmazonDownloadResult{}, fmt.Errorf("download failed: %w", err)
 	}
 
+	actualOutputPath := outputPath
+	needsDecryption := strings.TrimSpace(decryptionKey) != ""
+	if needsDecryption {
+		GoLog("[Amazon] Download requires decryption; deferring decrypt to Flutter FFmpeg path\n")
+	}
+
 	// Wait for parallel operations to complete
 	<-parallelDone
 
@@ -360,7 +499,6 @@ func downloadFromAmazon(req DownloadRequest) (AmazonDownloadResult, error) {
 		SetItemFinalizing(req.ItemID)
 	}
 
-	existingMeta, metaErr := ReadMetadata(outputPath)
 	actualTrackNum := req.TrackNumber
 	actualDiscNum := req.DiscNumber
 	actualDate := req.ReleaseDate
@@ -368,25 +506,28 @@ func downloadFromAmazon(req DownloadRequest) (AmazonDownloadResult, error) {
 	actualTitle := req.TrackName
 	actualArtist := req.ArtistName
 
-	if metaErr == nil && existingMeta != nil {
+	if !needsDecryption {
-		if existingMeta.TrackNumber > 0 && (req.TrackNumber == 0 || req.TrackNumber == 1) {
+		existingMeta, metaErr := ReadMetadata(actualOutputPath)
-			actualTrackNum = existingMeta.TrackNumber
+		if metaErr == nil && existingMeta != nil {
-			GoLog("[Amazon] Using track number from file: %d (request had: %d)\n", actualTrackNum, req.TrackNumber)
+			if existingMeta.TrackNumber > 0 && (req.TrackNumber == 0 || req.TrackNumber == 1) {
+				actualTrackNum = existingMeta.TrackNumber
+				GoLog("[Amazon] Using track number from file: %d (request had: %d)\n", actualTrackNum, req.TrackNumber)
+			}
+			if existingMeta.DiscNumber > 0 && (req.DiscNumber == 0 || req.DiscNumber == 1) {
+				actualDiscNum = existingMeta.DiscNumber
+				GoLog("[Amazon] Using disc number from file: %d (request had: %d)\n", actualDiscNum, req.DiscNumber)
+			}
+			if existingMeta.Date != "" && req.ReleaseDate == "" {
+				actualDate = existingMeta.Date
+				GoLog("[Amazon] Using release date from file: %s\n", actualDate)
+			}
+			if existingMeta.Album != "" && req.AlbumName == "" {
+				actualAlbum = existingMeta.Album
+				GoLog("[Amazon] Using album from file: %s\n", actualAlbum)
+			}
+			GoLog("[Amazon] Existing metadata - Title: %s, Artist: %s, Album: %s, Date: %s\n",
+				existingMeta.Title, existingMeta.Artist, existingMeta.Album, existingMeta.Date)
 		}
-		if existingMeta.DiscNumber > 0 && (req.DiscNumber == 0 || req.DiscNumber == 1) {
-			actualDiscNum = existingMeta.DiscNumber
-			GoLog("[Amazon] Using disc number from file: %d (request had: %d)\n", actualDiscNum, req.DiscNumber)
-		}
-		if existingMeta.Date != "" && req.ReleaseDate == "" {
-			actualDate = existingMeta.Date
-			GoLog("[Amazon] Using release date from file: %s\n", actualDate)
-		}
-		if existingMeta.Album != "" && req.AlbumName == "" {
-			actualAlbum = existingMeta.Album
-			GoLog("[Amazon] Using album from file: %s\n", actualAlbum)
-		}
-		GoLog("[Amazon] Existing metadata - Title: %s, Artist: %s, Album: %s, Date: %s\n",
-			existingMeta.Title, existingMeta.Artist, existingMeta.Album, existingMeta.Date)
 	}
 
 	metadata := Metadata{
@@ -409,7 +550,7 @@ func downloadFromAmazon(req DownloadRequest) (AmazonDownloadResult, error) {
 		coverData = parallelResult.CoverData
 		GoLog("[Amazon] Using parallel-fetched cover (%d bytes)\n", len(coverData))
 	} else {
-		existingCover, coverErr := ExtractCoverArt(outputPath)
+		existingCover, coverErr := ExtractCoverArt(actualOutputPath)
 		if coverErr == nil && len(existingCover) > 0 {
 			coverData = existingCover
 			GoLog("[Amazon] Using existing cover from Amazon file (%d bytes)\n", len(coverData))
@@ -418,11 +559,16 @@ func downloadFromAmazon(req DownloadRequest) (AmazonDownloadResult, error) {
 		}
 	}
 
-	if isSafOutput {
+	if isSafOutput || needsDecryption {
 		GoLog("[Amazon] SAF output detected - skipping in-backend metadata/lyrics embedding (handled in Flutter)\n")
 	} else {
-		if err := EmbedMetadataWithCoverData(outputPath, metadata, coverData); err != nil {
+		isFlacOutput := strings.HasSuffix(strings.ToLower(actualOutputPath), ".flac")
-			GoLog("[Amazon] Warning: failed to embed metadata: %v\n", err)
+		if isFlacOutput {
+			if err := EmbedMetadataWithCoverData(actualOutputPath, metadata, coverData); err != nil {
+				GoLog("[Amazon] Warning: failed to embed metadata: %v\n", err)
+			}
+		} else {
+			GoLog("[Amazon] Non-FLAC output detected (%s), skipping native metadata embedding\n", filepath.Ext(actualOutputPath))
 		}
 
 		if req.EmbedLyrics && parallelResult != nil && parallelResult.LyricsLRC != "" {
@@ -433,20 +579,22 @@ func downloadFromAmazon(req DownloadRequest) (AmazonDownloadResult, error) {
 
 			if lyricsMode == "external" || lyricsMode == "both" {
 				GoLog("[Amazon] Saving external LRC file...\n")
-				if lrcPath, lrcErr := SaveLRCFile(outputPath, parallelResult.LyricsLRC); lrcErr != nil {
+				if lrcPath, lrcErr := SaveLRCFile(actualOutputPath, parallelResult.LyricsLRC); lrcErr != nil {
 					GoLog("[Amazon] Warning: failed to save LRC file: %v\n", lrcErr)
 				} else {
 					GoLog("[Amazon] LRC file saved: %s\n", lrcPath)
 				}
 			}
 
-			if lyricsMode == "embed" || lyricsMode == "both" {
+			if (lyricsMode == "embed" || lyricsMode == "both") && isFlacOutput {
 				GoLog("[Amazon] Embedding parallel-fetched lyrics (%d lines)...\n", len(parallelResult.LyricsData.Lines))
-				if embedErr := EmbedLyrics(outputPath, parallelResult.LyricsLRC); embedErr != nil {
+				if embedErr := EmbedLyrics(actualOutputPath, parallelResult.LyricsLRC); embedErr != nil {
 					GoLog("[Amazon] Warning: failed to embed lyrics: %v\n", embedErr)
 				} else {
 					GoLog("[Amazon] Lyrics embedded successfully\n")
 				}
+			} else if (lyricsMode == "embed" || lyricsMode == "both") && !isFlacOutput {
+				GoLog("[Amazon] Skipping embedded lyrics for non-FLAC output\n")
 			}
 		} else if req.EmbedLyrics {
 			GoLog("[Amazon] No lyrics available from parallel fetch\n")
@@ -456,17 +604,17 @@ func downloadFromAmazon(req DownloadRequest) (AmazonDownloadResult, error) {
 	GoLog("[Amazon] Downloaded successfully from Amazon Music\n")
 
 	quality := AudioQuality{}
-	if isSafOutput {
+	if isSafOutput || needsDecryption {
 		GoLog("[Amazon] SAF output detected - skipping post-write file inspection in backend\n")
 	} else {
-		quality, err = GetAudioQuality(outputPath)
+		quality, err = GetAudioQuality(actualOutputPath)
 		if err != nil {
 			GoLog("[Amazon] Warning: couldn't read quality from file: %v\n", err)
 		} else {
 			GoLog("[Amazon] Actual quality: %d-bit/%dHz\n", quality.BitDepth, quality.SampleRate)
 		}
 
-		finalMeta, metaReadErr := ReadMetadata(outputPath)
+		finalMeta, metaReadErr := ReadMetadata(actualOutputPath)
 		if metaReadErr == nil && finalMeta != nil {
 			GoLog("[Amazon] Final metadata from file - Track: %d, Disc: %d, Date: %s\n",
 				finalMeta.TrackNumber, finalMeta.DiscNumber, finalMeta.Date)
@@ -478,9 +626,10 @@ func downloadFromAmazon(req DownloadRequest) (AmazonDownloadResult, error) {
 		}
 	}
 
-	// Add to ISRC index for fast duplicate checking
+	// Add to ISRC index for fast duplicate checking.
-	if !isSafOutput {
+	// When decryption is pending in Flutter, postpone indexing until final file is settled.
-		AddToISRCIndex(req.OutputDir, req.ISRC, outputPath)
+	if !isSafOutput && !needsDecryption {
+		AddToISRCIndex(req.OutputDir, req.ISRC, actualOutputPath)
 	}
 
 	bitDepth := 0
@@ -496,16 +645,17 @@ func downloadFromAmazon(req DownloadRequest) (AmazonDownloadResult, error) {
 	}
 
 	return AmazonDownloadResult{
-		FilePath:    outputPath,
+		FilePath:      outputPath,
-		BitDepth:    bitDepth,
+		BitDepth:      bitDepth,
-		SampleRate:  sampleRate,
+		SampleRate:    sampleRate,
-		Title:       req.TrackName,
+		Title:         req.TrackName,
-		Artist:      req.ArtistName,
+		Artist:        req.ArtistName,
-		Album:       req.AlbumName,
+		Album:         req.AlbumName,
-		ReleaseDate: req.ReleaseDate,
+		ReleaseDate:   req.ReleaseDate,
-		TrackNumber: actualTrackNum,
+		TrackNumber:   actualTrackNum,
-		DiscNumber:  actualDiscNum,
+		DiscNumber:    actualDiscNum,
-		ISRC:        req.ISRC,
+		ISRC:          req.ISRC,
-		LyricsLRC:   lyricsLRC,
+		LyricsLRC:     lyricsLRC,
+		DecryptionKey: decryptionKey,
 	}, nil
 }

go_backend/amazon_asin_test.go

@@ -0,0 +1,46 @@
+package gobackend
+
+import "testing"
+
+func TestExtractAmazonASIN(t *testing.T) {
+	tests := []struct {
+		name string
+		url  string
+		want string
+	}{
+		{
+			name: "prefers trackAsin over albumAsin",
+			url:  "https://music.amazon.com/albums/B0ALBUM123?trackAsin=B0TRACK456&musicTerritory=US",
+			want: "B0TRACK456",
+		},
+		{
+			name: "extract from tracks path",
+			url:  "https://music.amazon.com/tracks/B0CYQHGWZJ?musicTerritory=US",
+			want: "B0CYQHGWZJ",
+		},
+		{
+			name: "extract from plain query asin",
+			url:  "https://example.com/?asin=B0CYQHGWZJ",
+			want: "B0CYQHGWZJ",
+		},
+		{
+			name: "fallback regex",
+			url:  "https://example.com/path/B0CYQHGWZJ",
+			want: "B0CYQHGWZJ",
+		},
+		{
+			name: "invalid url",
+			url:  "https://music.amazon.com/tracks/not-valid",
+			want: "",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := extractAmazonASIN(tt.url)
+			if got != tt.want {
+				t.Fatalf("extractAmazonASIN() = %q, want %q", got, tt.want)
+			}
+		})
+	}
+}

go_backend/audio_metadata.go

@@ -23,6 +23,7 @@ type AudioMetadata struct {
 	TrackNumber int
 	DiscNumber  int
 	ISRC        string
+	Lyrics      string
 	Label       string
 	Copyright   string
 	Composer    string
@@ -181,6 +182,15 @@ func parseID3v22Frames(data []byte, metadata *AudioMetadata, tagUnsync bool) {
 			metadata.Label = value
 		case "TCR":
 			metadata.Copyright = value
+		case "ULT":
+			if v := extractLyricsFrame(frameData); v != "" && metadata.Lyrics == "" {
+				metadata.Lyrics = v
+			}
+		case "TXX":
+			desc, userValue := extractUserTextFrame(frameData)
+			if isLyricsDescription(desc) && userValue != "" && metadata.Lyrics == "" {
+				metadata.Lyrics = userValue
+			}
 		}
 
 		pos += 6 + frameSize
@@ -297,6 +307,15 @@ func parseID3v23Frames(data []byte, metadata *AudioMetadata, version byte, tagUn
 			if v := extractCommentFrame(frameData); v != "" {
 				metadata.Comment = v
 			}
+		case "USLT":
+			if v := extractLyricsFrame(frameData); v != "" && metadata.Lyrics == "" {
+				metadata.Lyrics = v
+			}
+		case "TXXX":
+			desc, userValue := extractUserTextFrame(frameData)
+			if isLyricsDescription(desc) && userValue != "" && metadata.Lyrics == "" {
+				metadata.Lyrics = userValue
+			}
 		}
 
 		pos += 10 + frameSize
@@ -399,6 +418,98 @@ func extractCommentFrame(data []byte) string {
 	return extractTextFrame(framed)
 }
 
+// extractLyricsFrame parses ID3 unsynchronized lyrics frames (USLT/ULT).
+// Format: encoding(1) + language(3) + description(null-terminated) + lyrics text.
+func extractLyricsFrame(data []byte) string {
+	if len(data) < 5 {
+		return ""
+	}
+
+	encoding := data[0]
+	rest := data[4:] // skip 3-byte language code
+
+	var text []byte
+	switch encoding {
+	case 1, 2: // UTF-16 variants use double-null terminator
+		for i := 0; i+1 < len(rest); i += 2 {
+			if rest[i] == 0 && rest[i+1] == 0 {
+				text = rest[i+2:]
+				break
+			}
+		}
+	default: // ISO-8859-1 or UTF-8
+		idx := bytes.IndexByte(rest, 0)
+		if idx >= 0 && idx+1 < len(rest) {
+			text = rest[idx+1:]
+		} else {
+			text = rest
+		}
+	}
+
+	if len(text) == 0 {
+		return ""
+	}
+
+	framed := make([]byte, 1+len(text))
+	framed[0] = encoding
+	copy(framed[1:], text)
+	return extractTextFrame(framed)
+}
+
+// extractUserTextFrame parses ID3 TXXX/TXX user text frame:
+// encoding(1) + description + separator + value.
+func extractUserTextFrame(data []byte) (string, string) {
+	if len(data) < 2 {
+		return "", ""
+	}
+
+	encoding := data[0]
+	payload := data[1:]
+
+	var descRaw, valueRaw []byte
+	switch encoding {
+	case 1, 2: // UTF-16 variants
+		for i := 0; i+1 < len(payload); i += 2 {
+			if payload[i] == 0 && payload[i+1] == 0 {
+				descRaw = payload[:i]
+				valueRaw = payload[i+2:]
+				break
+			}
+		}
+	default: // ISO-8859-1 or UTF-8
+		idx := bytes.IndexByte(payload, 0)
+		if idx >= 0 {
+			descRaw = payload[:idx]
+			if idx+1 <= len(payload) {
+				valueRaw = payload[idx+1:]
+			}
+		}
+	}
+
+	if len(valueRaw) == 0 {
+		return "", ""
+	}
+
+	descFramed := make([]byte, 1+len(descRaw))
+	descFramed[0] = encoding
+	copy(descFramed[1:], descRaw)
+
+	valueFramed := make([]byte, 1+len(valueRaw))
+	valueFramed[0] = encoding
+	copy(valueFramed[1:], valueRaw)
+
+	return strings.TrimSpace(extractTextFrame(descFramed)), strings.TrimSpace(extractTextFrame(valueFramed))
+}
+
+func isLyricsDescription(description string) bool {
+	switch strings.ToLower(strings.TrimSpace(description)) {
+	case "lyrics", "lyric", "unsyncedlyrics", "unsynced lyrics", "lrc":
+		return true
+	default:
+		return false
+	}
+}
+
 func decodeUTF16(data []byte) string {
 	if len(data) < 2 {
 		return ""
@@ -800,9 +911,16 @@ func parseVorbisComments(data []byte, metadata *AudioMetadata) {
 			break
 		}
 
-		if commentLen > 10000 {
+		remaining := uint32(reader.Len())
+		if commentLen > remaining {
 			break
 		}
+		// Large comment entries are typically METADATA_BLOCK_PICTURE.
+		// Skip them so we can continue parsing normal text tags after/before.
+		if commentLen > 512*1024 {
+			reader.Seek(int64(commentLen), io.SeekCurrent)
+			continue
+		}
 
 		comment := make([]byte, commentLen)
 		if _, err := reader.Read(comment); err != nil {
@@ -843,6 +961,10 @@ func parseVorbisComments(data []byte, metadata *AudioMetadata) {
 			metadata.Composer = value
 		case "COMMENT", "DESCRIPTION":
 			metadata.Comment = value
+		case "LYRICS", "UNSYNCEDLYRICS":
+			if metadata.Lyrics == "" {
+				metadata.Lyrics = value
+			}
 		case "ORGANIZATION", "LABEL", "PUBLISHER":
 			metadata.Label = value
 		case "COPYRIGHT":

go_backend/deezer.go

@@ -28,15 +28,23 @@ const (
 	deezerAPITimeoutMobile = 25 * time.Second
 	deezerMaxRetries       = 2
 	deezerRetryDelay       = 500 * time.Millisecond
+
+	deezerMaxSearchCacheEntries = 300
+	deezerMaxAlbumCacheEntries  = 200
+	deezerMaxArtistCacheEntries = 200
+	deezerMaxISRCCacheEntries   = 4000
+	deezerCacheCleanupInterval  = 5 * time.Minute
 )
 
 type DeezerClient struct {
-	httpClient  *http.Client
+	httpClient           *http.Client
-	searchCache map[string]*cacheEntry
+	searchCache          map[string]*cacheEntry
-	albumCache  map[string]*cacheEntry
+	albumCache           map[string]*cacheEntry
-	artistCache map[string]*cacheEntry
+	artistCache          map[string]*cacheEntry
-	isrcCache   map[string]string
+	isrcCache            map[string]string
-	cacheMu     sync.RWMutex
+	cacheMu              sync.RWMutex
+	lastCacheCleanup     time.Time
+	cacheCleanupInterval time.Duration
 }
 
 var (
@@ -47,16 +55,111 @@ var (
 func GetDeezerClient() *DeezerClient {
 	deezerClientOnce.Do(func() {
 		deezerClient = &DeezerClient{
-			httpClient:  NewMetadataHTTPClient(deezerAPITimeoutMobile),
+			httpClient:           NewMetadataHTTPClient(deezerAPITimeoutMobile),
-			searchCache: make(map[string]*cacheEntry),
+			searchCache:          make(map[string]*cacheEntry),
-			albumCache:  make(map[string]*cacheEntry),
+			albumCache:           make(map[string]*cacheEntry),
-			artistCache: make(map[string]*cacheEntry),
+			artistCache:          make(map[string]*cacheEntry),
-			isrcCache:   make(map[string]string),
+			isrcCache:            make(map[string]string),
+			cacheCleanupInterval: deezerCacheCleanupInterval,
 		}
 	})
 	return deezerClient
 }
 
+func (c *DeezerClient) pruneExpiredCacheEntriesLocked(
+	cache map[string]*cacheEntry,
+	now time.Time,
+) {
+	for key, entry := range cache {
+		if entry == nil || now.After(entry.expiresAt) {
+			delete(cache, key)
+		}
+	}
+}
+
+func (c *DeezerClient) trimCacheEntriesLocked(
+	cache map[string]*cacheEntry,
+	maxEntries int,
+) {
+	if maxEntries <= 0 || len(cache) <= maxEntries {
+		return
+	}
+
+	for len(cache) > maxEntries {
+		var oldestKey string
+		var oldestExpiry time.Time
+		first := true
+		for key, entry := range cache {
+			expiry := time.Time{}
+			if entry != nil {
+				expiry = entry.expiresAt
+			}
+			if first || expiry.Before(oldestExpiry) {
+				first = false
+				oldestKey = key
+				oldestExpiry = expiry
+			}
+		}
+		if oldestKey == "" {
+			return
+		}
+		delete(cache, oldestKey)
+	}
+}
+
+func (c *DeezerClient) trimStringCacheEntriesLocked(
+	cache map[string]string,
+	maxEntries int,
+) {
+	if maxEntries <= 0 || len(cache) <= maxEntries {
+		return
+	}
+
+	toRemove := len(cache) - maxEntries
+	for key := range cache {
+		delete(cache, key)
+		toRemove--
+		if toRemove <= 0 {
+			return
+		}
+	}
+}
+
+func (c *DeezerClient) maybeCleanupCachesLocked(now time.Time) {
+	periodicCleanupDue := c.cacheCleanupInterval > 0 &&
+		(c.lastCacheCleanup.IsZero() ||
+			now.Sub(c.lastCacheCleanup) >= c.cacheCleanupInterval)
+
+	if periodicCleanupDue {
+		c.pruneExpiredCacheEntriesLocked(c.searchCache, now)
+		c.pruneExpiredCacheEntriesLocked(c.albumCache, now)
+		c.pruneExpiredCacheEntriesLocked(c.artistCache, now)
+		c.lastCacheCleanup = now
+	}
+
+	if len(c.searchCache) > deezerMaxSearchCacheEntries {
+		if !periodicCleanupDue {
+			c.pruneExpiredCacheEntriesLocked(c.searchCache, now)
+		}
+		c.trimCacheEntriesLocked(c.searchCache, deezerMaxSearchCacheEntries)
+	}
+	if len(c.albumCache) > deezerMaxAlbumCacheEntries {
+		if !periodicCleanupDue {
+			c.pruneExpiredCacheEntriesLocked(c.albumCache, now)
+		}
+		c.trimCacheEntriesLocked(c.albumCache, deezerMaxAlbumCacheEntries)
+	}
+	if len(c.artistCache) > deezerMaxArtistCacheEntries {
+		if !periodicCleanupDue {
+			c.pruneExpiredCacheEntriesLocked(c.artistCache, now)
+		}
+		c.trimCacheEntriesLocked(c.artistCache, deezerMaxArtistCacheEntries)
+	}
+	if len(c.isrcCache) > deezerMaxISRCCacheEntries {
+		c.trimStringCacheEntriesLocked(c.isrcCache, deezerMaxISRCCacheEntries)
+	}
+}
+
 type deezerTrack struct {
 	ID            int64             `json:"id"`
 	Title         string            `json:"title"`
@@ -414,10 +517,12 @@ func (c *DeezerClient) SearchAll(ctx context.Context, query string, trackLimit,
 	GoLog("[Deezer] SearchAll complete: %d tracks, %d artists, %d albums, %d playlists\n", len(result.Tracks), len(result.Artists), len(result.Albums), len(result.Playlists))
 
 	c.cacheMu.Lock()
+	now := time.Now()
 	c.searchCache[cacheKey] = &cacheEntry{
 		data:      result,
-		expiresAt: time.Now().Add(deezerCacheTTL),
+		expiresAt: now.Add(deezerCacheTTL),
 	}
+	c.maybeCleanupCachesLocked(now)
 	c.cacheMu.Unlock()
 
 	return result, nil
@@ -555,10 +660,12 @@ func (c *DeezerClient) GetAlbum(ctx context.Context, albumID string) (*AlbumResp
 	}
 
 	c.cacheMu.Lock()
+	now := time.Now()
 	c.albumCache[albumID] = &cacheEntry{
 		data:      result,
-		expiresAt: time.Now().Add(deezerCacheTTL),
+		expiresAt: now.Add(deezerCacheTTL),
 	}
+	c.maybeCleanupCachesLocked(now)
 	c.cacheMu.Unlock()
 
 	return result, nil
@@ -638,10 +745,12 @@ func (c *DeezerClient) GetArtist(ctx context.Context, artistID string) (*ArtistR
 	}
 
 	c.cacheMu.Lock()
+	now := time.Now()
 	c.artistCache[artistID] = &cacheEntry{
 		data:      result,
-		expiresAt: time.Now().Add(deezerCacheTTL),
+		expiresAt: now.Add(deezerCacheTTL),
 	}
+	c.maybeCleanupCachesLocked(now)
 	c.cacheMu.Unlock()
 
 	return result, nil
@@ -807,6 +916,7 @@ func (c *DeezerClient) fetchISRCsParallel(ctx context.Context, tracks []deezerTr
 		for trackIDStr, isrc := range directISRCs {
 			c.isrcCache[trackIDStr] = isrc
 		}
+		c.maybeCleanupCachesLocked(time.Now())
 		c.cacheMu.Unlock()
 	}
 
@@ -841,6 +951,7 @@ func (c *DeezerClient) fetchISRCsParallel(ctx context.Context, tracks []deezerTr
 
 			c.cacheMu.Lock()
 			c.isrcCache[trackIDStr] = fullTrack.ISRC
+			c.maybeCleanupCachesLocked(time.Now())
 			c.cacheMu.Unlock()
 		}(track)
 	}
@@ -864,6 +975,7 @@ func (c *DeezerClient) GetTrackISRC(ctx context.Context, trackID string) (string
 
 	c.cacheMu.Lock()
 	c.isrcCache[trackID] = fullTrack.ISRC
+	c.maybeCleanupCachesLocked(time.Now())
 	c.cacheMu.Unlock()
 
 	return fullTrack.ISRC, nil
@@ -946,10 +1058,12 @@ func (c *DeezerClient) GetAlbumExtendedMetadata(ctx context.Context, albumID str
 	}
 
 	c.cacheMu.Lock()
+	now := time.Now()
 	c.searchCache[cacheKey] = &cacheEntry{
 		data:      result,
-		expiresAt: time.Now().Add(deezerCacheTTL),
+		expiresAt: now.Add(deezerCacheTTL),
 	}
+	c.maybeCleanupCachesLocked(now)
 	c.cacheMu.Unlock()
 
 	GoLog("[Deezer] Album metadata fetched - Genre: %s, Label: %s\n", result.Genre, result.Label)

go_backend/exports.go

@@ -8,6 +8,7 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"path/filepath"
 	"strings"
 	"time"
 
@@ -47,10 +48,30 @@ func GetSpotifyMetadata(spotifyURL string) (string, error) {
 
 	client, err := NewSpotifyMetadataClient()
 	if err != nil {
+		if shouldTrySpotFetchFallback(err) {
+			data, apiErr := GetSpotifyDataWithAPI(ctx, spotifyURL, DefaultSpotFetchAPIBaseURL)
+			if apiErr == nil {
+				jsonBytes, marshalErr := json.Marshal(data)
+				if marshalErr != nil {
+					return "", marshalErr
+				}
+				return string(jsonBytes), nil
+			}
+		}
 		return "", err
 	}
 	data, err := client.GetFilteredData(ctx, spotifyURL, false, 0)
 	if err != nil {
+		if shouldTrySpotFetchFallback(err) {
+			fallbackData, apiErr := GetSpotifyDataWithAPI(ctx, spotifyURL, DefaultSpotFetchAPIBaseURL)
+			if apiErr == nil {
+				jsonBytes, marshalErr := json.Marshal(fallbackData)
+				if marshalErr != nil {
+					return "", marshalErr
+				}
+				return string(jsonBytes), nil
+			}
+		}
 		return "", err
 	}
 
@@ -150,6 +171,8 @@ type DownloadRequest struct {
 	QobuzID              string `json:"qobuz_id,omitempty"`
 	DeezerID             string `json:"deezer_id,omitempty"`
 	LyricsMode           string `json:"lyrics_mode,omitempty"`
+	UseExtensions        bool   `json:"use_extensions,omitempty"`
+	UseFallback          bool   `json:"use_fallback,omitempty"`
 }
 
 type DownloadResponse struct {
@@ -176,20 +199,90 @@ type DownloadResponse struct {
 	Copyright              string `json:"copyright,omitempty"`
 	SkipMetadataEnrichment bool   `json:"skip_metadata_enrichment,omitempty"`
 	LyricsLRC              string `json:"lyrics_lrc,omitempty"`
+	DecryptionKey          string `json:"decryption_key,omitempty"`
 }
 
 type DownloadResult struct {
-	FilePath    string
+	FilePath      string
-	BitDepth    int
+	BitDepth      int
-	SampleRate  int
+	SampleRate    int
-	Title       string
+	Title         string
-	Artist      string
+	Artist        string
-	Album       string
+	Album         string
-	ReleaseDate string
+	ReleaseDate   string
-	TrackNumber int
+	TrackNumber   int
-	DiscNumber  int
+	DiscNumber    int
-	ISRC        string
+	ISRC          string
-	LyricsLRC   string
+	LyricsLRC     string
+	DecryptionKey string
+}
+
+func buildDownloadSuccessResponse(
+	req DownloadRequest,
+	result DownloadResult,
+	service string,
+	message string,
+	filePath string,
+	alreadyExists bool,
+) DownloadResponse {
+	title := result.Title
+	if title == "" {
+		title = req.TrackName
+	}
+
+	artist := result.Artist
+	if artist == "" {
+		artist = req.ArtistName
+	}
+
+	album := result.Album
+	if album == "" {
+		album = req.AlbumName
+	}
+
+	releaseDate := result.ReleaseDate
+	if releaseDate == "" {
+		releaseDate = req.ReleaseDate
+	}
+
+	trackNumber := result.TrackNumber
+	if trackNumber == 0 {
+		trackNumber = req.TrackNumber
+	}
+
+	discNumber := result.DiscNumber
+	if discNumber == 0 {
+		discNumber = req.DiscNumber
+	}
+
+	isrc := result.ISRC
+	if isrc == "" {
+		isrc = req.ISRC
+	}
+
+	return DownloadResponse{
+		Success:          true,
+		Message:          message,
+		FilePath:         filePath,
+		AlreadyExists:    alreadyExists,
+		ActualBitDepth:   result.BitDepth,
+		ActualSampleRate: result.SampleRate,
+		Service:          service,
+		Title:            title,
+		Artist:           artist,
+		Album:            album,
+		AlbumArtist:      req.AlbumArtist,
+		ReleaseDate:      releaseDate,
+		TrackNumber:      trackNumber,
+		DiscNumber:       discNumber,
+		ISRC:             isrc,
+		CoverURL:         req.CoverURL,
+		Genre:            req.Genre,
+		Label:            req.Label,
+		Copyright:        req.Copyright,
+		LyricsLRC:        result.LyricsLRC,
+		DecryptionKey:    result.DecryptionKey,
+	}
 }
 
 func DownloadTrack(requestJSON string) (string, error) {
@@ -254,17 +347,18 @@ func DownloadTrack(requestJSON string) (string, error) {
 		amazonResult, amazonErr := downloadFromAmazon(req)
 		if amazonErr == nil {
 			result = DownloadResult{
-				FilePath:    amazonResult.FilePath,
+				FilePath:      amazonResult.FilePath,
-				BitDepth:    amazonResult.BitDepth,
+				BitDepth:      amazonResult.BitDepth,
-				SampleRate:  amazonResult.SampleRate,
+				SampleRate:    amazonResult.SampleRate,
-				Title:       amazonResult.Title,
+				Title:         amazonResult.Title,
-				Artist:      amazonResult.Artist,
+				Artist:        amazonResult.Artist,
-				Album:       amazonResult.Album,
+				Album:         amazonResult.Album,
-				ReleaseDate: amazonResult.ReleaseDate,
+				ReleaseDate:   amazonResult.ReleaseDate,
-				TrackNumber: amazonResult.TrackNumber,
+				TrackNumber:   amazonResult.TrackNumber,
-				DiscNumber:  amazonResult.DiscNumber,
+				DiscNumber:    amazonResult.DiscNumber,
-				ISRC:        amazonResult.ISRC,
+				ISRC:          amazonResult.ISRC,
-				LyricsLRC:   amazonResult.LyricsLRC,
+				LyricsLRC:     amazonResult.LyricsLRC,
+				DecryptionKey: amazonResult.DecryptionKey,
 			}
 		}
 		err = amazonErr
@@ -301,22 +395,14 @@ func DownloadTrack(requestJSON string) (string, error) {
 			result.BitDepth = quality.BitDepth
 			result.SampleRate = quality.SampleRate
 		}
-		resp := DownloadResponse{
+		resp := buildDownloadSuccessResponse(
-			Success:          true,
+			req,
-			Message:          "File already exists",
+			result,
-			FilePath:         actualPath,
+			req.Service,
-			AlreadyExists:    true,
+			"File already exists",
-			ActualBitDepth:   result.BitDepth,
+			actualPath,
-			ActualSampleRate: result.SampleRate,
+			true,
-			Service:          req.Service,
+		)
-			Title:            result.Title,
-			Artist:           result.Artist,
-			Album:            result.Album,
-			ReleaseDate:      result.ReleaseDate,
-			TrackNumber:      result.TrackNumber,
-			DiscNumber:       result.DiscNumber,
-			ISRC:             result.ISRC,
-		}
 		jsonBytes, _ := json.Marshal(resp)
 		return string(jsonBytes), nil
 	}
@@ -330,27 +416,60 @@ func DownloadTrack(requestJSON string) (string, error) {
 		GoLog("[Download] Could not read quality from file: %v\n", qErr)
 	}
 
-	resp := DownloadResponse{
+	resp := buildDownloadSuccessResponse(
-		Success:          true,
+		req,
-		Message:          "Download complete",
+		result,
-		FilePath:         result.FilePath,
+		req.Service,
-		ActualBitDepth:   result.BitDepth,
+		"Download complete",
-		ActualSampleRate: result.SampleRate,
+		result.FilePath,
-		Service:          req.Service,
+		false,
-		Title:            result.Title,
+	)
-		Artist:           result.Artist,
-		Album:            result.Album,
-		ReleaseDate:      result.ReleaseDate,
-		TrackNumber:      result.TrackNumber,
-		DiscNumber:       result.DiscNumber,
-		ISRC:             result.ISRC,
-		LyricsLRC:        result.LyricsLRC,
-	}
 
 	jsonBytes, _ := json.Marshal(resp)
 	return string(jsonBytes), nil
 }
 
+// DownloadByStrategy routes a unified download request to the appropriate flow.
+// Routing priority: YouTube service > extension fallback > built-in fallback > direct service.
+func DownloadByStrategy(requestJSON string) (string, error) {
+	var req DownloadRequest
+	if err := json.Unmarshal([]byte(requestJSON), &req); err != nil {
+		return errorResponse("Invalid request: " + err.Error())
+	}
+
+	serviceRaw := strings.TrimSpace(req.Service)
+	serviceNormalized := strings.ToLower(serviceRaw)
+
+	normalizedReq := req
+	if serviceNormalized == "youtube" || isBuiltInProvider(serviceNormalized) {
+		normalizedReq.Service = serviceNormalized
+	}
+
+	normalizedBytes, err := json.Marshal(normalizedReq)
+	if err != nil {
+		return errorResponse("Invalid request: " + err.Error())
+	}
+	normalizedJSON := string(normalizedBytes)
+
+	if serviceNormalized == "youtube" {
+		return DownloadFromYouTube(normalizedJSON)
+	}
+
+	if req.UseExtensions {
+		resp, err := DownloadWithExtensionsJSON(normalizedJSON)
+		if err != nil {
+			return errorResponse(err.Error())
+		}
+		return resp, nil
+	}
+
+	if req.UseFallback {
+		return DownloadWithFallback(normalizedJSON)
+	}
+
+	return DownloadTrack(normalizedJSON)
+}
+
 func DownloadWithFallback(requestJSON string) (string, error) {
 	var req DownloadRequest
 	if err := json.Unmarshal([]byte(requestJSON), &req); err != nil {
@@ -440,17 +559,18 @@ func DownloadWithFallback(requestJSON string) (string, error) {
 			amazonResult, amazonErr := downloadFromAmazon(req)
 			if amazonErr == nil {
 				result = DownloadResult{
-					FilePath:    amazonResult.FilePath,
+					FilePath:      amazonResult.FilePath,
-					BitDepth:    amazonResult.BitDepth,
+					BitDepth:      amazonResult.BitDepth,
-					SampleRate:  amazonResult.SampleRate,
+					SampleRate:    amazonResult.SampleRate,
-					Title:       amazonResult.Title,
+					Title:         amazonResult.Title,
-					Artist:      amazonResult.Artist,
+					Artist:        amazonResult.Artist,
-					Album:       amazonResult.Album,
+					Album:         amazonResult.Album,
-					ReleaseDate: amazonResult.ReleaseDate,
+					ReleaseDate:   amazonResult.ReleaseDate,
-					TrackNumber: amazonResult.TrackNumber,
+					TrackNumber:   amazonResult.TrackNumber,
-					DiscNumber:  amazonResult.DiscNumber,
+					DiscNumber:    amazonResult.DiscNumber,
-					ISRC:        amazonResult.ISRC,
+					ISRC:          amazonResult.ISRC,
-					LyricsLRC:   amazonResult.LyricsLRC,
+					LyricsLRC:     amazonResult.LyricsLRC,
+					DecryptionKey: amazonResult.DecryptionKey,
 				}
 			} else if !errors.Is(amazonErr, ErrDownloadCancelled) {
 				GoLog("[DownloadWithFallback] Amazon error: %v\n", amazonErr)
@@ -470,23 +590,14 @@ func DownloadWithFallback(requestJSON string) (string, error) {
 					result.BitDepth = quality.BitDepth
 					result.SampleRate = quality.SampleRate
 				}
-				resp := DownloadResponse{
+				resp := buildDownloadSuccessResponse(
-					Success:          true,
+					req,
-					Message:          "File already exists",
+					result,
-					FilePath:         actualPath,
+					service,
-					AlreadyExists:    true,
+					"File already exists",
-					ActualBitDepth:   result.BitDepth,
+					actualPath,
-					ActualSampleRate: result.SampleRate,
+					true,
-					Service:          service,
+				)
-					Title:            result.Title,
-					Artist:           result.Artist,
-					Album:            result.Album,
-					ReleaseDate:      result.ReleaseDate,
-					TrackNumber:      result.TrackNumber,
-					DiscNumber:       result.DiscNumber,
-					ISRC:             result.ISRC,
-					LyricsLRC:        result.LyricsLRC,
-				}
 				jsonBytes, _ := json.Marshal(resp)
 				return string(jsonBytes), nil
 			}
@@ -500,22 +611,14 @@ func DownloadWithFallback(requestJSON string) (string, error) {
 				GoLog("[Download] Could not read quality from file: %v\n", qErr)
 			}
 
-			resp := DownloadResponse{
+			resp := buildDownloadSuccessResponse(
-				Success:          true,
+				req,
-				Message:          "Downloaded from " + service,
+				result,
-				FilePath:         result.FilePath,
+				service,
-				ActualBitDepth:   result.BitDepth,
+				"Downloaded from "+service,
-				ActualSampleRate: result.SampleRate,
+				result.FilePath,
-				Service:          service,
+				false,
-				Title:            result.Title,
+			)
-				Artist:           result.Artist,
-				Album:            result.Album,
-				ReleaseDate:      result.ReleaseDate,
-				TrackNumber:      result.TrackNumber,
-				DiscNumber:       result.DiscNumber,
-				ISRC:             result.ISRC,
-				LyricsLRC:        result.LyricsLRC,
-			}
 			jsonBytes, _ := json.Marshal(resp)
 			return string(jsonBytes), nil
 		}
@@ -622,6 +725,7 @@ func ReadFileMetadata(filePath string) (string, error) {
 			result["track_number"] = meta.TrackNumber
 			result["disc_number"] = meta.DiscNumber
 			result["isrc"] = meta.ISRC
+			result["lyrics"] = meta.Lyrics
 			result["genre"] = meta.Genre
 			result["composer"] = meta.Composer
 			result["comment"] = meta.Comment
@@ -646,6 +750,7 @@ func ReadFileMetadata(filePath string) (string, error) {
 			result["track_number"] = meta.TrackNumber
 			result["disc_number"] = meta.DiscNumber
 			result["isrc"] = meta.ISRC
+			result["lyrics"] = meta.Lyrics
 			result["genre"] = meta.Genre
 			result["composer"] = meta.Composer
 			result["comment"] = meta.Comment
@@ -678,6 +783,7 @@ func EditFileMetadata(filePath, metadataJSON string) (string, error) {
 
 	lower := strings.ToLower(filePath)
 	isFlac := strings.HasSuffix(lower, ".flac")
+	coverPath := strings.TrimSpace(fields["cover_path"])
 
 	if isFlac {
 		trackNum := 0
@@ -705,7 +811,7 @@ func EditFileMetadata(filePath, metadataJSON string) (string, error) {
 			Comment:     fields["comment"],
 		}
 
-		if err := EmbedMetadata(filePath, meta, ""); err != nil {
+		if err := EmbedMetadata(filePath, meta, coverPath); err != nil {
 			return "", fmt.Errorf("failed to write FLAC metadata: %w", err)
 		}
 
@@ -1101,9 +1207,12 @@ func GetSpotifyMetadataWithDeezerFallback(spotifyURL string) (string, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
 	defer cancel()
 
+	var spotifyErr error
+
 	client, err := NewSpotifyMetadataClient()
 	if err != nil {
 		LogWarn("Spotify", "Credentials not configured, falling back to Deezer")
+		spotifyErr = err
 	} else {
 		data, err := client.GetFilteredData(ctx, spotifyURL, false, 0)
 		if err == nil {
@@ -1114,28 +1223,81 @@ func GetSpotifyMetadataWithDeezerFallback(spotifyURL string) (string, error) {
 			return string(jsonBytes), nil
 		}
 
-		errStr := strings.ToLower(err.Error())
+		spotifyErr = err
-		if !strings.Contains(errStr, "429") && !strings.Contains(errStr, "rate") && !strings.Contains(errStr, "limit") {
+		if !shouldTrySpotFetchFallback(err) {
 			return "", err
 		}
 	}
 
+	spotFetchData, apiErr := GetSpotifyDataWithAPI(ctx, spotifyURL, DefaultSpotFetchAPIBaseURL)
+	if apiErr == nil {
+		GoLog("[Fallback] Spotify metadata fetched via SpotFetch API\n")
+		jsonBytes, err := json.Marshal(spotFetchData)
+		if err != nil {
+			return "", err
+		}
+		return string(jsonBytes), nil
+	}
+	GoLog("[Fallback] SpotFetch API fallback failed: %v\n", apiErr)
+
 	parsed, parseErr := parseSpotifyURI(spotifyURL)
 	if parseErr != nil {
-		return "", fmt.Errorf("spotify rate limited and failed to parse URL: %w", parseErr)
+		if spotifyErr != nil {
+			return "", fmt.Errorf("spotify failed (%v), SpotFetch fallback failed (%v), and URL parsing failed: %w", spotifyErr, apiErr, parseErr)
+		}
+		return "", fmt.Errorf("SpotFetch fallback failed (%v) and URL parsing failed: %w", apiErr, parseErr)
 	}
 
-	GoLog("[Fallback] Spotify rate limited for %s, trying Deezer...\n", parsed.Type)
+	GoLog("[Fallback] Trying Deezer conversion fallback for %s...\n", parsed.Type)
 
 	if parsed.Type == "track" || parsed.Type == "album" {
 		return ConvertSpotifyToDeezer(parsed.Type, parsed.ID)
 	}
 
 	if parsed.Type == "artist" {
-		return "", fmt.Errorf("spotify rate limited. Artist pages require Spotify API - please try again later")
+		if spotifyErr != nil {
+			return "", fmt.Errorf("spotify metadata unavailable (%v) and SpotFetch fallback failed (%v). Artist pages require Spotify/SpotFetch API", spotifyErr, apiErr)
+		}
+		return "", fmt.Errorf("SpotFetch fallback failed (%v). Artist pages require Spotify/SpotFetch API", apiErr)
 	}
 
-	return "", fmt.Errorf("spotify rate limited. Playlists are user-specific and require Spotify API")
+	if spotifyErr != nil {
+		return "", fmt.Errorf("spotify metadata unavailable (%v), SpotFetch fallback failed (%v), and Deezer conversion is unavailable for playlists", spotifyErr, apiErr)
+	}
+	return "", fmt.Errorf("SpotFetch fallback failed (%v), and Deezer conversion is unavailable for playlists", apiErr)
+}
+
+func shouldTrySpotFetchFallback(err error) bool {
+	if err == nil {
+		return false
+	}
+	if errors.Is(err, ErrNoSpotifyCredentials) {
+		return true
+	}
+
+	errStr := strings.ToLower(err.Error())
+	indicators := []string{
+		"429",
+		"rate",
+		"limit",
+		"403",
+		"forbidden",
+		"401",
+		"unauthorized",
+		"timeout",
+		"connection",
+		"spotify error",
+		"access token",
+		"client token",
+		"eof",
+	}
+
+	for _, indicator := range indicators {
+		if strings.Contains(errStr, indicator) {
+			return true
+		}
+	}
+	return false
 }
 
 func CheckAvailabilityFromDeezerID(deezerTrackID string) (string, error) {
@@ -1266,6 +1428,10 @@ func DownloadFromYouTube(requestJSON string) (string, error) {
 		DiscNumber:  youtubeResult.DiscNumber,
 		ISRC:        youtubeResult.ISRC,
 		LyricsLRC:   youtubeResult.LyricsLRC,
+		CoverURL:    req.CoverURL,
+		Genre:       req.Genre,
+		Label:       req.Label,
+		Copyright:   req.Copyright,
 	}
 
 	jsonBytes, _ := json.Marshal(resp)
@@ -1528,19 +1694,47 @@ func ReEnrichFile(requestJSON string) (string, error) {
 	GoLog("[ReEnrich] track=%d, disc=%d, date=%s, isrc=%s, genre=%s, label=%s\n",
 		req.TrackNumber, req.DiscNumber, req.ReleaseDate, req.ISRC, req.Genre, req.Label)
 
+	lower := strings.ToLower(req.FilePath)
+	isFlac := strings.HasSuffix(lower, ".flac")
+
 	// Download cover art to temp file
 	var coverTempPath string
+	var coverDataBytes []byte
 	if req.CoverURL != "" {
 		coverData, err := downloadCoverToMemory(req.CoverURL, req.MaxQuality)
 		if err != nil {
 			GoLog("[ReEnrich] Failed to download cover: %v\n", err)
 		} else {
-			tmpFile, err := os.CreateTemp("", "reenrich_cover_*.jpg")
+			coverDataBytes = coverData
-			if err == nil {
+			GoLog("[ReEnrich] Cover downloaded: %d KB\n", len(coverData)/1024)
-				coverTempPath = tmpFile.Name()
+			// MP3/Opus requires a real image file path for Dart FFmpeg.
-				tmpFile.Write(coverData)
+			// FLAC uses in-memory embed and does not require temp files.
-				tmpFile.Close()
+			if !isFlac {
-				GoLog("[ReEnrich] Cover downloaded: %d KB\n", len(coverData)/1024)
+				tmpFile, err := os.CreateTemp("", "reenrich_cover_*.jpg")
+				if err != nil {
+					fallbackDir := filepath.Dir(req.FilePath)
+					if fallbackDir == "" || fallbackDir == "." {
+						GoLog("[ReEnrich] Failed to create cover temp file: %v\n", err)
+					} else {
+						tmpFile, err = os.CreateTemp(fallbackDir, "reenrich_cover_*.jpg")
+						if err != nil {
+							GoLog("[ReEnrich] Failed to create cover temp file (fallback dir %s): %v\n", fallbackDir, err)
+						}
+					}
+				}
+				if err == nil && tmpFile != nil {
+					coverTempPath = tmpFile.Name()
+					if _, writeErr := tmpFile.Write(coverData); writeErr != nil {
+						GoLog("[ReEnrich] Failed writing cover temp file: %v\n", writeErr)
+						tmpFile.Close()
+						os.Remove(coverTempPath)
+						coverTempPath = ""
+					} else if closeErr := tmpFile.Close(); closeErr != nil {
+						GoLog("[ReEnrich] Failed closing cover temp file: %v\n", closeErr)
+						os.Remove(coverTempPath)
+						coverTempPath = ""
+					}
+				}
 			}
 		}
 	}
@@ -1570,9 +1764,6 @@ func ReEnrichFile(requestJSON string) (string, error) {
 		}
 	}
 
-	lower := strings.ToLower(req.FilePath)
-	isFlac := strings.HasSuffix(lower, ".flac")
-
 	// Build enriched metadata response for Dart (includes online search results)
 	enrichedMeta := map[string]interface{}{
 		"track_name":   req.TrackName,
@@ -1608,8 +1799,24 @@ func ReEnrichFile(requestJSON string) (string, error) {
 			Lyrics:      lyricsLRC,
 		}
 
-		if err := EmbedMetadata(req.FilePath, metadata, coverTempPath); err != nil {
+		if len(coverDataBytes) > 0 {
-			return "", fmt.Errorf("failed to embed metadata: %w", err)
+			if err := EmbedMetadataWithCoverData(req.FilePath, metadata, coverDataBytes); err != nil {
+				return "", fmt.Errorf("failed to embed metadata with cover: %w", err)
+			}
+		} else {
+			if err := EmbedMetadata(req.FilePath, metadata, ""); err != nil {
+				return "", fmt.Errorf("failed to embed metadata: %w", err)
+			}
+		}
+		if len(coverDataBytes) > 0 {
+			embeddedCover, err := ExtractCoverArt(req.FilePath)
+			if err != nil || len(embeddedCover) == 0 {
+				if err != nil {
+					return "", fmt.Errorf("metadata embedded but cover verification failed: %w", err)
+				}
+				return "", fmt.Errorf("metadata embedded but cover verification failed: empty embedded cover")
+			}
+			GoLog("[ReEnrich] Cover verified after embed (%d bytes)\n", len(embeddedCover))
 		}
 
 		GoLog("[ReEnrich] FLAC metadata embedded successfully\n")
@@ -2699,14 +2906,26 @@ func GetStoreCategoriesJSON() (string, error) {
 	return string(jsonBytes), nil
 }
 
+func buildStoreExtensionDestPath(destDir, extensionID string) (string, error) {
+	if strings.TrimSpace(extensionID) == "" {
+		return "", fmt.Errorf("invalid extension id")
+	}
+
+	safeExtensionID := sanitizeFilename(extensionID)
+	return filepath.Join(destDir, safeExtensionID+".spotiflac-ext"), nil
+}
+
 func DownloadStoreExtensionJSON(extensionID, destDir string) (string, error) {
 	store := GetExtensionStore()
 	if store == nil {
 		return "", fmt.Errorf("extension store not initialized")
 	}
 
-	destPath := fmt.Sprintf("%s/%s.spotiflac-ext", destDir, extensionID)
+	destPath, err := buildStoreExtensionDestPath(destDir, extensionID)
-	err := store.DownloadExtension(extensionID, destPath)
+	if err != nil {
+		return "", err
+	}
+	err = store.DownloadExtension(extensionID, destPath)
 	if err != nil {
 		return "", err
 	}

go_backend/extension_providers.go

@@ -1082,16 +1082,18 @@ func tryBuiltInProvider(providerID string, req DownloadRequest) (*DownloadRespon
 		amazonResult, amazonErr := downloadFromAmazon(req)
 		if amazonErr == nil {
 			result = DownloadResult{
-				FilePath:    amazonResult.FilePath,
+				FilePath:      amazonResult.FilePath,
-				BitDepth:    amazonResult.BitDepth,
+				BitDepth:      amazonResult.BitDepth,
-				SampleRate:  amazonResult.SampleRate,
+				SampleRate:    amazonResult.SampleRate,
-				Title:       amazonResult.Title,
+				Title:         amazonResult.Title,
-				Artist:      amazonResult.Artist,
+				Artist:        amazonResult.Artist,
-				Album:       amazonResult.Album,
+				Album:         amazonResult.Album,
-				ReleaseDate: amazonResult.ReleaseDate,
+				ReleaseDate:   amazonResult.ReleaseDate,
-				TrackNumber: amazonResult.TrackNumber,
+				TrackNumber:   amazonResult.TrackNumber,
-				DiscNumber:  amazonResult.DiscNumber,
+				DiscNumber:    amazonResult.DiscNumber,
-				ISRC:        amazonResult.ISRC,
+				ISRC:          amazonResult.ISRC,
+				LyricsLRC:     amazonResult.LyricsLRC,
+				DecryptionKey: amazonResult.DecryptionKey,
 			}
 		}
 		err = amazonErr
@@ -1119,6 +1121,8 @@ func tryBuiltInProvider(providerID string, req DownloadRequest) (*DownloadRespon
 		Genre:            req.Genre,
 		Label:            req.Label,
 		Copyright:        req.Copyright,
+		LyricsLRC:        result.LyricsLRC,
+		DecryptionKey:    result.DecryptionKey,
 	}, nil
 }
 
@@ -1164,16 +1168,30 @@ func (p *ExtensionProviderWrapper) CustomSearch(query string, options map[string
 	p.extension.VMMu.Lock()
 	defer p.extension.VMMu.Unlock()
 
-	optionsJSON, _ := json.Marshal(options)
+	if options == nil {
+		options = map[string]interface{}{}
+	}
 
-	script := fmt.Sprintf(`
+	// Avoid embedding user input directly into JS source. Some inputs can trigger
+	// parser/runtime edge cases on specific devices/Goja builds.
+	const queryVar = "__sf_custom_search_query"
+	const optionsVar = "__sf_custom_search_options"
+	global := p.vm.GlobalObject()
+	_ = global.Set(queryVar, query)
+	_ = global.Set(optionsVar, options)
+	defer func() {
+		global.Delete(queryVar)
+		global.Delete(optionsVar)
+	}()
+
+	const script = `
 		(function() {
 			if (typeof extension !== 'undefined' && typeof extension.customSearch === 'function') {
-				return extension.customSearch(%q, %s);
+				return extension.customSearch(__sf_custom_search_query, __sf_custom_search_options);
 			}
 			return null;
 		})()
-	`, query, string(optionsJSON))
+	`
 
 	result, err := RunWithTimeoutAndRecover(p.vm, script, DefaultJSTimeout)
 	if err != nil {
@@ -1358,12 +1376,12 @@ type PostProcessResult struct {
 }
 
 type PostProcessInput struct {
-	Path    string `json:"path,omitempty"`
+	Path     string `json:"path,omitempty"`
-	URI     string `json:"uri,omitempty"`
+	URI      string `json:"uri,omitempty"`
-	Name    string `json:"name,omitempty"`
+	Name     string `json:"name,omitempty"`
 	MimeType string `json:"mime_type,omitempty"`
-	Size    int64  `json:"size,omitempty"`
+	Size     int64  `json:"size,omitempty"`
-	IsSAF   bool   `json:"is_saf,omitempty"`
+	IsSAF    bool   `json:"is_saf,omitempty"`
 }
 
 const PostProcessTimeout = 2 * time.Minute

go_backend/extension_runtime_auth.go

@@ -18,6 +18,43 @@ import (
 
 // ==================== Auth API (OAuth Support) ====================
 
+func validateExtensionAuthURL(urlStr string) error {
+	parsed, err := url.Parse(urlStr)
+	if err != nil {
+		return fmt.Errorf("invalid auth URL: %w", err)
+	}
+
+	if parsed.Scheme != "https" {
+		return fmt.Errorf("invalid auth URL: only https is allowed")
+	}
+
+	host := parsed.Hostname()
+	if host == "" {
+		return fmt.Errorf("invalid auth URL: hostname is required")
+	}
+
+	if parsed.User != nil {
+		return fmt.Errorf("invalid auth URL: embedded credentials are not allowed")
+	}
+
+	if isPrivateIP(host) {
+		return fmt.Errorf("invalid auth URL: private/local network is not allowed")
+	}
+
+	return nil
+}
+
+func summarizeURLForLog(urlStr string) string {
+	parsed, err := url.Parse(urlStr)
+	if err != nil {
+		return urlStr
+	}
+	if parsed.Host == "" {
+		return parsed.Scheme + "://"
+	}
+	return fmt.Sprintf("%s://%s%s", parsed.Scheme, parsed.Host, parsed.Path)
+}
+
 func (r *ExtensionRuntime) authOpenUrl(call goja.FunctionCall) goja.Value {
 	if len(call.Arguments) < 1 {
 		return r.vm.ToValue(map[string]interface{}{
@@ -32,6 +69,13 @@ func (r *ExtensionRuntime) authOpenUrl(call goja.FunctionCall) goja.Value {
 		callbackURL = call.Arguments[1].String()
 	}
 
+	if err := validateExtensionAuthURL(authURL); err != nil {
+		return r.vm.ToValue(map[string]interface{}{
+			"success": false,
+			"error":   err.Error(),
+		})
+	}
+
 	pendingAuthRequestsMu.Lock()
 	pendingAuthRequests[r.extensionID] = &PendingAuthRequest{
 		ExtensionID: r.extensionID,
@@ -50,7 +94,7 @@ func (r *ExtensionRuntime) authOpenUrl(call goja.FunctionCall) goja.Value {
 	state.AuthCode = ""
 	extensionAuthStateMu.Unlock()
 
-	GoLog("[Extension:%s] Auth URL requested: %s\n", r.extensionID, authURL)
+	GoLog("[Extension:%s] Auth URL requested: %s\n", r.extensionID, summarizeURLForLog(authURL))
 
 	return r.vm.ToValue(map[string]interface{}{
 		"success": true,
@@ -273,6 +317,12 @@ func (r *ExtensionRuntime) authStartOAuthWithPKCE(call goja.FunctionCall) goja.V
 			"error":   "authUrl, clientId, and redirectUri are required",
 		})
 	}
+	if err := validateExtensionAuthURL(authURL); err != nil {
+		return r.vm.ToValue(map[string]interface{}{
+			"success": false,
+			"error":   err.Error(),
+		})
+	}
 
 	scope, _ := config["scope"].(string)
 	extraParams, _ := config["extraParams"].(map[string]interface{})
@@ -331,7 +381,7 @@ func (r *ExtensionRuntime) authStartOAuthWithPKCE(call goja.FunctionCall) goja.V
 	}
 	pendingAuthRequestsMu.Unlock()
 
-	GoLog("[Extension:%s] PKCE OAuth started: %s\n", r.extensionID, fullAuthURL)
+	GoLog("[Extension:%s] PKCE OAuth started: %s\n", r.extensionID, summarizeURLForLog(fullAuthURL))
 
 	return r.vm.ToValue(map[string]interface{}{
 		"success": true,
@@ -441,13 +491,17 @@ func (r *ExtensionRuntime) authExchangeCodeWithPKCE(call goja.FunctionCall) goja
 			"error":   err.Error(),
 		})
 	}
+	bodyPreview := sanitizeSensitiveLogText(string(body))
+	if len(bodyPreview) > 1000 {
+		bodyPreview = bodyPreview[:1000] + "...[truncated]"
+	}
 
 	var tokenResp map[string]interface{}
 	if err := json.Unmarshal(body, &tokenResp); err != nil {
 		return r.vm.ToValue(map[string]interface{}{
 			"success": false,
 			"error":   fmt.Sprintf("failed to parse token response: %v", err),
-			"body":    string(body),
+			"body":    bodyPreview,
 		})
 	}
 
@@ -468,7 +522,7 @@ func (r *ExtensionRuntime) authExchangeCodeWithPKCE(call goja.FunctionCall) goja
 		return r.vm.ToValue(map[string]interface{}{
 			"success": false,
 			"error":   "no access_token in response",
-			"body":    string(body),
+			"body":    bodyPreview,
 		})
 	}
 

go_backend/extension_runtime_http.go

@@ -32,6 +32,9 @@ func (r *ExtensionRuntime) validateDomain(urlStr string) error {
 	if parsed.Scheme != "https" {
 		return fmt.Errorf("network access denied: only https is allowed")
 	}
+	if parsed.User != nil {
+		return fmt.Errorf("invalid URL: embedded credentials are not allowed")
+	}
 
 	domain := parsed.Hostname()
 	if domain == "" {

go_backend/extension_runtime_storage.go

@@ -46,7 +46,7 @@ func (r *ExtensionRuntime) saveStorage(storage map[string]interface{}) error {
 		return err
 	}
 
-	return os.WriteFile(storagePath, data, 0644)
+	return os.WriteFile(storagePath, data, 0600)
 }
 
 func (r *ExtensionRuntime) storageGet(call goja.FunctionCall) goja.Value {

go_backend/extension_timeout.go

@@ -4,6 +4,7 @@ package gobackend
 import (
 	"context"
 	"fmt"
+	"runtime/debug"
 	"sync"
 	"time"
 
@@ -49,6 +50,7 @@ func RunWithTimeout(vm *goja.Runtime, script string, timeout time.Duration) (goj
 						IsTimeout: true,
 					}}
 				} else {
+					GoLog("[ExtensionRuntime] panic during JS execution: %v\n%s\n", r, string(debug.Stack()))
 					resultCh <- result{nil, fmt.Errorf("panic during execution: %v", r)}
 				}
 			}

go_backend/logbuffer.go

@@ -3,6 +3,7 @@ package gobackend
 import (
 	"encoding/json"
 	"fmt"
+	"regexp"
 	"strings"
 	"sync"
 	"time"
@@ -30,8 +31,22 @@ const (
 var (
 	globalLogBuffer *LogBuffer
 	logBufferOnce   sync.Once
+
+	authorizationBearerPattern = regexp.MustCompile(`(?i)\bAuthorization\b\s*[:=]\s*Bearer\s+[A-Za-z0-9._~+/\-]+=*`)
+	genericKeyValuePattern     = regexp.MustCompile(`(?i)\b(access[_\s-]?token|refresh[_\s-]?token|id[_\s-]?token|client[_\s-]?secret|authorization|password|api[_\s-]?key)\b(\s*[:=]\s*)([^\s,;]+)`)
+	queryTokenPattern          = regexp.MustCompile(`(?i)([?&](?:access_token|refresh_token|id_token|token|client_secret|api_key|apikey|password)=)[^&\s]+`)
+	bearerTokenPattern         = regexp.MustCompile(`(?i)\bBearer\s+[A-Za-z0-9._~+/\-]+=*`)
 )
 
+func sanitizeSensitiveLogText(message string) string {
+	redacted := message
+	redacted = authorizationBearerPattern.ReplaceAllString(redacted, "Authorization: Bearer [REDACTED]")
+	redacted = genericKeyValuePattern.ReplaceAllString(redacted, `${1}${2}[REDACTED]`)
+	redacted = queryTokenPattern.ReplaceAllString(redacted, `${1}[REDACTED]`)
+	redacted = bearerTokenPattern.ReplaceAllString(redacted, "Bearer [REDACTED]")
+	return redacted
+}
+
 func GetLogBuffer() *LogBuffer {
 	logBufferOnce.Do(func() {
 		globalLogBuffer = &LogBuffer{
@@ -71,6 +86,7 @@ func (lb *LogBuffer) Add(level, tag, message string) {
 		return
 	}
 
+	message = sanitizeSensitiveLogText(message)
 	message = truncateLogMessage(message)
 
 	entry := LogEntry{

go_backend/metadata.go

@@ -4,8 +4,13 @@ import (
 	"bytes"
 	"encoding/binary"
 	"fmt"
+	stdimage "image"
+	_ "image/gif"
+	_ "image/jpeg"
+	_ "image/png"
 	"io"
 	"os"
+	"path/filepath"
 	"strconv"
 	"strings"
 
@@ -14,6 +19,82 @@ import (
 	"github.com/go-flac/go-flac/v2"
 )
 
+func detectCoverMIME(coverPath string, coverData []byte) string {
+	// Prefer magic-byte detection over file extension.
+	// Some providers return non-JPEG data behind .jpg URLs.
+	if len(coverData) >= 8 &&
+		coverData[0] == 0x89 &&
+		coverData[1] == 0x50 &&
+		coverData[2] == 0x4E &&
+		coverData[3] == 0x47 &&
+		coverData[4] == 0x0D &&
+		coverData[5] == 0x0A &&
+		coverData[6] == 0x1A &&
+		coverData[7] == 0x0A {
+		return "image/png"
+	}
+	if len(coverData) >= 3 &&
+		coverData[0] == 0xFF &&
+		coverData[1] == 0xD8 &&
+		coverData[2] == 0xFF {
+		return "image/jpeg"
+	}
+	if len(coverData) >= 6 {
+		header := string(coverData[:6])
+		if header == "GIF87a" || header == "GIF89a" {
+			return "image/gif"
+		}
+	}
+	if len(coverData) >= 12 &&
+		string(coverData[:4]) == "RIFF" &&
+		string(coverData[8:12]) == "WEBP" {
+		return "image/webp"
+	}
+
+	switch strings.ToLower(filepath.Ext(strings.TrimSpace(coverPath))) {
+	case ".png":
+		return "image/png"
+	case ".jpg", ".jpeg":
+		return "image/jpeg"
+	case ".webp":
+		return "image/webp"
+	case ".gif":
+		return "image/gif"
+	}
+
+	return "image/jpeg"
+}
+
+func buildPictureBlock(coverPath string, coverData []byte) (flac.MetaDataBlock, error) {
+	if len(coverData) == 0 {
+		return flac.MetaDataBlock{}, fmt.Errorf("empty cover data")
+	}
+
+	mime := detectCoverMIME(coverPath, coverData)
+	picture := &flacpicture.MetadataBlockPicture{
+		PictureType: flacpicture.PictureTypeFrontCover,
+		MIME:        mime,
+		Description: "Front Cover",
+		ImageData:   coverData,
+	}
+
+	// Width/height/depth are optional in practice; keep zero when decode fails.
+	if cfg, format, err := stdimage.DecodeConfig(bytes.NewReader(coverData)); err == nil {
+		picture.Width = uint32(cfg.Width)
+		picture.Height = uint32(cfg.Height)
+		switch format {
+		case "png":
+			picture.ColorDepth = 32
+		case "jpeg":
+			picture.ColorDepth = 24
+		default:
+			picture.ColorDepth = 0
+		}
+	}
+
+	return picture.Marshal(), nil
+}
+
 type Metadata struct {
 	Title       string
 	Artist      string
@@ -127,19 +208,12 @@ func EmbedMetadata(filePath string, metadata Metadata, coverPath string) error {
 					}
 				}
 
-				picture, err := flacpicture.NewFromImageData(
+				picBlock, err := buildPictureBlock(coverPath, coverData)
-					flacpicture.PictureTypeFrontCover,
-					"Front Cover",
-					coverData,
-					"image/jpeg",
-				)
 				if err != nil {
-					fmt.Printf("[Metadata] Warning: Failed to create picture block: %v\n", err)
+					return fmt.Errorf("failed to create picture block: %w", err)
-				} else {
-					picBlock := picture.Marshal()
-					f.Meta = append(f.Meta, &picBlock)
-					fmt.Printf("[Metadata] Cover art embedded successfully (%d bytes)\n", len(coverData))
 				}
+				f.Meta = append(f.Meta, &picBlock)
+				fmt.Printf("[Metadata] Cover art embedded successfully (%d bytes)\n", len(coverData))
 			}
 		} else {
 			fmt.Printf("[Metadata] Warning: Cover file does not exist: %s\n", coverPath)
@@ -238,19 +312,12 @@ func EmbedMetadataWithCoverData(filePath string, metadata Metadata, coverData []
 			}
 		}
 
-		picture, err := flacpicture.NewFromImageData(
+		picBlock, err := buildPictureBlock("", coverData)
-			flacpicture.PictureTypeFrontCover,
-			"Front Cover",
-			coverData,
-			"image/jpeg",
-		)
 		if err != nil {
-			fmt.Printf("[Metadata] Warning: Failed to create picture block: %v\n", err)
+			return fmt.Errorf("failed to create picture block: %w", err)
-		} else {
-			picBlock := picture.Marshal()
-			f.Meta = append(f.Meta, &picBlock)
-			fmt.Printf("[Metadata] Cover art embedded successfully (%d bytes)\n", len(coverData))
 		}
+		f.Meta = append(f.Meta, &picBlock)
+		fmt.Printf("[Metadata] Cover art embedded successfully (%d bytes)\n", len(coverData))
 	}
 
 	return f.Save(filePath)
@@ -475,33 +542,91 @@ func EmbedGenreLabel(filePath string, genre, label string) error {
 }
 
 func ExtractLyrics(filePath string) (string, error) {
+	lower := strings.ToLower(filePath)
+
+	if strings.HasSuffix(lower, ".flac") {
+		return extractLyricsFromFlac(filePath)
+	}
+
+	if strings.HasSuffix(lower, ".mp3") {
+		meta, err := ReadID3Tags(filePath)
+		if err != nil || meta == nil {
+			return "", fmt.Errorf("no lyrics found in file")
+		}
+		if strings.TrimSpace(meta.Lyrics) != "" {
+			return meta.Lyrics, nil
+		}
+		if looksLikeEmbeddedLyrics(meta.Comment) {
+			return meta.Comment, nil
+		}
+		return "", fmt.Errorf("no lyrics found in file")
+	}
+
+	if strings.HasSuffix(lower, ".opus") || strings.HasSuffix(lower, ".ogg") {
+		meta, err := ReadOggVorbisComments(filePath)
+		if err != nil || meta == nil {
+			return "", fmt.Errorf("no lyrics found in file")
+		}
+		if strings.TrimSpace(meta.Lyrics) != "" {
+			return meta.Lyrics, nil
+		}
+		if looksLikeEmbeddedLyrics(meta.Comment) {
+			return meta.Comment, nil
+		}
+		return "", fmt.Errorf("no lyrics found in file")
+	}
+
+	return "", fmt.Errorf("unsupported file format for lyrics extraction")
+}
+
+func extractLyricsFromFlac(filePath string) (string, error) {
 	f, err := flac.ParseFile(filePath)
 	if err != nil {
 		return "", fmt.Errorf("failed to parse FLAC file: %w", err)
 	}
 
 	for _, meta := range f.Meta {
-		if meta.Type == flac.VorbisComment {
+		if meta.Type != flac.VorbisComment {
-			cmt, err := flacvorbis.ParseFromMetaDataBlock(*meta)
+			continue
-			if err != nil {
+		}
-				continue
-			}
 
-			lyrics, err := cmt.Get("LYRICS")
+		cmt, err := flacvorbis.ParseFromMetaDataBlock(*meta)
-			if err == nil && len(lyrics) > 0 && lyrics[0] != "" {
+		if err != nil {
-				return lyrics[0], nil
+			continue
-			}
+		}
 
-			lyrics, err = cmt.Get("UNSYNCEDLYRICS")
+		lyrics, err := cmt.Get("LYRICS")
-			if err == nil && len(lyrics) > 0 && lyrics[0] != "" {
+		if err == nil && len(lyrics) > 0 && strings.TrimSpace(lyrics[0]) != "" {
-				return lyrics[0], nil
+			return lyrics[0], nil
-			}
+		}
+
+		lyrics, err = cmt.Get("UNSYNCEDLYRICS")
+		if err == nil && len(lyrics) > 0 && strings.TrimSpace(lyrics[0]) != "" {
+			return lyrics[0], nil
 		}
 	}
 
 	return "", fmt.Errorf("no lyrics found in file")
 }
 
+func looksLikeEmbeddedLyrics(value string) bool {
+	trimmed := strings.TrimSpace(value)
+	if trimmed == "" {
+		return false
+	}
+
+	lower := strings.ToLower(trimmed)
+	if strings.Contains(lower, "[ar:") || strings.Contains(lower, "[ti:") {
+		return true
+	}
+
+	if strings.Contains(trimmed, "\n") && strings.Contains(trimmed, "[") && strings.Contains(trimmed, "]") {
+		return true
+	}
+
+	return false
+}
+
 type AudioQuality struct {
 	BitDepth     int   `json:"bit_depth"`
 	SampleRate   int   `json:"sample_rate"`

go_backend/qobuz.go

@@ -419,7 +419,7 @@ func extractQobuzDownloadURLFromBody(body []byte) (string, error) {
 func (q *QobuzDownloader) downloadFromJumo(trackID int64, quality string) (string, error) {
 	formatID := mapJumoQuality(quality)
 	region := "US"
-	jumoURL := fmt.Sprintf("https://jumo-dl.pages.dev/file?track_id=%d&format_id=%d&region=%s", trackID, formatID, region)
+	jumoURL := fmt.Sprintf("https://jumo-dl.pages.dev/get?track_id=%d&format_id=%d&region=%s", trackID, formatID, region)
 
 	GoLog("[Qobuz] Trying Jumo API fallback...\n")
 
@@ -428,6 +428,8 @@ func (q *QobuzDownloader) downloadFromJumo(trackID int64, quality string) (strin
 	if err != nil {
 		return "", err
 	}
+	req.Header.Set("User-Agent", getRandomUserAgent())
+	req.Header.Set("Referer", "https://jumo-dl.pages.dev/")
 
 	resp, err := client.Do(req)
 	if err != nil {

go_backend/security_hardening_test.go

@@ -0,0 +1,80 @@
+package gobackend
+
+import (
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestSanitizeSensitiveLogText(t *testing.T) {
+	input := "access_token=abc123 Authorization:Bearer xyz456 https://api.example.com/cb?refresh_token=zzz"
+	redacted := sanitizeSensitiveLogText(input)
+
+	if strings.Contains(redacted, "abc123") || strings.Contains(redacted, "xyz456") || strings.Contains(redacted, "zzz") {
+		t.Fatalf("expected sensitive values to be redacted, got: %s", redacted)
+	}
+	if !strings.Contains(redacted, "[REDACTED]") {
+		t.Fatalf("expected redaction marker in output, got: %s", redacted)
+	}
+}
+
+func TestValidateExtensionAuthURL(t *testing.T) {
+	if err := validateExtensionAuthURL("https://accounts.example.com/oauth/authorize"); err != nil {
+		t.Fatalf("expected valid auth URL, got error: %v", err)
+	}
+
+	blocked := []string{
+		"http://accounts.example.com/oauth/authorize",
+		"https://user:pass@accounts.example.com/oauth/authorize",
+		"https://localhost/oauth/authorize",
+	}
+
+	for _, rawURL := range blocked {
+		if err := validateExtensionAuthURL(rawURL); err == nil {
+			t.Fatalf("expected URL to be blocked: %s", rawURL)
+		}
+	}
+}
+
+func TestValidateDomainRejectsEmbeddedCredentials(t *testing.T) {
+	ext := &LoadedExtension{
+		ID: "test-ext",
+		Manifest: &ExtensionManifest{
+			Name: "test-ext",
+			Permissions: ExtensionPermissions{
+				Network: []string{"api.example.com"},
+			},
+		},
+		DataDir: t.TempDir(),
+	}
+
+	runtime := NewExtensionRuntime(ext)
+	if err := runtime.validateDomain("https://user:pass@api.example.com/resource"); err == nil {
+		t.Fatal("expected embedded URL credentials to be rejected")
+	}
+}
+
+func TestBuildStoreExtensionDestPath(t *testing.T) {
+	baseDir := t.TempDir()
+
+	destPath, err := buildStoreExtensionDestPath(baseDir, "../evil/name")
+	if err != nil {
+		t.Fatalf("expected sanitized path to be generated, got error: %v", err)
+	}
+
+	if !isPathWithinBase(baseDir, destPath) {
+		t.Fatalf("expected destination path to remain under base dir: %s", destPath)
+	}
+
+	baseName := filepath.Base(destPath)
+	if strings.Contains(baseName, "/") || strings.Contains(baseName, `\`) {
+		t.Fatalf("expected filename to be sanitized, got: %s", baseName)
+	}
+	if !strings.HasSuffix(baseName, ".spotiflac-ext") {
+		t.Fatalf("expected .spotiflac-ext suffix, got: %s", baseName)
+	}
+
+	if _, err := buildStoreExtensionDestPath(baseDir, "   "); err == nil {
+		t.Fatal("expected empty extension id to be rejected")
+	}
+}

go_backend/spotfetch_api.go

@@ -0,0 +1,80 @@
+package gobackend
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"time"
+)
+
+const DefaultSpotFetchAPIBaseURL = "https://spotify.afkarxyz.fun/api"
+
+// GetSpotifyDataWithAPI fetches Spotify metadata through SpotFetch-compatible API.
+// This is used as a fallback when direct Spotify API access is blocked/limited.
+func GetSpotifyDataWithAPI(ctx context.Context, spotifyURL, apiBaseURL string) (interface{}, error) {
+	parsed, err := parseSpotifyURI(spotifyURL)
+	if err != nil {
+		return nil, fmt.Errorf("invalid Spotify URL: %w", err)
+	}
+
+	base := strings.TrimSpace(apiBaseURL)
+	if base == "" {
+		base = DefaultSpotFetchAPIBaseURL
+	}
+
+	endpoint := fmt.Sprintf("%s/%s/%s", strings.TrimSuffix(base, "/"), parsed.Type, parsed.ID)
+	req, err := http.NewRequestWithContext(ctx, "GET", endpoint, nil)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create SpotFetch API request: %w", err)
+	}
+	req.Header.Set("User-Agent", getRandomUserAgent())
+	req.Header.Set("Accept", "application/json")
+
+	client := NewHTTPClientWithTimeout(30 * time.Second)
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("SpotFetch API request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("SpotFetch API error: HTTP %d", resp.StatusCode)
+	}
+
+	bodyBytes, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read SpotFetch API response: %w", err)
+	}
+
+	switch parsed.Type {
+	case "track":
+		var trackResp TrackResponse
+		if err := json.Unmarshal(bodyBytes, &trackResp); err != nil {
+			return nil, fmt.Errorf("failed to decode track response: %w", err)
+		}
+		return trackResp, nil
+	case "album":
+		var albumResp AlbumResponsePayload
+		if err := json.Unmarshal(bodyBytes, &albumResp); err != nil {
+			return nil, fmt.Errorf("failed to decode album response: %w", err)
+		}
+		return &albumResp, nil
+	case "playlist":
+		var playlistResp PlaylistResponsePayload
+		if err := json.Unmarshal(bodyBytes, &playlistResp); err != nil {
+			return nil, fmt.Errorf("failed to decode playlist response: %w", err)
+		}
+		return playlistResp, nil
+	case "artist":
+		var artistResp ArtistResponsePayload
+		if err := json.Unmarshal(bodyBytes, &artistResp); err != nil {
+			return nil, fmt.Errorf("failed to decode artist response: %w", err)
+		}
+		return &artistResp, nil
+	default:
+		return nil, fmt.Errorf("unsupported Spotify type: %s", parsed.Type)
+	}
+}

lib/constants/app_info.dart

@@ -1,8 +1,8 @@
 /// App version and info constants
 /// Update version here only - all other files will reference this
 class AppInfo {
-  static const String version = '3.6.0';
+  static const String version = '3.6.5';
-  static const String buildNumber = '77';
+  static const String buildNumber = '79';
   static const String fullVersion = '$version+$buildNumber';
   
   
@@ -17,6 +17,5 @@ class AppInfo {
   static const String originalGithubUrl = 'https://github.com/afkarxyz/SpotiFLAC';
   
   static const String kofiUrl = 'https://ko-fi.com/zarzet';
-  static const String bmacUrl = 'https://buymeacoffee.com/zarzet';
   static const String githubSponsorsUrl = 'https://github.com/sponsors/zarzet/';
 }

lib/l10n/app_localizations.dart

@@ -928,18 +928,6 @@ abstract class AppLocalizations {
   /// **'Support'**
   String get aboutSupport;
 
-  /// Donation link
-  ///
-  /// In en, this message translates to:
-  /// **'Buy me a coffee'**
-  String get aboutBuyMeCoffee;
-
-  /// Subtitle for donation
-  ///
-  /// In en, this message translates to:
-  /// **'Support development on Ko-fi'**
-  String get aboutBuyMeCoffeeSubtitle;
-
   /// Section for app info
   ///
   /// In en, this message translates to:
@@ -3550,6 +3538,24 @@ abstract class AppLocalizations {
   /// **'Artist folders use Track Artist only'**
   String get downloadUseAlbumArtistForFoldersTrackSubtitle;
 
+  /// Setting - strip featured artists from folder name
+  ///
+  /// In en, this message translates to:
+  /// **'Primary artist only for folders'**
+  String get downloadUsePrimaryArtistOnly;
+
+  /// Subtitle when primary artist only is enabled
+  ///
+  /// In en, this message translates to:
+  /// **'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)'**
+  String get downloadUsePrimaryArtistOnlyEnabled;
+
+  /// Subtitle when primary artist only is disabled
+  ///
+  /// In en, this message translates to:
+  /// **'Full artist string used for folder name'**
+  String get downloadUsePrimaryArtistOnlyDisabled;
+
   /// Setting - output file format
   ///
   /// In en, this message translates to:
@@ -5062,6 +5068,12 @@ abstract class AppLocalizations {
   /// **'Fetch and save lyrics as .lrc file'**
   String get trackSaveLyricsSubtitle;
 
+  /// Snackbar while saving lyrics to file
+  ///
+  /// In en, this message translates to:
+  /// **'Saving lyrics...'**
+  String get trackSaveLyricsProgress;
+
   /// Menu action - re-embed metadata into audio file
   ///
   /// In en, this message translates to:
@@ -5133,6 +5145,70 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'Failed: {error}'**
   String trackSaveFailed(String error);
+
+  /// Menu item - convert audio format
+  ///
+  /// In en, this message translates to:
+  /// **'Convert Format'**
+  String get trackConvertFormat;
+
+  /// Subtitle for convert format menu item
+  ///
+  /// In en, this message translates to:
+  /// **'Convert to MP3 or Opus'**
+  String get trackConvertFormatSubtitle;
+
+  /// Title of convert bottom sheet
+  ///
+  /// In en, this message translates to:
+  /// **'Convert Audio'**
+  String get trackConvertTitle;
+
+  /// Label for format selection
+  ///
+  /// In en, this message translates to:
+  /// **'Target Format'**
+  String get trackConvertTargetFormat;
+
+  /// Label for bitrate selection
+  ///
+  /// In en, this message translates to:
+  /// **'Bitrate'**
+  String get trackConvertBitrate;
+
+  /// Confirmation dialog title
+  ///
+  /// In en, this message translates to:
+  /// **'Confirm Conversion'**
+  String get trackConvertConfirmTitle;
+
+  /// Confirmation dialog message
+  ///
+  /// In en, this message translates to:
+  /// **'Convert from {sourceFormat} to {targetFormat} at {bitrate}?\n\nThe original file will be deleted after conversion.'**
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  );
+
+  /// Snackbar while converting
+  ///
+  /// In en, this message translates to:
+  /// **'Converting audio...'**
+  String get trackConvertConverting;
+
+  /// Snackbar after successful conversion
+  ///
+  /// In en, this message translates to:
+  /// **'Converted to {format} successfully'**
+  String trackConvertSuccess(String format);
+
+  /// Snackbar when conversion fails
+  ///
+  /// In en, this message translates to:
+  /// **'Conversion failed'**
+  String get trackConvertFailed;
 }
 
 class _AppLocalizationsDelegate

lib/l10n/app_localizations_de.dart

@@ -469,13 +469,6 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get aboutSupport => 'Support';
 
-  @override
-  String get aboutBuyMeCoffee => 'Spendiere mir einen Kaffee';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle =>
-      'Unterstütze die Entwicklung auf Ko-fi';
-
   @override
   String get aboutApp => 'App';
 
@@ -1960,6 +1953,17 @@ class AppLocalizationsDe extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Artist folders use Track Artist only';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Primary artist only for folders';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Full artist string used for folder name';
+
   @override
   String get downloadSaveFormat => 'Save Format';
 
@@ -2861,6 +2865,9 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get trackSaveLyricsSubtitle => 'Fetch and save lyrics as .lrc file';
 
+  @override
+  String get trackSaveLyricsProgress => 'Saving lyrics...';
+
   @override
   String get trackReEnrich => 'Re-enrich Metadata';
 
@@ -2904,4 +2911,42 @@ class AppLocalizationsDe extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Failed: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Convert Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Convert to MP3 or Opus';
+
+  @override
+  String get trackConvertTitle => 'Convert Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Target Format';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Confirm Conversion';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Convert from $sourceFormat to $targetFormat at $bitrate?\n\nThe original file will be deleted after conversion.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Converting audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Converted to $format successfully';
+  }
+
+  @override
+  String get trackConvertFailed => 'Conversion failed';
 }

lib/l10n/app_localizations_en.dart

@@ -457,12 +457,6 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get aboutSupport => 'Support';
 
-  @override
-  String get aboutBuyMeCoffee => 'Buy me a coffee';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Support development on Ko-fi';
-
   @override
   String get aboutApp => 'App';
 
@@ -1945,6 +1939,17 @@ class AppLocalizationsEn extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Artist folders use Track Artist only';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Primary artist only for folders';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Full artist string used for folder name';
+
   @override
   String get downloadSaveFormat => 'Save Format';
 
@@ -2846,6 +2851,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get trackSaveLyricsSubtitle => 'Fetch and save lyrics as .lrc file';
 
+  @override
+  String get trackSaveLyricsProgress => 'Saving lyrics...';
+
   @override
   String get trackReEnrich => 'Re-enrich Metadata';
 
@@ -2889,4 +2897,42 @@ class AppLocalizationsEn extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Failed: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Convert Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Convert to MP3 or Opus';
+
+  @override
+  String get trackConvertTitle => 'Convert Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Target Format';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Confirm Conversion';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Convert from $sourceFormat to $targetFormat at $bitrate?\n\nThe original file will be deleted after conversion.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Converting audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Converted to $format successfully';
+  }
+
+  @override
+  String get trackConvertFailed => 'Conversion failed';
 }

lib/l10n/app_localizations_es.dart

@@ -457,12 +457,6 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get aboutSupport => 'Support';
 
-  @override
-  String get aboutBuyMeCoffee => 'Buy me a coffee';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Support development on Ko-fi';
-
   @override
   String get aboutApp => 'App';
 
@@ -1945,6 +1939,17 @@ class AppLocalizationsEs extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Artist folders use Track Artist only';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Primary artist only for folders';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Full artist string used for folder name';
+
   @override
   String get downloadSaveFormat => 'Save Format';
 
@@ -2846,6 +2851,9 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get trackSaveLyricsSubtitle => 'Fetch and save lyrics as .lrc file';
 
+  @override
+  String get trackSaveLyricsProgress => 'Saving lyrics...';
+
   @override
   String get trackReEnrich => 'Re-enrich Metadata';
 
@@ -2889,6 +2897,44 @@ class AppLocalizationsEs extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Failed: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Convert Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Convert to MP3 or Opus';
+
+  @override
+  String get trackConvertTitle => 'Convert Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Target Format';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Confirm Conversion';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Convert from $sourceFormat to $targetFormat at $bitrate?\n\nThe original file will be deleted after conversion.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Converting audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Converted to $format successfully';
+  }
+
+  @override
+  String get trackConvertFailed => 'Conversion failed';
 }
 
 /// The translations for Spanish Castilian, as used in Spain (`es_ES`).
@@ -3327,12 +3373,6 @@ class AppLocalizationsEsEs extends AppLocalizationsEs {
   @override
   String get aboutSupport => 'Soporte';
 
-  @override
-  String get aboutBuyMeCoffee => 'Invítame a un café';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Apoyar el desarrollo en Ko-fi';
-
   @override
   String get aboutApp => 'Aplicación';
 

lib/l10n/app_localizations_fr.dart

@@ -457,12 +457,6 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get aboutSupport => 'Support';
 
-  @override
-  String get aboutBuyMeCoffee => 'Buy me a coffee';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Support development on Ko-fi';
-
   @override
   String get aboutApp => 'App';
 
@@ -1945,6 +1939,17 @@ class AppLocalizationsFr extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Artist folders use Track Artist only';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Primary artist only for folders';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Full artist string used for folder name';
+
   @override
   String get downloadSaveFormat => 'Save Format';
 
@@ -2846,6 +2851,9 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get trackSaveLyricsSubtitle => 'Fetch and save lyrics as .lrc file';
 
+  @override
+  String get trackSaveLyricsProgress => 'Saving lyrics...';
+
   @override
   String get trackReEnrich => 'Re-enrich Metadata';
 
@@ -2889,4 +2897,42 @@ class AppLocalizationsFr extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Failed: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Convert Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Convert to MP3 or Opus';
+
+  @override
+  String get trackConvertTitle => 'Convert Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Target Format';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Confirm Conversion';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Convert from $sourceFormat to $targetFormat at $bitrate?\n\nThe original file will be deleted after conversion.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Converting audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Converted to $format successfully';
+  }
+
+  @override
+  String get trackConvertFailed => 'Conversion failed';
 }

lib/l10n/app_localizations_hi.dart

@@ -457,12 +457,6 @@ class AppLocalizationsHi extends AppLocalizations {
   @override
   String get aboutSupport => 'Support';
 
-  @override
-  String get aboutBuyMeCoffee => 'Buy me a coffee';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Support development on Ko-fi';
-
   @override
   String get aboutApp => 'App';
 
@@ -1945,6 +1939,17 @@ class AppLocalizationsHi extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Artist folders use Track Artist only';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Primary artist only for folders';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Full artist string used for folder name';
+
   @override
   String get downloadSaveFormat => 'Save Format';
 
@@ -2846,6 +2851,9 @@ class AppLocalizationsHi extends AppLocalizations {
   @override
   String get trackSaveLyricsSubtitle => 'Fetch and save lyrics as .lrc file';
 
+  @override
+  String get trackSaveLyricsProgress => 'Saving lyrics...';
+
   @override
   String get trackReEnrich => 'Re-enrich Metadata';
 
@@ -2889,4 +2897,42 @@ class AppLocalizationsHi extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Failed: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Convert Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Convert to MP3 or Opus';
+
+  @override
+  String get trackConvertTitle => 'Convert Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Target Format';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Confirm Conversion';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Convert from $sourceFormat to $targetFormat at $bitrate?\n\nThe original file will be deleted after conversion.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Converting audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Converted to $format successfully';
+  }
+
+  @override
+  String get trackConvertFailed => 'Conversion failed';
 }

lib/l10n/app_localizations_id.dart

@@ -462,12 +462,6 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get aboutSupport => 'Dukungan';
 
-  @override
-  String get aboutBuyMeCoffee => 'Belikan saya kopi';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Dukung pengembangan di Ko-fi';
-
   @override
   String get aboutApp => 'Aplikasi';
 
@@ -1958,6 +1952,17 @@ class AppLocalizationsId extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Folder artis hanya memakai Track Artist';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Hanya artis utama untuk folder';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artist dihapus dari nama folder (misal Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Nama artis lengkap dipakai untuk folder';
+
   @override
   String get downloadSaveFormat => 'Simpan Format';
 
@@ -2864,6 +2869,9 @@ class AppLocalizationsId extends AppLocalizations {
   String get trackSaveLyricsSubtitle =>
       'Ambil dan simpan lirik sebagai file .lrc';
 
+  @override
+  String get trackSaveLyricsProgress => 'Menyimpan lirik...';
+
   @override
   String get trackReEnrich => 'Perkaya Ulang Metadata';
 
@@ -2908,4 +2916,42 @@ class AppLocalizationsId extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Gagal: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Konversi Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Konversi ke MP3 atau Opus';
+
+  @override
+  String get trackConvertTitle => 'Konversi Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Format Tujuan';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Konfirmasi Konversi';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Konversi dari $sourceFormat ke $targetFormat pada $bitrate?\n\nFile asli akan dihapus setelah konversi.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Mengkonversi audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Berhasil dikonversi ke $format';
+  }
+
+  @override
+  String get trackConvertFailed => 'Konversi gagal';
 }

lib/l10n/app_localizations_ja.dart

@@ -453,12 +453,6 @@ class AppLocalizationsJa extends AppLocalizations {
   @override
   String get aboutSupport => 'サポート';
 
-  @override
-  String get aboutBuyMeCoffee => 'コーヒーを買ってください';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Ko-fi で開発をサポートします';
-
   @override
   String get aboutApp => 'アプリ';
 
@@ -1933,6 +1927,17 @@ class AppLocalizationsJa extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Artist folders use Track Artist only';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Primary artist only for folders';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Full artist string used for folder name';
+
   @override
   String get downloadSaveFormat => '形式を保存';
 
@@ -2832,6 +2837,9 @@ class AppLocalizationsJa extends AppLocalizations {
   @override
   String get trackSaveLyricsSubtitle => 'Fetch and save lyrics as .lrc file';
 
+  @override
+  String get trackSaveLyricsProgress => 'Saving lyrics...';
+
   @override
   String get trackReEnrich => 'Re-enrich Metadata';
 
@@ -2875,4 +2883,42 @@ class AppLocalizationsJa extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Failed: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Convert Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Convert to MP3 or Opus';
+
+  @override
+  String get trackConvertTitle => 'Convert Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Target Format';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Confirm Conversion';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Convert from $sourceFormat to $targetFormat at $bitrate?\n\nThe original file will be deleted after conversion.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Converting audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Converted to $format successfully';
+  }
+
+  @override
+  String get trackConvertFailed => 'Conversion failed';
 }

lib/l10n/app_localizations_ko.dart

@@ -457,12 +457,6 @@ class AppLocalizationsKo extends AppLocalizations {
   @override
   String get aboutSupport => 'Support';
 
-  @override
-  String get aboutBuyMeCoffee => 'Buy me a coffee';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Support development on Ko-fi';
-
   @override
   String get aboutApp => 'App';
 
@@ -1945,6 +1939,17 @@ class AppLocalizationsKo extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Artist folders use Track Artist only';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Primary artist only for folders';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Full artist string used for folder name';
+
   @override
   String get downloadSaveFormat => 'Save Format';
 
@@ -2846,6 +2851,9 @@ class AppLocalizationsKo extends AppLocalizations {
   @override
   String get trackSaveLyricsSubtitle => 'Fetch and save lyrics as .lrc file';
 
+  @override
+  String get trackSaveLyricsProgress => 'Saving lyrics...';
+
   @override
   String get trackReEnrich => 'Re-enrich Metadata';
 
@@ -2889,4 +2897,42 @@ class AppLocalizationsKo extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Failed: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Convert Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Convert to MP3 or Opus';
+
+  @override
+  String get trackConvertTitle => 'Convert Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Target Format';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Confirm Conversion';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Convert from $sourceFormat to $targetFormat at $bitrate?\n\nThe original file will be deleted after conversion.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Converting audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Converted to $format successfully';
+  }
+
+  @override
+  String get trackConvertFailed => 'Conversion failed';
 }

lib/l10n/app_localizations_nl.dart

@@ -457,12 +457,6 @@ class AppLocalizationsNl extends AppLocalizations {
   @override
   String get aboutSupport => 'Support';
 
-  @override
-  String get aboutBuyMeCoffee => 'Buy me a coffee';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Support development on Ko-fi';
-
   @override
   String get aboutApp => 'App';
 
@@ -1945,6 +1939,17 @@ class AppLocalizationsNl extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Artist folders use Track Artist only';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Primary artist only for folders';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Full artist string used for folder name';
+
   @override
   String get downloadSaveFormat => 'Save Format';
 
@@ -2846,6 +2851,9 @@ class AppLocalizationsNl extends AppLocalizations {
   @override
   String get trackSaveLyricsSubtitle => 'Fetch and save lyrics as .lrc file';
 
+  @override
+  String get trackSaveLyricsProgress => 'Saving lyrics...';
+
   @override
   String get trackReEnrich => 'Re-enrich Metadata';
 
@@ -2889,4 +2897,42 @@ class AppLocalizationsNl extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Failed: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Convert Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Convert to MP3 or Opus';
+
+  @override
+  String get trackConvertTitle => 'Convert Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Target Format';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Confirm Conversion';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Convert from $sourceFormat to $targetFormat at $bitrate?\n\nThe original file will be deleted after conversion.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Converting audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Converted to $format successfully';
+  }
+
+  @override
+  String get trackConvertFailed => 'Conversion failed';
 }

lib/l10n/app_localizations_pt.dart

@@ -457,12 +457,6 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get aboutSupport => 'Support';
 
-  @override
-  String get aboutBuyMeCoffee => 'Buy me a coffee';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Support development on Ko-fi';
-
   @override
   String get aboutApp => 'App';
 
@@ -1945,6 +1939,17 @@ class AppLocalizationsPt extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Artist folders use Track Artist only';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Primary artist only for folders';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Full artist string used for folder name';
+
   @override
   String get downloadSaveFormat => 'Save Format';
 
@@ -2846,6 +2851,9 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get trackSaveLyricsSubtitle => 'Fetch and save lyrics as .lrc file';
 
+  @override
+  String get trackSaveLyricsProgress => 'Saving lyrics...';
+
   @override
   String get trackReEnrich => 'Re-enrich Metadata';
 
@@ -2889,6 +2897,44 @@ class AppLocalizationsPt extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Failed: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Convert Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Convert to MP3 or Opus';
+
+  @override
+  String get trackConvertTitle => 'Convert Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Target Format';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Confirm Conversion';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Convert from $sourceFormat to $targetFormat at $bitrate?\n\nThe original file will be deleted after conversion.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Converting audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Converted to $format successfully';
+  }
+
+  @override
+  String get trackConvertFailed => 'Conversion failed';
 }
 
 /// The translations for Portuguese, as used in Portugal (`pt_PT`).
@@ -3326,12 +3372,6 @@ class AppLocalizationsPtPt extends AppLocalizationsPt {
   @override
   String get aboutSupport => 'Apoiar';
 
-  @override
-  String get aboutBuyMeCoffee => 'Compre-me um café';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Apoie o desenvolvimento na Ko-fi';
-
   @override
   String get aboutApp => 'Aplicativo';
 

lib/l10n/app_localizations_ru.dart

@@ -470,12 +470,6 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get aboutSupport => 'Поддержка';
 
-  @override
-  String get aboutBuyMeCoffee => 'Купить мне кофе';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Поддержать разработку на Ko-fi';
-
   @override
   String get aboutApp => 'Приложение';
 
@@ -1983,6 +1977,17 @@ class AppLocalizationsRu extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Artist folders use Track Artist only';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Primary artist only for folders';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Full artist string used for folder name';
+
   @override
   String get downloadSaveFormat => 'Формат сохранения';
 
@@ -2892,6 +2897,9 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get trackSaveLyricsSubtitle => 'Fetch and save lyrics as .lrc file';
 
+  @override
+  String get trackSaveLyricsProgress => 'Saving lyrics...';
+
   @override
   String get trackReEnrich => 'Re-enrich Metadata';
 
@@ -2935,4 +2943,42 @@ class AppLocalizationsRu extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Failed: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Convert Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Convert to MP3 or Opus';
+
+  @override
+  String get trackConvertTitle => 'Convert Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Target Format';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Confirm Conversion';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Convert from $sourceFormat to $targetFormat at $bitrate?\n\nThe original file will be deleted after conversion.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Converting audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Converted to $format successfully';
+  }
+
+  @override
+  String get trackConvertFailed => 'Conversion failed';
 }

lib/l10n/app_localizations_tr.dart

@@ -464,12 +464,6 @@ class AppLocalizationsTr extends AppLocalizations {
   @override
   String get aboutSupport => 'Destek';
 
-  @override
-  String get aboutBuyMeCoffee => 'Bana bir kahve ısmarla';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Ko-fi üzerinden uygulamayı destekle';
-
   @override
   String get aboutApp => 'Uygulama';
 
@@ -1960,6 +1954,17 @@ class AppLocalizationsTr extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Artist folders use Track Artist only';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Primary artist only for folders';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Full artist string used for folder name';
+
   @override
   String get downloadSaveFormat => 'Save Format';
 
@@ -2861,6 +2866,9 @@ class AppLocalizationsTr extends AppLocalizations {
   @override
   String get trackSaveLyricsSubtitle => 'Fetch and save lyrics as .lrc file';
 
+  @override
+  String get trackSaveLyricsProgress => 'Saving lyrics...';
+
   @override
   String get trackReEnrich => 'Re-enrich Metadata';
 
@@ -2904,4 +2912,42 @@ class AppLocalizationsTr extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Failed: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Convert Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Convert to MP3 or Opus';
+
+  @override
+  String get trackConvertTitle => 'Convert Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Target Format';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Confirm Conversion';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Convert from $sourceFormat to $targetFormat at $bitrate?\n\nThe original file will be deleted after conversion.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Converting audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Converted to $format successfully';
+  }
+
+  @override
+  String get trackConvertFailed => 'Conversion failed';
 }

lib/l10n/app_localizations_zh.dart

@@ -457,12 +457,6 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get aboutSupport => 'Support';
 
-  @override
-  String get aboutBuyMeCoffee => 'Buy me a coffee';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Support development on Ko-fi';
-
   @override
   String get aboutApp => 'App';
 
@@ -1945,6 +1939,17 @@ class AppLocalizationsZh extends AppLocalizations {
   String get downloadUseAlbumArtistForFoldersTrackSubtitle =>
       'Artist folders use Track Artist only';
 
+  @override
+  String get downloadUsePrimaryArtistOnly => 'Primary artist only for folders';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyEnabled =>
+      'Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)';
+
+  @override
+  String get downloadUsePrimaryArtistOnlyDisabled =>
+      'Full artist string used for folder name';
+
   @override
   String get downloadSaveFormat => 'Save Format';
 
@@ -2846,6 +2851,9 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get trackSaveLyricsSubtitle => 'Fetch and save lyrics as .lrc file';
 
+  @override
+  String get trackSaveLyricsProgress => 'Saving lyrics...';
+
   @override
   String get trackReEnrich => 'Re-enrich Metadata';
 
@@ -2889,6 +2897,44 @@ class AppLocalizationsZh extends AppLocalizations {
   String trackSaveFailed(String error) {
     return 'Failed: $error';
   }
+
+  @override
+  String get trackConvertFormat => 'Convert Format';
+
+  @override
+  String get trackConvertFormatSubtitle => 'Convert to MP3 or Opus';
+
+  @override
+  String get trackConvertTitle => 'Convert Audio';
+
+  @override
+  String get trackConvertTargetFormat => 'Target Format';
+
+  @override
+  String get trackConvertBitrate => 'Bitrate';
+
+  @override
+  String get trackConvertConfirmTitle => 'Confirm Conversion';
+
+  @override
+  String trackConvertConfirmMessage(
+    String sourceFormat,
+    String targetFormat,
+    String bitrate,
+  ) {
+    return 'Convert from $sourceFormat to $targetFormat at $bitrate?\n\nThe original file will be deleted after conversion.';
+  }
+
+  @override
+  String get trackConvertConverting => 'Converting audio...';
+
+  @override
+  String trackConvertSuccess(String format) {
+    return 'Converted to $format successfully';
+  }
+
+  @override
+  String get trackConvertFailed => 'Conversion failed';
 }
 
 /// The translations for Chinese, as used in China (`zh_CN`).
@@ -3337,12 +3383,6 @@ class AppLocalizationsZhCn extends AppLocalizationsZh {
   @override
   String get aboutSupport => 'Support';
 
-  @override
-  String get aboutBuyMeCoffee => 'Buy me a coffee';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Support development on Ko-fi';
-
   @override
   String get aboutApp => 'App';
 
@@ -5483,12 +5523,6 @@ class AppLocalizationsZhTw extends AppLocalizationsZh {
   @override
   String get aboutSupport => 'Support';
 
-  @override
-  String get aboutBuyMeCoffee => 'Buy me a coffee';
-
-  @override
-  String get aboutBuyMeCoffeeSubtitle => 'Support development on Ko-fi';
-
   @override
   String get aboutApp => 'App';
 

lib/l10n/arb/app_de.arb

@@ -576,14 +576,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Spendiere mir einen Kaffee",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Unterstütze die Entwicklung auf Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "App",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_en.arb

@@ -326,10 +326,6 @@
   "@aboutSocial": {"description": "Section for social links"},
   "aboutSupport": "Support",
   "@aboutSupport": {"description": "Section for support/donation links"},
-  "aboutBuyMeCoffee": "Buy me a coffee",
-  "@aboutBuyMeCoffee": {"description": "Donation link"},
-  "aboutBuyMeCoffeeSubtitle": "Support development on Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {"description": "Subtitle for donation"},
   "aboutApp": "App",
   "@aboutApp": {"description": "Section for app info"},
   "aboutVersion": "Version",
@@ -1431,6 +1427,12 @@
   "@downloadUseAlbumArtistForFoldersAlbumSubtitle": {"description": "Subtitle when Album Artist is used for folder naming"},
   "downloadUseAlbumArtistForFoldersTrackSubtitle": "Artist folders use Track Artist only",
   "@downloadUseAlbumArtistForFoldersTrackSubtitle": {"description": "Subtitle when Track Artist is used for folder naming"},
+  "downloadUsePrimaryArtistOnly": "Primary artist only for folders",
+  "@downloadUsePrimaryArtistOnly": {"description": "Setting - strip featured artists from folder name"},
+  "downloadUsePrimaryArtistOnlyEnabled": "Featured artists removed from folder name (e.g. Justin Bieber, Quavo → Justin Bieber)",
+  "@downloadUsePrimaryArtistOnlyEnabled": {"description": "Subtitle when primary artist only is enabled"},
+  "downloadUsePrimaryArtistOnlyDisabled": "Full artist string used for folder name",
+  "@downloadUsePrimaryArtistOnlyDisabled": {"description": "Subtitle when primary artist only is disabled"},
   "downloadSaveFormat": "Save Format",
   "@downloadSaveFormat": {"description": "Setting - output file format"},
   "downloadSelectService": "Select Service",
@@ -2144,6 +2146,8 @@
   "@trackSaveLyrics": {"description": "Menu action - save lyrics as .lrc file"},
   "trackSaveLyricsSubtitle": "Fetch and save lyrics as .lrc file",
   "@trackSaveLyricsSubtitle": {"description": "Subtitle for save lyrics action"},
+  "trackSaveLyricsProgress": "Saving lyrics...",
+  "@trackSaveLyricsProgress": {"description": "Snackbar while saving lyrics to file"},
   "trackReEnrich": "Re-enrich Metadata",
   "@trackReEnrich": {"description": "Menu action - re-embed metadata into audio file"},
   "trackReEnrichSubtitle": "Re-embed metadata without re-downloading",
@@ -2182,5 +2186,38 @@
     "placeholders": {
       "error": {"type": "String"}
     }
-  }
+  },
+
+  "trackConvertFormat": "Convert Format",
+  "@trackConvertFormat": {"description": "Menu item - convert audio format"},
+  "trackConvertFormatSubtitle": "Convert to MP3 or Opus",
+  "@trackConvertFormatSubtitle": {"description": "Subtitle for convert format menu item"},
+  "trackConvertTitle": "Convert Audio",
+  "@trackConvertTitle": {"description": "Title of convert bottom sheet"},
+  "trackConvertTargetFormat": "Target Format",
+  "@trackConvertTargetFormat": {"description": "Label for format selection"},
+  "trackConvertBitrate": "Bitrate",
+  "@trackConvertBitrate": {"description": "Label for bitrate selection"},
+  "trackConvertConfirmTitle": "Confirm Conversion",
+  "@trackConvertConfirmTitle": {"description": "Confirmation dialog title"},
+  "trackConvertConfirmMessage": "Convert from {sourceFormat} to {targetFormat} at {bitrate}?\n\nThe original file will be deleted after conversion.",
+  "@trackConvertConfirmMessage": {
+    "description": "Confirmation dialog message",
+    "placeholders": {
+      "sourceFormat": {"type": "String"},
+      "targetFormat": {"type": "String"},
+      "bitrate": {"type": "String"}
+    }
+  },
+  "trackConvertConverting": "Converting audio...",
+  "@trackConvertConverting": {"description": "Snackbar while converting"},
+  "trackConvertSuccess": "Converted to {format} successfully",
+  "@trackConvertSuccess": {
+    "description": "Snackbar after successful conversion",
+    "placeholders": {
+      "format": {"type": "String"}
+    }
+  },
+  "trackConvertFailed": "Conversion failed",
+  "@trackConvertFailed": {"description": "Snackbar when conversion fails"}
 }

lib/l10n/arb/app_es.arb

@@ -548,14 +548,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Buy me a coffee",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Support development on Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "App",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_es_ES.arb

@@ -548,14 +548,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Invítame a un café",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Apoyar el desarrollo en Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "Aplicación",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_fr.arb

@@ -576,14 +576,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Buy me a coffee",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Support development on Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "App",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_hi.arb

@@ -576,14 +576,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Buy me a coffee",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Support development on Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "App",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_id.arb

@@ -588,14 +588,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Belikan saya kopi",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Dukung pengembangan di Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "Aplikasi",
   "@aboutApp": {
     "description": "Section for app info"
@@ -2489,6 +2481,18 @@
   "@downloadUseAlbumArtistForFoldersTrackSubtitle": {
     "description": "Subtitle when Track Artist is used for folder naming"
   },
+  "downloadUsePrimaryArtistOnly": "Hanya artis utama untuk folder",
+  "@downloadUsePrimaryArtistOnly": {
+    "description": "Setting - strip featured artists from folder name"
+  },
+  "downloadUsePrimaryArtistOnlyEnabled": "Featured artist dihapus dari nama folder (misal Justin Bieber, Quavo → Justin Bieber)",
+  "@downloadUsePrimaryArtistOnlyEnabled": {
+    "description": "Subtitle when primary artist only is enabled"
+  },
+  "downloadUsePrimaryArtistOnlyDisabled": "Nama artis lengkap dipakai untuk folder",
+  "@downloadUsePrimaryArtistOnlyDisabled": {
+    "description": "Subtitle when primary artist only is disabled"
+  },
   "downloadSaveFormat": "Simpan Format",
   "@downloadSaveFormat": {
     "description": "Setting - output file format"
@@ -3160,11 +3164,13 @@
   "@trackSaveCoverArt": {"description": "Menu action - save album cover art as file"},
   "trackSaveCoverArtSubtitle": "Simpan cover album sebagai file .jpg",
   "@trackSaveCoverArtSubtitle": {"description": "Subtitle for save cover art action"},
-  "trackSaveLyrics": "Simpan Lirik (.lrc)",
+  "trackSaveLyrics": "Simpan Lirik (.lrc)",
-  "@trackSaveLyrics": {"description": "Menu action - save lyrics as .lrc file"},
+  "@trackSaveLyrics": {"description": "Menu action - save lyrics as .lrc file"},
-  "trackSaveLyricsSubtitle": "Ambil dan simpan lirik sebagai file .lrc",
+  "trackSaveLyricsSubtitle": "Ambil dan simpan lirik sebagai file .lrc",
-  "@trackSaveLyricsSubtitle": {"description": "Subtitle for save lyrics action"},
+  "@trackSaveLyricsSubtitle": {"description": "Subtitle for save lyrics action"},
-  "trackReEnrich": "Perkaya Ulang Metadata",
+  "trackSaveLyricsProgress": "Menyimpan lirik...",
+  "@trackSaveLyricsProgress": {"description": "Snackbar while saving lyrics to file"},
+  "trackReEnrich": "Perkaya Ulang Metadata",
   "@trackReEnrich": {"description": "Menu action - re-embed metadata into audio file"},
   "trackReEnrichSubtitle": "Tanamkan ulang metadata tanpa mengunduh ulang",
   "@trackReEnrichSubtitle": {"description": "Subtitle for re-enrich metadata action"},
@@ -3202,5 +3208,38 @@
     "placeholders": {
       "error": {"type": "String"}
     }
-  }
+  },
+
+  "trackConvertFormat": "Konversi Format",
+  "@trackConvertFormat": {"description": "Menu item - convert audio format"},
+  "trackConvertFormatSubtitle": "Konversi ke MP3 atau Opus",
+  "@trackConvertFormatSubtitle": {"description": "Subtitle for convert format menu item"},
+  "trackConvertTitle": "Konversi Audio",
+  "@trackConvertTitle": {"description": "Title of convert bottom sheet"},
+  "trackConvertTargetFormat": "Format Tujuan",
+  "@trackConvertTargetFormat": {"description": "Label for format selection"},
+  "trackConvertBitrate": "Bitrate",
+  "@trackConvertBitrate": {"description": "Label for bitrate selection"},
+  "trackConvertConfirmTitle": "Konfirmasi Konversi",
+  "@trackConvertConfirmTitle": {"description": "Confirmation dialog title"},
+  "trackConvertConfirmMessage": "Konversi dari {sourceFormat} ke {targetFormat} pada {bitrate}?\n\nFile asli akan dihapus setelah konversi.",
+  "@trackConvertConfirmMessage": {
+    "description": "Confirmation dialog message",
+    "placeholders": {
+      "sourceFormat": {"type": "String"},
+      "targetFormat": {"type": "String"},
+      "bitrate": {"type": "String"}
+    }
+  },
+  "trackConvertConverting": "Mengkonversi audio...",
+  "@trackConvertConverting": {"description": "Snackbar while converting"},
+  "trackConvertSuccess": "Berhasil dikonversi ke {format}",
+  "@trackConvertSuccess": {
+    "description": "Snackbar after successful conversion",
+    "placeholders": {
+      "format": {"type": "String"}
+    }
+  },
+  "trackConvertFailed": "Konversi gagal",
+  "@trackConvertFailed": {"description": "Snackbar when conversion fails"}
 }

lib/l10n/arb/app_ja.arb

@@ -576,14 +576,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "コーヒーを買ってください",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Ko-fi で開発をサポートします",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "アプリ",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_ko.arb

@@ -576,14 +576,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Buy me a coffee",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Support development on Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "App",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_nl.arb

@@ -576,14 +576,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Buy me a coffee",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Support development on Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "App",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_pt.arb

@@ -548,14 +548,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Buy me a coffee",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Support development on Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "App",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_pt_PT.arb

@@ -548,14 +548,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Compre-me um café",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Apoie o desenvolvimento na Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "Aplicativo",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_ru.arb

@@ -576,14 +576,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Купить мне кофе",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Поддержать разработку на Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "Приложение",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_tr.arb

@@ -576,14 +576,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Bana bir kahve ısmarla",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Ko-fi üzerinden uygulamayı destekle",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "Uygulama",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_zh.arb

@@ -548,14 +548,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Buy me a coffee",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Support development on Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "App",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_zh_CN.arb

@@ -576,14 +576,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Buy me a coffee",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Support development on Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "App",
   "@aboutApp": {
     "description": "Section for app info"

lib/l10n/arb/app_zh_TW.arb

@@ -576,14 +576,6 @@
   "@aboutSupport": {
     "description": "Section for support/donation links"
   },
-  "aboutBuyMeCoffee": "Buy me a coffee",
-  "@aboutBuyMeCoffee": {
-    "description": "Donation link"
-  },
-  "aboutBuyMeCoffeeSubtitle": "Support development on Ko-fi",
-  "@aboutBuyMeCoffeeSubtitle": {
-    "description": "Subtitle for donation"
-  },
   "aboutApp": "App",
   "@aboutApp": {
     "description": "Section for app info"

lib/main.dart

@@ -11,12 +11,21 @@ import 'package:spotiflac_android/services/cover_cache_manager.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
+  _configureImageCache();
 
   runApp(
     ProviderScope(child: const _EagerInitialization(child: SpotiFLACApp())),
   );
 }
 
+void _configureImageCache() {
+  final imageCache = PaintingBinding.instance.imageCache;
+  // Keep memory cache bounded so cover-heavy pages don't retain too many
+  // full-resolution images simultaneously.
+  imageCache.maximumSize = 240;
+  imageCache.maximumSizeBytes = 60 << 20; // 60 MiB
+}
+
 /// Widget to eagerly initialize providers that need to load data on startup
 class _EagerInitialization extends ConsumerStatefulWidget {
   const _EagerInitialization({required this.child});

lib/models/settings.dart

@@ -20,6 +20,7 @@ class AppSettings {
   final bool hasSearchedBefore;
   final String folderOrganization;
   final bool useAlbumArtistForFolders;
+  final bool usePrimaryArtistOnly; // Strip featured artists from folder name
   final String historyViewMode;
   final String historyFilterMode;
   final bool askQualityBeforeDownload;
@@ -65,6 +66,7 @@ class AppSettings {
     this.hasSearchedBefore = false,
     this.folderOrganization = 'none',
     this.useAlbumArtistForFolders = true,
+    this.usePrimaryArtistOnly = false,
     this.historyViewMode = 'grid',
     this.historyFilterMode = 'all',
     this.askQualityBeforeDownload = true,
@@ -109,6 +111,7 @@ class AppSettings {
     bool? hasSearchedBefore,
     String? folderOrganization,
     bool? useAlbumArtistForFolders,
+    bool? usePrimaryArtistOnly,
     String? historyViewMode,
     String? historyFilterMode,
     bool? askQualityBeforeDownload,
@@ -154,6 +157,8 @@ class AppSettings {
       folderOrganization: folderOrganization ?? this.folderOrganization,
       useAlbumArtistForFolders:
           useAlbumArtistForFolders ?? this.useAlbumArtistForFolders,
+      usePrimaryArtistOnly:
+          usePrimaryArtistOnly ?? this.usePrimaryArtistOnly,
       historyViewMode: historyViewMode ?? this.historyViewMode,
       historyFilterMode: historyFilterMode ?? this.historyFilterMode,
       askQualityBeforeDownload: askQualityBeforeDownload ?? this.askQualityBeforeDownload,

lib/models/settings.g.dart

@@ -23,6 +23,7 @@ AppSettings _$AppSettingsFromJson(Map<String, dynamic> json) => AppSettings(
   hasSearchedBefore: json['hasSearchedBefore'] as bool? ?? false,
   folderOrganization: json['folderOrganization'] as String? ?? 'none',
   useAlbumArtistForFolders: json['useAlbumArtistForFolders'] as bool? ?? true,
+  usePrimaryArtistOnly: json['usePrimaryArtistOnly'] as bool? ?? false,
   historyViewMode: json['historyViewMode'] as String? ?? 'grid',
   historyFilterMode: json['historyFilterMode'] as String? ?? 'all',
   askQualityBeforeDownload: json['askQualityBeforeDownload'] as bool? ?? true,
@@ -70,6 +71,7 @@ Map<String, dynamic> _$AppSettingsToJson(AppSettings instance) =>
       'hasSearchedBefore': instance.hasSearchedBefore,
       'folderOrganization': instance.folderOrganization,
       'useAlbumArtistForFolders': instance.useAlbumArtistForFolders,
+      'usePrimaryArtistOnly': instance.usePrimaryArtistOnly,
       'historyViewMode': instance.historyViewMode,
       'historyFilterMode': instance.historyFilterMode,
       'askQualityBeforeDownload': instance.askQualityBeforeDownload,

lib/providers/download_queue_provider.dart

@@ -12,6 +12,7 @@ import 'package:spotiflac_android/models/track.dart';
 import 'package:spotiflac_android/providers/settings_provider.dart';
 import 'package:spotiflac_android/providers/extension_provider.dart';
 import 'package:spotiflac_android/services/platform_bridge.dart';
+import 'package:spotiflac_android/services/download_request_payload.dart';
 import 'package:spotiflac_android/services/ffmpeg_service.dart';
 import 'package:spotiflac_android/services/notification_service.dart';
 import 'package:spotiflac_android/services/history_database.dart';
@@ -150,20 +151,37 @@ class DownloadHistoryItem {
       );
 
   DownloadHistoryItem copyWith({
+    String? trackName,
+    String? artistName,
+    String? albumName,
+    String? albumArtist,
+    String? coverUrl,
     String? filePath,
     String? storageMode,
     String? downloadTreeUri,
     String? safRelativeDir,
     String? safFileName,
     bool? safRepaired,
+    String? isrc,
+    String? spotifyId,
+    int? trackNumber,
+    int? discNumber,
+    int? duration,
+    String? releaseDate,
+    String? quality,
+    int? bitDepth,
+    int? sampleRate,
+    String? genre,
+    String? label,
+    String? copyright,
   }) {
     return DownloadHistoryItem(
       id: id,
-      trackName: trackName,
+      trackName: trackName ?? this.trackName,
-      artistName: artistName,
+      artistName: artistName ?? this.artistName,
-      albumName: albumName,
+      albumName: albumName ?? this.albumName,
-      albumArtist: albumArtist,
+      albumArtist: albumArtist ?? this.albumArtist,
-      coverUrl: coverUrl,
+      coverUrl: coverUrl ?? this.coverUrl,
       filePath: filePath ?? this.filePath,
       storageMode: storageMode ?? this.storageMode,
       downloadTreeUri: downloadTreeUri ?? this.downloadTreeUri,
@@ -172,34 +190,29 @@ class DownloadHistoryItem {
       safRepaired: safRepaired ?? this.safRepaired,
       service: service,
       downloadedAt: downloadedAt,
-      isrc: isrc,
+      isrc: isrc ?? this.isrc,
-      spotifyId: spotifyId,
+      spotifyId: spotifyId ?? this.spotifyId,
-      trackNumber: trackNumber,
+      trackNumber: trackNumber ?? this.trackNumber,
-      discNumber: discNumber,
+      discNumber: discNumber ?? this.discNumber,
-      duration: duration,
+      duration: duration ?? this.duration,
-      releaseDate: releaseDate,
+      releaseDate: releaseDate ?? this.releaseDate,
-      quality: quality,
+      quality: quality ?? this.quality,
-      bitDepth: bitDepth,
+      bitDepth: bitDepth ?? this.bitDepth,
-      sampleRate: sampleRate,
+      sampleRate: sampleRate ?? this.sampleRate,
-      genre: genre,
+      genre: genre ?? this.genre,
-      label: label,
+      label: label ?? this.label,
-      copyright: copyright,
+      copyright: copyright ?? this.copyright,
     );
   }
 }
 
 class DownloadHistoryState {
   final List<DownloadHistoryItem> items;
-  final Set<String> _downloadedSpotifyIds;
   final Map<String, DownloadHistoryItem> _bySpotifyId;
   final Map<String, DownloadHistoryItem> _byIsrc;
 
   DownloadHistoryState({this.items = const []})
-    : _downloadedSpotifyIds = items
+    : _bySpotifyId = Map.fromEntries(
-          .where((item) => item.spotifyId != null && item.spotifyId!.isNotEmpty)
-          .map((item) => item.spotifyId!)
-          .toSet(),
-      _bySpotifyId = Map.fromEntries(
         items
             .where(
               (item) => item.spotifyId != null && item.spotifyId!.isNotEmpty,
@@ -212,8 +225,7 @@ class DownloadHistoryState {
             .map((item) => MapEntry(item.isrc!, item)),
       );
 
-  bool isDownloaded(String spotifyId) =>
+  bool isDownloaded(String spotifyId) => _bySpotifyId.containsKey(spotifyId);
-      _downloadedSpotifyIds.contains(spotifyId);
 
   DownloadHistoryItem? getBySpotifyId(String spotifyId) =>
       _bySpotifyId[spotifyId];
@@ -462,6 +474,44 @@ class DownloadHistoryNotifier extends Notifier<DownloadHistoryState> {
     return DownloadHistoryItem.fromJson(json);
   }
 
+  Future<void> updateMetadataForItem({
+    required String id,
+    required String trackName,
+    required String artistName,
+    required String albumName,
+    String? albumArtist,
+    String? isrc,
+    int? trackNumber,
+    int? discNumber,
+    String? releaseDate,
+    String? genre,
+    String? label,
+    String? copyright,
+  }) async {
+    final index = state.items.indexWhere((item) => item.id == id);
+    if (index < 0) return;
+
+    final current = state.items[index];
+    final updated = current.copyWith(
+      trackName: trackName,
+      artistName: artistName,
+      albumName: albumName,
+      albumArtist: albumArtist,
+      isrc: isrc,
+      trackNumber: trackNumber,
+      discNumber: discNumber,
+      releaseDate: releaseDate,
+      genre: genre,
+      label: label,
+      copyright: copyright,
+    );
+
+    final updatedItems = [...state.items];
+    updatedItems[index] = updated;
+    state = state.copyWith(items: updatedItems);
+    await _db.upsert(updated.toJson());
+  }
+
   /// Remove history entries where the file no longer exists on disk
   /// Returns the number of orphaned entries removed
   Future<int> cleanupOrphanedDownloads() async {
@@ -469,31 +519,36 @@ class DownloadHistoryNotifier extends Notifier<DownloadHistoryState> {
 
     final entries = await _db.getAllEntriesWithPaths();
     final orphanedIds = <String>[];
+    final pathById = <String, String>{};
+    const checkChunkSize = 16;
 
-    for (final entry in entries) {
+    for (var i = 0; i < entries.length; i += checkChunkSize) {
-      final id = entry['id'] as String;
+      final end = (i + checkChunkSize < entries.length)
-      final filePath = entry['file_path'] as String?;
+          ? i + checkChunkSize
+          : entries.length;
+      final chunk = entries.sublist(i, end);
 
-      if (filePath == null || filePath.isEmpty) continue;
+      final checks = await Future.wait<MapEntry<String, bool>?>(
+        chunk.map((entry) async {
+          final id = entry['id'] as String;
+          final filePath = entry['file_path'] as String?;
+          if (filePath == null || filePath.isEmpty) return null;
+          pathById[id] = filePath;
+          try {
+            return MapEntry(id, await fileExists(filePath));
+          } catch (e) {
+            _historyLog.w('Error checking file existence for $id: $e');
+            return MapEntry(id, false);
+          }
+        }),
+      );
 
-      bool exists = false;
+      for (final check in checks) {
-
+        if (check == null || check.value) continue;
-      if (filePath.startsWith('content://')) {
+        orphanedIds.add(check.key);
-        // SAF path - check via platform bridge
+        _historyLog.d(
-        try {
+          'Found orphaned entry: ${check.key} (${pathById[check.key] ?? ''})',
-          exists = await PlatformBridge.safExists(filePath);
+        );
-        } catch (e) {
-          _historyLog.w('Error checking SAF file existence: $e');
-          exists = false;
-        }
-      } else {
-        // Regular file path
-        exists = File(filePath).existsSync();
-      }
-
-      if (!exists) {
-        orphanedIds.add(id);
-        _historyLog.d('Found orphaned entry: $id ($filePath)');
       }
     }
 
@@ -617,6 +672,7 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
   static const _queueStorageKey = 'download_queue';
   static const _progressPollingInterval = Duration(milliseconds: 800);
   static const _queueSchedulingInterval = Duration(milliseconds: 250);
+  static const _bytesUiStep = 104857; // ~0.1 MiB, matches one-decimal MB UI.
   final NotificationService _notificationService = NotificationService();
   final Future<SharedPreferences> _prefs = SharedPreferences.getInstance();
   int _totalQueuedAtStart = 0;
@@ -625,11 +681,61 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
   bool _isLoaded = false;
   final Set<String> _ensuredDirs = {};
   int _progressPollingErrorCount = 0;
+  bool _isProgressPollingInFlight = false;
   String? _lastServiceTrackName;
   String? _lastServiceArtistName;
   int _lastServicePercent = -1;
   int _lastServiceQueueCount = -1;
   DateTime _lastServiceUpdateAt = DateTime.fromMillisecondsSinceEpoch(0);
+  String? _lastFinalizingTrackName;
+  String? _lastFinalizingArtistName;
+  String? _lastNotifTrackName;
+  String? _lastNotifArtistName;
+  int _lastNotifPercent = -1;
+  int _lastNotifQueueCount = -1;
+
+  double _normalizeProgressForUi(double value) {
+    final clamped = value.clamp(0.0, 1.0).toDouble();
+    if (clamped <= 0) return 0;
+    if (clamped >= 1) return 1;
+    final rounded = double.parse(clamped.toStringAsFixed(2));
+    return rounded == 0 ? 0.01 : rounded;
+  }
+
+  double _normalizeSpeedForUi(double value) {
+    if (value <= 0) return 0;
+    return double.parse(value.toStringAsFixed(1));
+  }
+
+  int _normalizeBytesForUi(int value) {
+    if (value <= 0) return 0;
+    return (value ~/ _bytesUiStep) * _bytesUiStep;
+  }
+
+  bool _shouldUpdateProgressNotification({
+    required String trackName,
+    required String artistName,
+    required int progress,
+    required int total,
+    required int queueCount,
+  }) {
+    final safeTotal = total > 0 ? total : 1;
+    final percent = ((progress * 100) / safeTotal).round().clamp(0, 100);
+    final changed =
+        trackName != _lastNotifTrackName ||
+        artistName != _lastNotifArtistName ||
+        percent != _lastNotifPercent ||
+        queueCount != _lastNotifQueueCount;
+    if (!changed) {
+      return false;
+    }
+
+    _lastNotifTrackName = trackName;
+    _lastNotifArtistName = artistName;
+    _lastNotifPercent = percent;
+    _lastNotifQueueCount = queueCount;
+    return true;
+  }
 
   @override
   DownloadQueueState build() {
@@ -726,6 +832,8 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
   void _startMultiProgressPolling() {
     _progressTimer?.cancel();
     _progressTimer = Timer.periodic(_progressPollingInterval, (timer) async {
+      if (_isProgressPollingInFlight) return;
+      _isProgressPollingInFlight = true;
       try {
         final allProgress = await PlatformBridge.getAllDownloadProgress();
         final items = allProgress['items'] as Map<String, dynamic>? ?? {};
@@ -798,24 +906,29 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
             } else {
               percentage = progressFromBackend;
             }
+            final normalizedProgress = _normalizeProgressForUi(percentage);
+            final normalizedSpeed = _normalizeSpeedForUi(speedMBps);
+            final normalizedBytes = _normalizeBytesForUi(bytesReceived);
 
             progressUpdates[itemId] = _ProgressUpdate(
               status: DownloadStatus.downloading,
-              progress: percentage,
+              progress: normalizedProgress,
-              speedMBps: speedMBps,
+              speedMBps: normalizedSpeed,
-              bytesReceived: bytesReceived,
+              bytesReceived: normalizedBytes,
             );
 
-            final mbReceived = bytesReceived / (1024 * 1024);
+            if (LogBuffer.loggingEnabled) {
-            final mbTotal = bytesTotal / (1024 * 1024);
+              final mbReceived = bytesReceived / (1024 * 1024);
-            if (bytesTotal > 0) {
+              final mbTotal = bytesTotal / (1024 * 1024);
-              _log.d(
+              if (bytesTotal > 0) {
-                'Progress [$itemId]: ${(percentage * 100).toStringAsFixed(1)}% (${mbReceived.toStringAsFixed(2)}/${mbTotal.toStringAsFixed(2)} MB) @ ${speedMBps.toStringAsFixed(2)} MB/s',
+                _log.d(
-              );
+                  'Progress [$itemId]: ${(percentage * 100).toStringAsFixed(1)}% (${mbReceived.toStringAsFixed(2)}/${mbTotal.toStringAsFixed(2)} MB) @ ${speedMBps.toStringAsFixed(2)} MB/s',
-            } else {
+                );
-              _log.d(
+              } else {
-                'Progress [$itemId]: ${(percentage * 100).toStringAsFixed(1)}% (DASH segments/unknown size) @ ${speedMBps.toStringAsFixed(2)} MB/s',
+                _log.d(
-              );
+                  'Progress [$itemId]: ${(percentage * 100).toStringAsFixed(1)}% (DASH segments/unknown size) @ ${speedMBps.toStringAsFixed(2)} MB/s',
+                );
+              }
             }
           }
         }
@@ -858,12 +971,20 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
         }
 
         if (hasFinalizingItem && finalizingTrackName != null) {
-          _notificationService.showDownloadFinalizing(
+          final safeArtistName = finalizingArtistName ?? '';
-            trackName: finalizingTrackName,
+          if (finalizingTrackName != _lastFinalizingTrackName ||
-            artistName: finalizingArtistName ?? '',
+              safeArtistName != _lastFinalizingArtistName) {
-          );
+            _notificationService.showDownloadFinalizing(
+              trackName: finalizingTrackName,
+              artistName: safeArtistName,
+            );
+            _lastFinalizingTrackName = finalizingTrackName;
+            _lastFinalizingArtistName = safeArtistName;
+          }
           return;
         }
+        _lastFinalizingTrackName = null;
+        _lastFinalizingArtistName = null;
 
         if (items.isNotEmpty) {
           final firstEntry = items.entries.first;
@@ -889,19 +1010,28 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
               notifTotal = 100;
             }
 
-            _notificationService.showDownloadProgress(
+            final safeNotifTotal = notifTotal > 0 ? notifTotal : 1;
+            if (_shouldUpdateProgressNotification(
               trackName: trackName,
               artistName: artistName,
               progress: notifProgress,
-              total: notifTotal > 0 ? notifTotal : 1,
+              total: safeNotifTotal,
-            );
+              queueCount: queuedCount,
+            )) {
+              _notificationService.showDownloadProgress(
+                trackName: trackName,
+                artistName: artistName,
+                progress: notifProgress,
+                total: safeNotifTotal,
+              );
+            }
 
             if (Platform.isAndroid) {
               _maybeUpdateAndroidDownloadService(
                 trackName: firstDownloading.track.name,
                 artistName: firstDownloading.track.artistName,
                 progress: notifProgress,
-                total: notifTotal > 0 ? notifTotal : 1,
+                total: safeNotifTotal,
                 queueCount: queuedCount,
               );
             }
@@ -913,6 +1043,8 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
         if (_progressPollingErrorCount <= 3) {
           _log.w('Progress polling failed: $e');
         }
+      } finally {
+        _isProgressPollingInFlight = false;
       }
     });
   }
@@ -962,11 +1094,18 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
     _progressTimer?.cancel();
     _progressTimer = null;
     _progressPollingErrorCount = 0;
+    _isProgressPollingInFlight = false;
     _lastServiceTrackName = null;
     _lastServiceArtistName = null;
     _lastServicePercent = -1;
     _lastServiceQueueCount = -1;
     _lastServiceUpdateAt = DateTime.fromMillisecondsSinceEpoch(0);
+    _lastFinalizingTrackName = null;
+    _lastFinalizingArtistName = null;
+    _lastNotifTrackName = null;
+    _lastNotifArtistName = null;
+    _lastNotifPercent = -1;
+    _lastNotifQueueCount = -1;
   }
 
   Future<void> _initOutputDir() async {
@@ -1033,11 +1172,15 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
     bool separateSingles = false,
     String albumFolderStructure = 'artist_album',
     bool useAlbumArtistForFolders = true,
+    bool usePrimaryArtistOnly = false,
   }) async {
     String baseDir = state.outputDir;
-    final folderArtist = useAlbumArtistForFolders
+    var folderArtist = useAlbumArtistForFolders
         ? _normalizeOptionalString(track.albumArtist) ?? track.artistName
         : track.artistName;
+    if (usePrimaryArtistOnly) {
+      folderArtist = _extractPrimaryArtist(folderArtist);
+    }
 
     if (separateSingles) {
       final isSingle = track.isSingle;
@@ -1129,6 +1272,19 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
         .trim();
   }
 
+  static final _featuredArtistPattern = RegExp(
+    r'\s*[,;&]\s*|\s+(?:feat\.?|ft\.?|featuring|with|x)\s+',
+    caseSensitive: false,
+  );
+
+  String _extractPrimaryArtist(String artist) {
+    final match = _featuredArtistPattern.firstMatch(artist);
+    if (match != null && match.start > 0) {
+      return artist.substring(0, match.start).trim();
+    }
+    return artist;
+  }
+
   bool _isSafMode(AppSettings settings) {
     return Platform.isAndroid &&
         settings.storageMode == 'saf' &&
@@ -1152,10 +1308,14 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
     bool separateSingles = false,
     String albumFolderStructure = 'artist_album',
     bool useAlbumArtistForFolders = true,
+    bool usePrimaryArtistOnly = false,
   }) async {
-    final folderArtist = useAlbumArtistForFolders
+    var folderArtist = useAlbumArtistForFolders
         ? _normalizeOptionalString(track.albumArtist) ?? track.artistName
         : track.artistName;
+    if (usePrimaryArtistOnly) {
+      folderArtist = _extractPrimaryArtist(folderArtist);
+    }
 
     if (separateSingles) {
       final isSingle = track.isSingle;
@@ -1215,6 +1375,11 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
       }
       return '.opus';
     }
+    // Amazon stream is delivered as MP4/M4A container (may contain FLAC audio),
+    // so SAF should keep .m4a before decrypt/convert pipeline.
+    if (service.toLowerCase() == 'amazon') {
+      return '.m4a';
+    }
     if (service.toLowerCase() == 'tidal' && quality == 'HIGH') {
       return '.m4a';
     }
@@ -2565,6 +2730,7 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
               separateSingles: settings.separateSingles,
               albumFolderStructure: settings.albumFolderStructure,
               useAlbumArtistForFolders: settings.useAlbumArtistForFolders,
+              usePrimaryArtistOnly: settings.usePrimaryArtistOnly,
             )
           : '';
       String? appOutputDir;
@@ -2576,6 +2742,7 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
               separateSingles: settings.separateSingles,
               albumFolderStructure: settings.albumFolderStructure,
               useAlbumArtistForFolders: settings.useAlbumArtistForFolders,
+              usePrimaryArtistOnly: settings.usePrimaryArtistOnly,
             );
       var effectiveOutputDir = initialOutputDir;
       var effectiveSafMode = isSafMode;
@@ -2641,8 +2808,13 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
           if (spotifyId.startsWith('spotify:track:')) {
             spotifyId = spotifyId.split(':').last;
           }
-          _log.d('No Deezer ID, converting from Spotify via SongLink: $spotifyId');
+          _log.d(
-          final deezerData = await PlatformBridge.convertSpotifyToDeezer('track', spotifyId);
+            'No Deezer ID, converting from Spotify via SongLink: $spotifyId',
+          );
+          final deezerData = await PlatformBridge.convertSpotifyToDeezer(
+            'track',
+            spotifyId,
+          );
           // Response is TrackResponse: {"track": {"spotify_id": "deezer:XXXXX", ...}}
           final trackData = deezerData['track'];
           if (trackData is Map<String, dynamic>) {
@@ -2652,20 +2824,29 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
               _log.d('Found Deezer track ID via SongLink: $deezerTrackId');
             } else if (deezerData['id'] != null) {
               deezerTrackId = deezerData['id'].toString();
-              _log.d('Found Deezer track ID via SongLink (legacy): $deezerTrackId');
+              _log.d(
+                'Found Deezer track ID via SongLink (legacy): $deezerTrackId',
+              );
             }
 
             // Enrich track metadata from Deezer response (release_date, isrc, etc.)
-            final deezerReleaseDate = _normalizeOptionalString(trackData['release_date'] as String?);
+            final deezerReleaseDate = _normalizeOptionalString(
-            final deezerIsrc = _normalizeOptionalString(trackData['isrc'] as String?);
+              trackData['release_date'] as String?,
+            );
+            final deezerIsrc = _normalizeOptionalString(
+              trackData['isrc'] as String?,
+            );
             final deezerTrackNum = trackData['track_number'] as int?;
             final deezerDiscNum = trackData['disc_number'] as int?;
 
             final needsEnrich =
-                (trackToDownload.releaseDate == null && deezerReleaseDate != null) ||
+                (trackToDownload.releaseDate == null &&
+                    deezerReleaseDate != null) ||
                 (trackToDownload.isrc == null && deezerIsrc != null) ||
-                (!_isValidISRC(trackToDownload.isrc ?? '') && deezerIsrc != null) ||
+                (!_isValidISRC(trackToDownload.isrc ?? '') &&
-                (trackToDownload.trackNumber == null && deezerTrackNum != null) ||
+                    deezerIsrc != null) ||
+                (trackToDownload.trackNumber == null &&
+                    deezerTrackNum != null) ||
                 (trackToDownload.discNumber == null && deezerDiscNum != null);
 
             if (needsEnrich) {
@@ -2688,7 +2869,9 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
                 albumType: trackToDownload.albumType,
                 source: trackToDownload.source,
               );
-              _log.d('Enriched track from Deezer - date: ${trackToDownload.releaseDate}, ISRC: ${trackToDownload.isrc}, track: ${trackToDownload.trackNumber}, disc: ${trackToDownload.discNumber}');
+              _log.d(
+                'Enriched track from Deezer - date: ${trackToDownload.releaseDate}, ISRC: ${trackToDownload.isrc}, track: ${trackToDownload.trackNumber}, disc: ${trackToDownload.discNumber}',
+              );
             }
           } else if (deezerData['id'] != null) {
             deezerTrackId = deezerData['id'].toString();
@@ -2733,129 +2916,64 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
         final relativeDir = useSaf ? outputDir : '';
         final fileName = useSaf ? (safFileName ?? '') : '';
         final outputExt = useSaf ? safOutputExt : '';
+        final isYouTube = item.service == 'youtube';
+        final shouldUseExtensions = !isYouTube && useExtensions;
+        final shouldUseFallback =
+            !isYouTube && !shouldUseExtensions && state.autoFallback;
 
-        // YouTube provider - lossy only, bypasses fallback chain
+        if (isYouTube) {
-        if (item.service == 'youtube') {
           _log.d('Using YouTube/Cobalt provider for download');
           _log.d('Quality: $quality (lossy only)');
-          _log.d('Output dir: $outputDir');
+        } else if (shouldUseExtensions) {
-          return PlatformBridge.downloadFromYouTube(
-            trackName: trackToDownload.name,
-            artistName: trackToDownload.artistName,
-            albumName: trackToDownload.albumName,
-            albumArtist: normalizedAlbumArtist,
-            coverUrl: trackToDownload.coverUrl,
-            outputDir: outputDir,
-            filenameFormat: state.filenameFormat,
-            quality: quality,
-            trackNumber: trackToDownload.trackNumber ?? 1,
-            discNumber: trackToDownload.discNumber ?? 1,
-            releaseDate: trackToDownload.releaseDate,
-            itemId: item.id,
-            durationMs: trackToDownload.duration,
-            isrc: trackToDownload.isrc,
-            spotifyId: trackToDownload.id,
-            deezerId: deezerTrackId,
-            storageMode: storageMode,
-            safTreeUri: treeUri,
-            safRelativeDir: relativeDir,
-            safFileName: fileName,
-            safOutputExt: outputExt,
-          );
-        }
-
-        if (useExtensions) {
           _log.d('Using extension providers for download');
           _log.d(
             'Quality: $quality${item.qualityOverride != null ? ' (override)' : ''}',
           );
-          _log.d('Output dir: $outputDir');
+        } else if (shouldUseFallback) {
-          return PlatformBridge.downloadWithExtensions(
-            isrc: trackToDownload.isrc ?? '',
-            spotifyId: trackToDownload.id,
-            trackName: trackToDownload.name,
-            artistName: trackToDownload.artistName,
-            albumName: trackToDownload.albumName,
-            albumArtist: normalizedAlbumArtist,
-            coverUrl: trackToDownload.coverUrl,
-            outputDir: outputDir,
-            filenameFormat: state.filenameFormat,
-            quality: quality,
-            trackNumber: trackToDownload.trackNumber ?? 1,
-            discNumber: trackToDownload.discNumber ?? 1,
-            releaseDate: trackToDownload.releaseDate,
-            itemId: item.id,
-            durationMs: trackToDownload.duration,
-            source: trackToDownload.source,
-            genre: genre,
-            label: label,
-            lyricsMode: settings.lyricsMode,
-            preferredService: item.service,
-            storageMode: storageMode,
-            safTreeUri: treeUri,
-            safRelativeDir: relativeDir,
-            safFileName: fileName,
-            safOutputExt: outputExt,
-          );
-        }
-
-        if (state.autoFallback) {
           _log.d('Using auto-fallback mode');
           _log.d(
             'Quality: $quality${item.qualityOverride != null ? ' (override)' : ''}',
           );
-          _log.d('Output dir: $outputDir');
-          return PlatformBridge.downloadWithFallback(
-            isrc: trackToDownload.isrc ?? '',
-            spotifyId: trackToDownload.id,
-            trackName: trackToDownload.name,
-            artistName: trackToDownload.artistName,
-            albumName: trackToDownload.albumName,
-            albumArtist: normalizedAlbumArtist,
-            coverUrl: trackToDownload.coverUrl,
-            outputDir: outputDir,
-            filenameFormat: state.filenameFormat,
-            quality: quality,
-            trackNumber: trackToDownload.trackNumber ?? 1,
-            discNumber: trackToDownload.discNumber ?? 1,
-            releaseDate: trackToDownload.releaseDate,
-            preferredService: item.service,
-            itemId: item.id,
-            durationMs: trackToDownload.duration,
-            genre: genre,
-            label: label,
-            lyricsMode: settings.lyricsMode,
-            storageMode: storageMode,
-            safTreeUri: treeUri,
-            safRelativeDir: relativeDir,
-            safFileName: fileName,
-            safOutputExt: outputExt,
-          );
         }
+        _log.d('Output dir: $outputDir');
 
-        return PlatformBridge.downloadTrack(
+        final payload = DownloadRequestPayload(
           isrc: trackToDownload.isrc ?? '',
           service: item.service,
           spotifyId: trackToDownload.id,
           trackName: trackToDownload.name,
           artistName: trackToDownload.artistName,
           albumName: trackToDownload.albumName,
-          albumArtist: normalizedAlbumArtist,
+          albumArtist: normalizedAlbumArtist ?? trackToDownload.artistName,
-          coverUrl: trackToDownload.coverUrl,
+          coverUrl: trackToDownload.coverUrl ?? '',
           outputDir: outputDir,
           filenameFormat: state.filenameFormat,
           quality: quality,
+          // Keep prior behavior: non-YouTube paths were implicitly true.
+          embedLyrics: isYouTube ? settings.embedLyrics : true,
+          embedMaxQualityCover: settings.maxQualityCover,
           trackNumber: trackToDownload.trackNumber ?? 1,
           discNumber: trackToDownload.discNumber ?? 1,
-          releaseDate: trackToDownload.releaseDate,
+          releaseDate: trackToDownload.releaseDate ?? '',
           itemId: item.id,
           durationMs: trackToDownload.duration,
+          source: trackToDownload.source ?? '',
+          genre: genre ?? '',
+          label: label ?? '',
+          deezerId: deezerTrackId ?? '',
+          lyricsMode: settings.lyricsMode,
           storageMode: storageMode,
           safTreeUri: treeUri,
           safRelativeDir: relativeDir,
           safFileName: fileName,
           safOutputExt: outputExt,
         );
+
+        return PlatformBridge.downloadByStrategy(
+          payload: payload,
+          useExtensions: shouldUseExtensions,
+          useFallback: shouldUseFallback,
+        );
       }
 
       result = await runDownload(
@@ -2873,6 +2991,7 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
           separateSingles: settings.separateSingles,
           albumFolderStructure: settings.albumFolderStructure,
           useAlbumArtistForFolders: settings.useAlbumArtistForFolders,
+          usePrimaryArtistOnly: settings.usePrimaryArtistOnly,
         );
         final fallbackResult = await runDownload(
           useSaf: false,
@@ -2937,6 +3056,117 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
         final actualService =
             ((result['service'] as String?)?.toLowerCase()) ??
             item.service.toLowerCase();
+        final decryptionKey =
+            (result['decryption_key'] as String?)?.trim() ?? '';
+
+        if (!wasExisting &&
+            decryptionKey.isNotEmpty &&
+            filePath != null &&
+            actualService == 'amazon') {
+          _log.i('Amazon encrypted stream detected, decrypting via FFmpeg...');
+          updateItemStatus(item.id, DownloadStatus.downloading, progress: 0.9);
+
+          if (effectiveSafMode && isContentUri(filePath)) {
+            final currentFilePath = filePath;
+            final tempPath = await _copySafToTemp(currentFilePath);
+            if (tempPath == null) {
+              _log.e('Failed to copy encrypted SAF file to temp for decrypt');
+              updateItemStatus(
+                item.id,
+                DownloadStatus.failed,
+                error: 'Failed to access encrypted SAF file',
+                errorType: DownloadErrorType.unknown,
+              );
+              return;
+            }
+
+            String? decryptedTempPath;
+            try {
+              decryptedTempPath = await FFmpegService.decryptAudioFile(
+                inputPath: tempPath,
+                decryptionKey: decryptionKey,
+                deleteOriginal: false,
+              );
+              if (decryptedTempPath == null) {
+                _log.e('FFmpeg decrypt failed for SAF file');
+                updateItemStatus(
+                  item.id,
+                  DownloadStatus.failed,
+                  error: 'Failed to decrypt Amazon stream',
+                  errorType: DownloadErrorType.unknown,
+                );
+                return;
+              }
+
+              final dotIndex = decryptedTempPath.lastIndexOf('.');
+              final decryptedExt = dotIndex >= 0
+                  ? decryptedTempPath.substring(dotIndex).toLowerCase()
+                  : '.flac';
+              final allowedExt = <String>{'.flac', '.m4a', '.mp3', '.opus'};
+              final finalExt = allowedExt.contains(decryptedExt)
+                  ? decryptedExt
+                  : '.flac';
+
+              final newFileName = '${safBaseName ?? 'track'}$finalExt';
+              final newUri = await _writeTempToSaf(
+                treeUri: settings.downloadTreeUri,
+                relativeDir: effectiveOutputDir,
+                fileName: newFileName,
+                mimeType: _mimeTypeForExt(finalExt),
+                srcPath: decryptedTempPath,
+              );
+
+              if (newUri == null) {
+                _log.e('Failed to write decrypted Amazon stream back to SAF');
+                updateItemStatus(
+                  item.id,
+                  DownloadStatus.failed,
+                  error: 'Failed to write decrypted file to storage',
+                  errorType: DownloadErrorType.unknown,
+                );
+                return;
+              }
+
+              if (newUri != currentFilePath) {
+                await _deleteSafFile(currentFilePath);
+              }
+              filePath = newUri;
+              finalSafFileName = newFileName;
+              _log.i('Amazon SAF decryption completed');
+            } finally {
+              try {
+                await File(tempPath).delete();
+              } catch (_) {}
+              if (decryptedTempPath != null && decryptedTempPath != tempPath) {
+                try {
+                  await File(decryptedTempPath).delete();
+                } catch (_) {}
+              }
+            }
+          } else {
+            final decryptedPath = await FFmpegService.decryptAudioFile(
+              inputPath: filePath,
+              decryptionKey: decryptionKey,
+              deleteOriginal: true,
+            );
+            if (decryptedPath == null) {
+              _log.e('FFmpeg decrypt failed for local file');
+              updateItemStatus(
+                item.id,
+                DownloadStatus.failed,
+                error: 'Failed to decrypt Amazon stream',
+                errorType: DownloadErrorType.unknown,
+              );
+              try {
+                await deleteFile(filePath);
+              } catch (_) {}
+              return;
+            }
+            filePath = decryptedPath;
+            _log.i('Amazon local decryption completed');
+          }
+        }
+
         final isContentUriPath = filePath != null && isContentUri(filePath);
         final mimeType = isContentUriPath
             ? await _getSafMimeType(filePath)
@@ -3363,18 +3593,54 @@ class DownloadQueueNotifier extends Notifier<DownloadQueueState> {
                 await File(tempPath).delete();
               } catch (_) {}
             }
-        }
+          }
+        } else if (!isContentUriPath &&
+            !effectiveSafMode &&
+            isFlacFile &&
+            !wasExisting &&
+            actualService == 'amazon' &&
+            decryptionKey.isNotEmpty) {
+          _log.d(
+            'Local FLAC after Amazon decrypt detected, embedding metadata and cover...',
+          );
+          try {
+            updateItemStatus(
+              item.id,
+              DownloadStatus.downloading,
+              progress: 0.99,
+            );
+
+            final finalTrack = _buildTrackForMetadataEmbedding(
+              trackToDownload,
+              result,
+              normalizedAlbumArtist,
+            );
+            final backendGenre = result['genre'] as String?;
+            final backendLabel = result['label'] as String?;
+            final backendCopyright = result['copyright'] as String?;
+
+            await _embedMetadataAndCover(
+              filePath,
+              finalTrack,
+              genre: backendGenre ?? genre,
+              label: backendLabel ?? label,
+              copyright: backendCopyright,
+            );
+            _log.d('Local FLAC metadata embedding completed');
+          } catch (e) {
+            _log.w('Local FLAC metadata embedding failed: $e');
+          }
         }
 
         // YouTube downloads: embed metadata to raw Opus/MP3 files from Cobalt
-        if (!wasExisting &&
+        if (!wasExisting && item.service == 'youtube' && filePath != null) {
-            item.service == 'youtube' &&
-            filePath != null) {
           final isOpusFile = filePath.endsWith('.opus');
           final isMp3File = filePath.endsWith('.mp3');
 
           if (isOpusFile || isMp3File) {
-            _log.i('YouTube download: embedding metadata to ${isOpusFile ? 'Opus' : 'MP3'} file');
+            _log.i(
+              'YouTube download: embedding metadata to ${isOpusFile ? 'Opus' : 'MP3'} file',
+            );
             updateItemStatus(
               item.id,
               DownloadStatus.downloading,
@@ -3752,15 +4018,29 @@ final downloadQueueProvider =
 
 class DownloadQueueLookup {
   final Map<String, DownloadItem> byTrackId;
+  final Map<String, DownloadItem> byItemId;
+  final List<String> itemIds;
 
-  DownloadQueueLookup._(this.byTrackId);
+  DownloadQueueLookup._({
+    required this.byTrackId,
+    required this.byItemId,
+    required this.itemIds,
+  });
 
   factory DownloadQueueLookup.fromItems(List<DownloadItem> items) {
-    final map = <String, DownloadItem>{};
+    final byTrackId = <String, DownloadItem>{};
+    final byItemId = <String, DownloadItem>{};
+    final itemIds = <String>[];
     for (final item in items) {
-      map.putIfAbsent(item.track.id, () => item);
+      byTrackId.putIfAbsent(item.track.id, () => item);
+      byItemId[item.id] = item;
+      itemIds.add(item.id);
     }
-    return DownloadQueueLookup._(map);
+    return DownloadQueueLookup._(
+      byTrackId: byTrackId,
+      byItemId: byItemId,
+      itemIds: itemIds,
+    );
   }
 }
 

lib/providers/local_library_provider.dart

@@ -12,6 +12,7 @@ final _log = AppLogger('LocalLibrary');
 
 const _lastScannedAtKey = 'local_library_last_scanned_at';
 const _excludedDownloadedCountKey = 'local_library_excluded_downloaded_count';
+final _prefs = SharedPreferences.getInstance();
 
 class LocalLibraryState {
   final List<LocalLibraryItem> items;
@@ -24,9 +25,9 @@ class LocalLibraryState {
   final bool scanWasCancelled;
   final DateTime? lastScannedAt;
   final int excludedDownloadedCount;
-  final Set<String> _isrcSet;
   final Set<String> _trackKeySet;
   final Map<String, LocalLibraryItem> _byIsrc;
+  final Map<String, LocalLibraryItem> _byTrackKey;
 
   LocalLibraryState({
     this.items = const [],
@@ -39,18 +40,22 @@ class LocalLibraryState {
     this.scanWasCancelled = false,
     this.lastScannedAt,
     this.excludedDownloadedCount = 0,
-  }) : _isrcSet = items
+    Set<String>? trackKeySet,
-           .where((item) => item.isrc != null && item.isrc!.isNotEmpty)
+    Map<String, LocalLibraryItem>? byIsrc,
-           .map((item) => item.isrc!)
+    Map<String, LocalLibraryItem>? byTrackKey,
-           .toSet(),
+  }) : _trackKeySet = trackKeySet ?? items.map((item) => item.matchKey).toSet(),
-       _trackKeySet = items.map((item) => item.matchKey).toSet(),
+       _byIsrc =
-       _byIsrc = Map.fromEntries(
+           byIsrc ??
-         items
+           Map.fromEntries(
-             .where((item) => item.isrc != null && item.isrc!.isNotEmpty)
+             items
-             .map((item) => MapEntry(item.isrc!, item)),
+                 .where((item) => item.isrc != null && item.isrc!.isNotEmpty)
-       );
+                 .map((item) => MapEntry(item.isrc!, item)),
+           ),
+       _byTrackKey =
+           byTrackKey ??
+           Map.fromEntries(items.map((item) => MapEntry(item.matchKey, item)));
 
-  bool hasIsrc(String isrc) => _isrcSet.contains(isrc);
+  bool hasIsrc(String isrc) => _byIsrc.containsKey(isrc);
 
   bool hasTrack(String trackName, String artistName) {
     final key = '${trackName.toLowerCase()}|${artistName.toLowerCase()}';
@@ -61,7 +66,7 @@ class LocalLibraryState {
 
   LocalLibraryItem? findByTrackAndArtist(String trackName, String artistName) {
     final key = '${trackName.toLowerCase()}|${artistName.toLowerCase()}';
-    return items.where((item) => item.matchKey == key).firstOrNull;
+    return _byTrackKey[key];
   }
 
   bool existsInLibrary({String? isrc, String? trackName, String? artistName}) {
@@ -86,8 +91,11 @@ class LocalLibraryState {
     DateTime? lastScannedAt,
     int? excludedDownloadedCount,
   }) {
+    final nextItems = items ?? this.items;
+    final keepDerivedIndex = identical(nextItems, this.items);
+
     return LocalLibraryState(
-      items: items ?? this.items,
+      items: nextItems,
       isScanning: isScanning ?? this.isScanning,
       scanProgress: scanProgress ?? this.scanProgress,
       scanCurrentFile: scanCurrentFile ?? this.scanCurrentFile,
@@ -98,6 +106,9 @@ class LocalLibraryState {
       lastScannedAt: lastScannedAt ?? this.lastScannedAt,
       excludedDownloadedCount:
           excludedDownloadedCount ?? this.excludedDownloadedCount,
+      trackKeySet: keepDerivedIndex ? _trackKeySet : null,
+      byIsrc: keepDerivedIndex ? _byIsrc : null,
+      byTrackKey: keepDerivedIndex ? _byTrackKey : null,
     );
   }
 }
@@ -110,6 +121,7 @@ class LocalLibraryNotifier extends Notifier<LocalLibraryState> {
   bool _isLoaded = false;
   bool _scanCancelRequested = false;
   int _progressPollingErrorCount = 0;
+  bool _isProgressPollingInFlight = false;
 
   @override
   LocalLibraryState build() {
@@ -128,13 +140,17 @@ class LocalLibraryNotifier extends Notifier<LocalLibraryState> {
     _isLoaded = true;
 
     try {
-      final jsonList = await _db.getAll();
+      final dbItemsFuture = _db.getAll();
-      final items = jsonList.map((e) => LocalLibraryItem.fromJson(e)).toList();
+      final prefsFuture = _prefs;
+      final jsonList = await dbItemsFuture;
+      final items = jsonList
+          .map((e) => LocalLibraryItem.fromJson(e))
+          .toList(growable: false);
 
       DateTime? lastScannedAt;
       var excludedDownloadedCount = 0;
       try {
-        final prefs = await SharedPreferences.getInstance();
+        final prefs = await prefsFuture;
         final lastScannedAtStr = prefs.getString(_lastScannedAtKey);
         if (lastScannedAtStr != null && lastScannedAtStr.isNotEmpty) {
           lastScannedAt = DateTime.tryParse(lastScannedAtStr);
@@ -395,16 +411,37 @@ class LocalLibraryNotifier extends Notifier<LocalLibraryState> {
   void _startProgressPolling() {
     _progressTimer?.cancel();
     _progressTimer = Timer.periodic(_progressPollingInterval, (_) async {
+      if (_isProgressPollingInFlight) return;
+      _isProgressPollingInFlight = true;
       try {
         final progress = await PlatformBridge.getLibraryScanProgress();
-
+        final nextProgress =
-        state = state.copyWith(
+            (progress['progress_pct'] as num?)?.toDouble() ?? 0;
-          scanProgress: (progress['progress_pct'] as num?)?.toDouble() ?? 0,
+        final normalizedProgress = ((nextProgress * 10).round() / 10).clamp(
-          scanCurrentFile: progress['current_file'] as String?,
+          0.0,
-          scanTotalFiles: progress['total_files'] as int? ?? 0,
+          100.0,
-          scannedFiles: progress['scanned_files'] as int? ?? 0,
-          scanErrorCount: progress['error_count'] as int? ?? 0,
         );
+        final currentFile = progress['current_file'] as String?;
+        final totalFiles = progress['total_files'] as int? ?? 0;
+        final scannedFiles = progress['scanned_files'] as int? ?? 0;
+        final errorCount = progress['error_count'] as int? ?? 0;
+
+        final shouldUpdateState =
+            state.scanProgress != normalizedProgress ||
+            state.scanCurrentFile != currentFile ||
+            state.scanTotalFiles != totalFiles ||
+            state.scannedFiles != scannedFiles ||
+            state.scanErrorCount != errorCount;
+
+        if (shouldUpdateState) {
+          state = state.copyWith(
+            scanProgress: normalizedProgress,
+            scanCurrentFile: currentFile,
+            scanTotalFiles: totalFiles,
+            scannedFiles: scannedFiles,
+            scanErrorCount: errorCount,
+          );
+        }
 
         if (progress['is_complete'] == true) {
           _stopProgressPolling();
@@ -415,6 +452,8 @@ class LocalLibraryNotifier extends Notifier<LocalLibraryState> {
         if (_progressPollingErrorCount <= 3) {
           _log.w('Library scan progress polling failed: $e');
         }
+      } finally {
+        _isProgressPollingInFlight = false;
       }
     });
   }
@@ -423,6 +462,7 @@ class LocalLibraryNotifier extends Notifier<LocalLibraryState> {
     _progressTimer?.cancel();
     _progressTimer = null;
     _progressPollingErrorCount = 0;
+    _isProgressPollingInFlight = false;
   }
 
   Future<void> cancelScan() async {
@@ -560,17 +600,34 @@ class LocalLibraryNotifier extends Notifier<LocalLibraryState> {
       }
     }
 
+    final paths = legacyPaths
+        .where((path) => !path.startsWith('content://'))
+        .toList(growable: false);
+    const chunkSize = 24;
     final backfilled = <String, int>{};
-    for (final path in legacyPaths) {
+
-      if (_scanCancelRequested || path.startsWith('content://')) {
+    for (var i = 0; i < paths.length; i += chunkSize) {
-        continue;
+      if (_scanCancelRequested) {
+        break;
       }
-      try {
+      final end = (i + chunkSize < paths.length) ? i + chunkSize : paths.length;
-        final stat = await File(path).stat();
+      final chunk = paths.sublist(i, end);
-        if (stat.type == FileSystemEntityType.file) {
+      final chunkEntries = await Future.wait<MapEntry<String, int>?>(
-          backfilled[path] = stat.modified.millisecondsSinceEpoch;
+        chunk.map((path) async {
+          try {
+            final stat = await File(path).stat();
+            if (stat.type == FileSystemEntityType.file) {
+              return MapEntry(path, stat.modified.millisecondsSinceEpoch);
+            }
+          } catch (_) {}
+          return null;
+        }),
+      );
+      for (final entry in chunkEntries) {
+        if (entry != null) {
+          backfilled[entry.key] = entry.value;
         }
-      } catch (_) {}
+      }
     }
     return backfilled;
   }

lib/providers/settings_provider.dart

@@ -231,6 +231,11 @@ class SettingsNotifier extends Notifier<AppSettings> {
     _saveSettings();
   }
 
+  void setUsePrimaryArtistOnly(bool enabled) {
+    state = state.copyWith(usePrimaryArtistOnly: enabled);
+    _saveSettings();
+  }
+
   void setHistoryViewMode(String mode) {
     state = state.copyWith(historyViewMode: mode);
     _saveSettings();

lib/providers/track_provider.dart

@@ -26,8 +26,10 @@ class TrackState {
   final List<SearchPlaylist>? searchPlaylists; // For search results (playlists)
   final bool hasSearchText; // For back button handling
   final bool isShowingRecentAccess; // For recent access mode
-  final String? searchExtensionId; // Extension ID used for current search results
+  final String?
-  final String? selectedSearchFilter; // Currently selected search filter (e.g., "track", "album", "artist", "playlist")
+  searchExtensionId; // Extension ID used for current search results
+  final String?
+  selectedSearchFilter; // Currently selected search filter (e.g., "track", "album", "artist", "playlist")
 
   const TrackState({
     this.tracks = const [],
@@ -52,7 +54,12 @@ class TrackState {
     this.selectedSearchFilter,
   });
 
-  bool get hasContent => tracks.isNotEmpty || artistAlbums != null || (searchArtists != null && searchArtists!.isNotEmpty) || (searchAlbums != null && searchAlbums!.isNotEmpty) || (searchPlaylists != null && searchPlaylists!.isNotEmpty);
+  bool get hasContent =>
+      tracks.isNotEmpty ||
+      artistAlbums != null ||
+      (searchArtists != null && searchArtists!.isNotEmpty) ||
+      (searchAlbums != null && searchAlbums!.isNotEmpty) ||
+      (searchPlaylists != null && searchPlaylists!.isNotEmpty);
 
   TrackState copyWith({
     List<Track>? tracks,
@@ -95,9 +102,12 @@ class TrackState {
       searchAlbums: searchAlbums ?? this.searchAlbums,
       searchPlaylists: searchPlaylists ?? this.searchPlaylists,
       hasSearchText: hasSearchText ?? this.hasSearchText,
-      isShowingRecentAccess: isShowingRecentAccess ?? this.isShowingRecentAccess,
+      isShowingRecentAccess:
+          isShowingRecentAccess ?? this.isShowingRecentAccess,
       searchExtensionId: searchExtensionId,
-      selectedSearchFilter: clearSelectedSearchFilter ? null : (selectedSearchFilter ?? this.selectedSearchFilter),
+      selectedSearchFilter: clearSelectedSearchFilter
+          ? null
+          : (selectedSearchFilter ?? this.selectedSearchFilter),
     );
   }
 }
@@ -178,6 +188,7 @@ class SearchPlaylist {
 
 class TrackNotifier extends Notifier<TrackState> {
   int _currentRequestId = 0;
+  static const int _maxPreWarmTracksPerRequest = 80;
 
   @override
   TrackState build() {
@@ -197,39 +208,42 @@ class TrackNotifier extends Notifier<TrackState> {
       final extensionHandler = await PlatformBridge.findURLHandler(url);
       if (extensionHandler != null) {
         _log.i('Found extension URL handler: $extensionHandler for URL: $url');
-        
+
         // Retry logic for extension URL handlers (up to 3 attempts)
         Map<String, dynamic>? result;
         for (int attempt = 1; attempt <= 3; attempt++) {
           result = await PlatformBridge.handleURLWithExtension(url);
           if (!_isRequestValid(requestId)) return;
-          
+
           // Check if we got valid data
-          if (result != null && result['type'] == 'track' && result['track'] != null) {
+          if (result != null &&
+              result['type'] == 'track' &&
+              result['track'] != null) {
             final trackData = result['track'] as Map<String, dynamic>;
             final name = trackData['name']?.toString() ?? '';
             if (name.isNotEmpty) {
               break;
             }
-          } else if (result != null && (result['type'] == 'album' || result['type'] == 'playlist')) {
+          } else if (result != null &&
+              (result['type'] == 'album' || result['type'] == 'playlist')) {
             break;
           } else if (result != null && result['type'] == 'artist') {
             break;
           }
-          
+
           if (attempt < 3) {
             await Future.delayed(const Duration(milliseconds: 500));
           }
         }
-        
+
         if (result != null) {
           final type = result['type'] as String?;
           final extensionId = result['extension_id'] as String?;
-          
+
           if (type == 'track' && result['track'] != null) {
             final trackData = result['track'] as Map<String, dynamic>;
             final track = _parseSearchTrack(trackData, source: extensionId);
-            
+
             if (track.name.isEmpty) {
               state = TrackState(
                 isLoading: false,
@@ -237,7 +251,7 @@ class TrackNotifier extends Notifier<TrackState> {
               );
               return;
             }
-            
+
             state = TrackState(
               tracks: [track],
               isLoading: false,
@@ -245,15 +259,27 @@ class TrackNotifier extends Notifier<TrackState> {
               searchExtensionId: extensionId,
             );
             return;
-          } else if ((type == 'album' || type == 'playlist') && result['tracks'] != null) {
+          } else if ((type == 'album' || type == 'playlist') &&
+              result['tracks'] != null) {
             final trackList = result['tracks'] as List<dynamic>;
-            final tracks = trackList.map((t) => _parseSearchTrack(t as Map<String, dynamic>, source: extensionId)).toList();
+            final tracks = trackList
+                .map(
+                  (t) => _parseSearchTrack(
+                    t as Map<String, dynamic>,
+                    source: extensionId,
+                  ),
+                )
+                .toList();
             state = TrackState(
               tracks: tracks,
               isLoading: false,
               albumId: result['album']?['id'] as String?,
-              albumName: result['name'] as String? ?? result['album']?['name'] as String?,
+              albumName:
-              playlistName: type == 'playlist' ? result['name'] as String? : null,
+                  result['name'] as String? ??
+                  result['album']?['name'] as String?,
+              playlistName: type == 'playlist'
+                  ? result['name'] as String?
+                  : null,
               coverUrl: result['cover_url'] as String?,
               searchExtensionId: extensionId,
             );
@@ -261,17 +287,29 @@ class TrackNotifier extends Notifier<TrackState> {
           } else if (type == 'artist' && result['artist'] != null) {
             final artistData = result['artist'] as Map<String, dynamic>;
             final albumsList = artistData['albums'] as List<dynamic>? ?? [];
-            final albums = albumsList.map((a) => _parseArtistAlbum(a as Map<String, dynamic>)).toList();
+            final albums = albumsList
-            
+                .map((a) => _parseArtistAlbum(a as Map<String, dynamic>))
-            final topTracksList = artistData['top_tracks'] as List<dynamic>? ?? [];
+                .toList();
-            final topTracks = topTracksList.map((t) => _parseSearchTrack(t as Map<String, dynamic>, source: extensionId)).toList();
+
-            
+            final topTracksList =
+                artistData['top_tracks'] as List<dynamic>? ?? [];
+            final topTracks = topTracksList
+                .map(
+                  (t) => _parseSearchTrack(
+                    t as Map<String, dynamic>,
+                    source: extensionId,
+                  ),
+                )
+                .toList();
+
             state = TrackState(
               tracks: [],
               isLoading: false,
               artistId: artistData['id'] as String?,
               artistName: artistData['name'] as String?,
-              coverUrl: artistData['image_url'] as String? ?? artistData['images'] as String?,
+              coverUrl:
+                  artistData['image_url'] as String? ??
+                  artistData['images'] as String?,
               headerImageUrl: artistData['header_image'] as String?,
               monthlyListeners: artistData['listeners'] as int?,
               artistAlbums: albums,
@@ -282,19 +320,19 @@ class TrackNotifier extends Notifier<TrackState> {
           }
         }
       }
-      
+
       // Step 2: Try Deezer URL parsing
       if (url.contains('deezer.com') || url.contains('deezer.page.link')) {
         _log.i('Detected Deezer URL, parsing...');
         final parsed = await PlatformBridge.parseDeezerUrl(url);
         if (!_isRequestValid(requestId)) return;
-        
+
         final type = parsed['type'] as String;
         final id = parsed['id'] as String;
-        
+
         final metadata = await PlatformBridge.getDeezerMetadata(type, id);
         if (!_isRequestValid(requestId)) return;
-        
+
         if (type == 'track') {
           final trackData = metadata['track'] as Map<String, dynamic>;
           final track = _parseTrack(trackData);
@@ -306,7 +344,9 @@ class TrackNotifier extends Notifier<TrackState> {
         } else if (type == 'album') {
           final albumInfo = metadata['album_info'] as Map<String, dynamic>;
           final trackList = metadata['track_list'] as List<dynamic>;
-          final tracks = trackList.map((t) => _parseTrack(t as Map<String, dynamic>)).toList();
+          final tracks = trackList
+              .map((t) => _parseTrack(t as Map<String, dynamic>))
+              .toList();
           state = TrackState(
             tracks: tracks,
             isLoading: false,
@@ -316,9 +356,12 @@ class TrackNotifier extends Notifier<TrackState> {
           );
           _preWarmCacheForTracks(tracks);
         } else if (type == 'playlist') {
-          final playlistInfo = metadata['playlist_info'] as Map<String, dynamic>;
+          final playlistInfo =
+              metadata['playlist_info'] as Map<String, dynamic>;
           final trackList = metadata['track_list'] as List<dynamic>;
-          final tracks = trackList.map((t) => _parseTrack(t as Map<String, dynamic>)).toList();
+          final tracks = trackList
+              .map((t) => _parseTrack(t as Map<String, dynamic>))
+              .toList();
           state = TrackState(
             tracks: tracks,
             isLoading: false,
@@ -329,7 +372,9 @@ class TrackNotifier extends Notifier<TrackState> {
         } else if (type == 'artist') {
           final artistInfo = metadata['artist_info'] as Map<String, dynamic>;
           final albumsList = metadata['albums'] as List<dynamic>;
-          final albums = albumsList.map((a) => _parseArtistAlbum(a as Map<String, dynamic>)).toList();
+          final albums = albumsList
+              .map((a) => _parseArtistAlbum(a as Map<String, dynamic>))
+              .toList();
           state = TrackState(
             tracks: [],
             isLoading: false,
@@ -341,33 +386,38 @@ class TrackNotifier extends Notifier<TrackState> {
         }
         return;
       }
-      
+
       // Step 3: Try Tidal URL parsing
       if (url.contains('tidal.com')) {
         _log.i('Detected Tidal URL, parsing...');
         final parsed = await PlatformBridge.parseTidalUrl(url);
         if (!_isRequestValid(requestId)) return;
-        
+
         final type = parsed['type'] as String;
         final id = parsed['id'] as String;
-        
+
         _log.i('Tidal URL parsed: type=$type, id=$id');
-        
+
         // For track URLs, convert to Spotify/Deezer and fetch metadata from there
         if (type == 'track') {
           try {
             _log.i('Converting Tidal track to Spotify/Deezer via SongLink...');
-            final conversion = await PlatformBridge.convertTidalToSpotifyDeezer(url);
+            final conversion = await PlatformBridge.convertTidalToSpotifyDeezer(
+              url,
+            );
             if (!_isRequestValid(requestId)) return;
-            
+
             final spotifyUrl = conversion['spotify_url'] as String?;
             final deezerUrl = conversion['deezer_url'] as String?;
-            
+
             if (spotifyUrl != null && spotifyUrl.isNotEmpty) {
               _log.i('Found Spotify URL: $spotifyUrl, fetching metadata...');
-              final metadata = await PlatformBridge.getSpotifyMetadataWithFallback(spotifyUrl);
+              final metadata =
+                  await PlatformBridge.getSpotifyMetadataWithFallback(
+                    spotifyUrl,
+                  );
               if (!_isRequestValid(requestId)) return;
-              
+
               final trackData = metadata['track'] as Map<String, dynamic>;
               final track = _parseTrack(trackData);
               state = TrackState(
@@ -378,10 +428,15 @@ class TrackNotifier extends Notifier<TrackState> {
               return;
             } else if (deezerUrl != null && deezerUrl.isNotEmpty) {
               _log.i('Found Deezer URL: $deezerUrl, fetching metadata...');
-              final deezerParsed = await PlatformBridge.parseDeezerUrl(deezerUrl);
+              final deezerParsed = await PlatformBridge.parseDeezerUrl(
-              final metadata = await PlatformBridge.getDeezerMetadata('track', deezerParsed['id'] as String);
+                deezerUrl,
+              );
+              final metadata = await PlatformBridge.getDeezerMetadata(
+                'track',
+                deezerParsed['id'] as String,
+              );
               if (!_isRequestValid(requestId)) return;
-              
+
               final trackData = metadata['track'] as Map<String, dynamic>;
               final track = _parseTrack(trackData);
               state = TrackState(
@@ -395,30 +450,31 @@ class TrackNotifier extends Notifier<TrackState> {
             _log.w('Failed to convert Tidal URL via SongLink: $e');
           }
         }
-        
+
         // For album/artist/playlist, not yet supported
         state = TrackState(
           isLoading: false,
-          error: 'Tidal $type links are not fully supported yet. Only track links work via SongLink conversion.',
+          error:
+              'Tidal $type links are not fully supported yet. Only track links work via SongLink conversion.',
           hasSearchText: state.hasSearchText,
         );
         return;
       }
-      
+
       // Step 4: Fall back to Spotify parsing
       final parsed = await PlatformBridge.parseSpotifyUrl(url);
       if (!_isRequestValid(requestId)) return;
-      
+
       final type = parsed['type'] as String;
 
       Map<String, dynamic> metadata;
-      
+
       try {
         metadata = await PlatformBridge.getSpotifyMetadataWithFallback(url);
       } catch (e) {
         rethrow;
       }
-      
+
       if (!_isRequestValid(requestId)) return;
 
       if (type == 'track') {
@@ -432,7 +488,9 @@ class TrackNotifier extends Notifier<TrackState> {
       } else if (type == 'album') {
         final albumInfo = metadata['album_info'] as Map<String, dynamic>;
         final trackList = metadata['track_list'] as List<dynamic>;
-        final tracks = trackList.map((t) => _parseTrack(t as Map<String, dynamic>)).toList();
+        final tracks = trackList
+            .map((t) => _parseTrack(t as Map<String, dynamic>))
+            .toList();
         state = TrackState(
           tracks: tracks,
           isLoading: false,
@@ -444,7 +502,9 @@ class TrackNotifier extends Notifier<TrackState> {
       } else if (type == 'playlist') {
         final playlistInfo = metadata['playlist_info'] as Map<String, dynamic>;
         final trackList = metadata['track_list'] as List<dynamic>;
-        final tracks = trackList.map((t) => _parseTrack(t as Map<String, dynamic>)).toList();
+        final tracks = trackList
+            .map((t) => _parseTrack(t as Map<String, dynamic>))
+            .toList();
         final owner = playlistInfo['owner'] as Map<String, dynamic>?;
         state = TrackState(
           tracks: tracks,
@@ -456,7 +516,9 @@ class TrackNotifier extends Notifier<TrackState> {
       } else if (type == 'artist') {
         final artistInfo = metadata['artist_info'] as Map<String, dynamic>;
         final albumsList = metadata['albums'] as List<dynamic>;
-        final albums = albumsList.map((a) => _parseArtistAlbum(a as Map<String, dynamic>)).toList();
+        final albums = albumsList
+            .map((a) => _parseArtistAlbum(a as Map<String, dynamic>))
+            .toList();
         state = TrackState(
           tracks: [],
           isLoading: false,
@@ -468,17 +530,29 @@ class TrackNotifier extends Notifier<TrackState> {
       }
     } catch (e) {
       if (!_isRequestValid(requestId)) return;
-      state = TrackState(isLoading: false, error: e.toString(), hasSearchText: state.hasSearchText);
+      state = TrackState(
+        isLoading: false,
+        error: e.toString(),
+        hasSearchText: state.hasSearchText,
+      );
     }
   }
 
-  Future<void> search(String query, {String? metadataSource, String? filterOverride}) async {
+  Future<void> search(
+    String query, {
+    String? metadataSource,
+    String? filterOverride,
+  }) async {
     final requestId = ++_currentRequestId;
-    
+
     // Preserve selected filter during loading
     final currentFilter = filterOverride ?? state.selectedSearchFilter;
 
-    state = TrackState(isLoading: true, hasSearchText: state.hasSearchText, selectedSearchFilter: currentFilter);
+    state = TrackState(
+      isLoading: true,
+      hasSearchText: state.hasSearchText,
+      selectedSearchFilter: currentFilter,
+    );
 
     try {
       final settings = ref.read(settingsProvider);
@@ -494,20 +568,23 @@ class TrackNotifier extends Notifier<TrackState> {
           searchProvider.isNotEmpty;
 
       final source = metadataSource ?? 'deezer';
-      
+
       _log.i(
         'Search started: source=$source, query="$query", useExtensions=$useExtensions, filter=$currentFilter',
       );
-      
+
       Map<String, dynamic> results;
       List<Track> extensionTracks = [];
-      
+
       if (useExtensions) {
         try {
           _log.d('Calling extension search API...');
-          final extResults = await PlatformBridge.searchTracksWithExtensions(query, limit: 20);
+          final extResults = await PlatformBridge.searchTracksWithExtensions(
+            query,
+            limit: 20,
+          );
           _log.i('Extensions returned ${extResults.length} tracks');
-          
+
           for (final t in extResults) {
             try {
               extensionTracks.add(_parseSearchTrack(t));
@@ -519,37 +596,52 @@ class TrackNotifier extends Notifier<TrackState> {
           _log.w('Extension search failed, falling back to built-in: $e');
         }
       }
-      
+
       if (source == 'deezer') {
         _log.d('Calling Deezer search API...');
-        results = await PlatformBridge.searchDeezerAll(query, trackLimit: 20, artistLimit: 2, filter: currentFilter);
+        results = await PlatformBridge.searchDeezerAll(
-        _log.i('Deezer returned ${(results['tracks'] as List?)?.length ?? 0} tracks, ${(results['artists'] as List?)?.length ?? 0} artists, ${(results['albums'] as List?)?.length ?? 0} albums');
+          query,
+          trackLimit: 20,
+          artistLimit: 2,
+          filter: currentFilter,
+        );
+        _log.i(
+          'Deezer returned ${(results['tracks'] as List?)?.length ?? 0} tracks, ${(results['artists'] as List?)?.length ?? 0} artists, ${(results['albums'] as List?)?.length ?? 0} albums',
+        );
       } else {
         _log.d('Calling Spotify search API...');
-        results = await PlatformBridge.searchSpotifyAll(query, trackLimit: 20, artistLimit: 2);
+        results = await PlatformBridge.searchSpotifyAll(
-        _log.i('Spotify returned ${(results['tracks'] as List?)?.length ?? 0} tracks, ${(results['artists'] as List?)?.length ?? 0} artists');
+          query,
+          trackLimit: 20,
+          artistLimit: 2,
+        );
+        _log.i(
+          'Spotify returned ${(results['tracks'] as List?)?.length ?? 0} tracks, ${(results['artists'] as List?)?.length ?? 0} artists',
+        );
       }
-      
+
       if (!_isRequestValid(requestId)) {
         _log.w('Search request cancelled (requestId=$requestId)');
         return;
       }
-      
+
       final trackList = results['tracks'] as List<dynamic>? ?? [];
       final artistList = results['artists'] as List<dynamic>? ?? [];
       final albumList = results['albums'] as List<dynamic>? ?? [];
-      
+
-      _log.d('Raw results: ${trackList.length} tracks, ${artistList.length} artists, ${albumList.length} albums');
+      _log.d(
-      
+        'Raw results: ${trackList.length} tracks, ${artistList.length} artists, ${albumList.length} albums',
+      );
+
       final tracks = <Track>[];
-      
+
       tracks.addAll(extensionTracks);
-      
+
       final existingIsrcs = extensionTracks
           .where((t) => t.isrc != null && t.isrc!.isNotEmpty)
           .map((t) => t.isrc!)
           .toSet();
-      
+
       for (int i = 0; i < trackList.length; i++) {
         final t = trackList[i];
         try {
@@ -566,7 +658,7 @@ class TrackNotifier extends Notifier<TrackState> {
           _log.e('Failed to parse track[$i]: $e', e);
         }
       }
-      
+
       final artists = <SearchArtist>[];
       for (int i = 0; i < artistList.length; i++) {
         final a = artistList[i];
@@ -580,7 +672,7 @@ class TrackNotifier extends Notifier<TrackState> {
           _log.e('Failed to parse artist[$i]: $e', e);
         }
       }
-      
+
       final albums = <SearchAlbum>[];
       for (int i = 0; i < albumList.length; i++) {
         final a = albumList[i];
@@ -594,7 +686,7 @@ class TrackNotifier extends Notifier<TrackState> {
           _log.e('Failed to parse album[$i]: $e', e);
         }
       }
-      
+
       final playlistList = results['playlists'] as List<dynamic>? ?? [];
       final playlists = <SearchPlaylist>[];
       for (int i = 0; i < playlistList.length; i++) {
@@ -609,9 +701,11 @@ class TrackNotifier extends Notifier<TrackState> {
           _log.e('Failed to parse playlist[$i]: $e', e);
         }
       }
-      
+
-      _log.i('Search complete: ${tracks.length} tracks (${extensionTracks.length} from extensions), ${artists.length} artists, ${albums.length} albums, ${playlists.length} playlists parsed successfully');
+      _log.i(
-      
+        'Search complete: ${tracks.length} tracks (${extensionTracks.length} from extensions), ${artists.length} artists, ${albums.length} albums, ${playlists.length} playlists parsed successfully',
+      );
+
       state = TrackState(
         tracks: tracks,
         searchArtists: artists,
@@ -624,31 +718,45 @@ class TrackNotifier extends Notifier<TrackState> {
     } catch (e, stackTrace) {
       if (!_isRequestValid(requestId)) return;
       _log.e('Search failed: $e', e, stackTrace);
-      state = TrackState(isLoading: false, error: e.toString(), hasSearchText: state.hasSearchText, selectedSearchFilter: currentFilter);
+      state = TrackState(
+        isLoading: false,
+        error: e.toString(),
+        hasSearchText: state.hasSearchText,
+        selectedSearchFilter: currentFilter,
+      );
     }
   }
 
-  Future<void> customSearch(String extensionId, String query, {Map<String, dynamic>? options}) async {
+  Future<void> customSearch(
+    String extensionId,
+    String query, {
+    Map<String, dynamic>? options,
+  }) async {
     final requestId = ++_currentRequestId;
 
     state = TrackState(
       isLoading: true,
       hasSearchText: state.hasSearchText,
-      selectedSearchFilter: state.selectedSearchFilter, // Preserve filter during loading
+      selectedSearchFilter:
+          state.selectedSearchFilter, // Preserve filter during loading
     );
 
     try {
       _log.i('Custom search started: extension=$extensionId, query="$query"');
-      
+
-      final results = await PlatformBridge.customSearchWithExtension(extensionId, query, options: options);
+      final results = await PlatformBridge.customSearchWithExtension(
-      
+        extensionId,
+        query,
+        options: options,
+      );
+
       if (!_isRequestValid(requestId)) {
         _log.w('Custom search request cancelled (requestId=$requestId)');
         return;
       }
-      
+
       _log.i('Custom search returned ${results.length} tracks');
-      
+
       final tracks = <Track>[];
       for (int i = 0; i < results.length; i++) {
         final t = results[i];
@@ -658,21 +766,28 @@ class TrackNotifier extends Notifier<TrackState> {
           _log.e('Failed to parse custom search track[$i]: $e', e);
         }
       }
-      
+
-      _log.i('Custom search complete: ${tracks.length} tracks parsed (source=$extensionId)');
+      _log.i(
-      
+        'Custom search complete: ${tracks.length} tracks parsed (source=$extensionId)',
+      );
+
       state = TrackState(
         tracks: tracks,
         searchArtists: [],
         isLoading: false,
         hasSearchText: state.hasSearchText,
         searchExtensionId: extensionId, // Store which extension was used
-        selectedSearchFilter: state.selectedSearchFilter, // Preserve selected filter
+        selectedSearchFilter:
+            state.selectedSearchFilter, // Preserve selected filter
       );
     } catch (e, stackTrace) {
       if (!_isRequestValid(requestId)) return;
       _log.e('Custom search failed: $e', e, stackTrace);
-      state = TrackState(isLoading: false, error: e.toString(), hasSearchText: state.hasSearchText);
+      state = TrackState(
+        isLoading: false,
+        error: e.toString(),
+        hasSearchText: state.hasSearchText,
+      );
     }
   }
 
@@ -683,7 +798,10 @@ class TrackNotifier extends Notifier<TrackState> {
     if (track.isrc == null || track.isrc!.isEmpty) return;
 
     try {
-      final availability = await PlatformBridge.checkAvailability(track.id, track.isrc!);
+      final availability = await PlatformBridge.checkAvailability(
+        track.id,
+        track.isrc!,
+      );
       final updatedTrack = Track(
         id: track.id,
         name: track.name,
@@ -736,11 +854,14 @@ class TrackNotifier extends Notifier<TrackState> {
     }
     state = state.copyWith(hasSearchText: hasText);
   }
-  
+
   void setShowingRecentAccess(bool showing) {
+    if (state.isShowingRecentAccess == showing) {
+      return;
+    }
     state = state.copyWith(isShowingRecentAccess: showing);
   }
-  
+
   /// Set tracks from a collection (album/playlist) opened from search results
   void setTracksFromCollection({
     required List<Track> tracks,
@@ -782,9 +903,9 @@ class TrackNotifier extends Notifier<TrackState> {
     } else if (durationValue is double) {
       durationMs = durationValue.toInt();
     }
-    
+
     final itemType = data['item_type']?.toString();
-    
+
     return Track(
       id: (data['spotify_id'] ?? data['id'] ?? '').toString(),
       name: (data['name'] ?? '').toString(),
@@ -797,7 +918,10 @@ class TrackNotifier extends Notifier<TrackState> {
       trackNumber: data['track_number'] as int?,
       discNumber: data['disc_number'] as int?,
       releaseDate: data['release_date']?.toString(),
-      source: source ?? data['source']?.toString() ?? data['provider_id']?.toString(),
+      source:
+          source ??
+          data['source']?.toString() ??
+          data['provider_id']?.toString(),
       albumType: data['album_type']?.toString(),
       itemType: itemType,
     );
@@ -849,16 +973,25 @@ class TrackNotifier extends Notifier<TrackState> {
   }
 
   void _preWarmCacheForTracks(List<Track> tracks) {
-    final tracksWithIsrc = tracks.where((t) => t.isrc != null && t.isrc!.isNotEmpty).toList();
+    if (tracks.isEmpty) return;
-    if (tracksWithIsrc.isEmpty) return;
+    final cacheRequests = <Map<String, String>>[];
-
+    for (final track in tracks) {
-    final cacheRequests = tracksWithIsrc.map((t) => {
+      final isrc = track.isrc;
-      'isrc': t.isrc!,
+      if (isrc == null || isrc.isEmpty) {
-      'track_name': t.name,
+        continue;
-      'artist_name': t.artistName,
+      }
-      'spotify_id': t.id, // Include Spotify ID for Amazon lookup
+      cacheRequests.add({
-      'service': 'tidal',
+        'isrc': isrc,
-    }).toList();
+        'track_name': track.name,
+        'artist_name': track.artistName,
+        'spotify_id': track.id, // Include Spotify ID for Amazon lookup
+        'service': 'tidal',
+      });
+      if (cacheRequests.length >= _maxPreWarmTracksPerRequest) {
+        break;
+      }
+    }
+    if (cacheRequests.isEmpty) return;
 
     PlatformBridge.preWarmTrackCache(cacheRequests).catchError((_) {});
   }

lib/screens/album_screen.dart

@@ -268,6 +268,13 @@ class _AlbumScreenState extends ConsumerState<AlbumScreen> {
               (constraints.maxHeight - kToolbarHeight) /
               (expandedHeight - kToolbarHeight);
           final showContent = collapseRatio > 0.3;
+          final dpr = MediaQuery.devicePixelRatioOf(
+            context,
+          ).clamp(1.0, 3.0).toDouble();
+          final backgroundMemCacheWidth = (constraints.maxWidth * dpr)
+              .round()
+              .clamp(720, 1440)
+              .toInt();
 
           return FlexibleSpaceBar(
             collapseMode: CollapseMode.none,
@@ -279,6 +286,7 @@ class _AlbumScreenState extends ConsumerState<AlbumScreen> {
                   CachedNetworkImage(
                     imageUrl: widget.coverUrl!,
                     fit: BoxFit.cover,
+                    memCacheWidth: backgroundMemCacheWidth,
                     cacheManager: CoverCacheManager.instance,
                     placeholder: (_, _) =>
                         Container(color: colorScheme.surface),

lib/screens/downloaded_album_screen.dart

@@ -1,3 +1,4 @@
+import 'dart:io';
 import 'dart:ui';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -8,6 +9,7 @@ import 'package:spotiflac_android/l10n/l10n.dart';
 import 'package:spotiflac_android/utils/file_access.dart';
 import 'package:spotiflac_android/providers/download_queue_provider.dart';
 import 'package:spotiflac_android/screens/track_metadata_screen.dart';
+import 'package:spotiflac_android/services/downloaded_embedded_cover_resolver.dart';
 
 /// Screen to display downloaded tracks from a specific album
 class DownloadedAlbumScreen extends ConsumerStatefulWidget {
@@ -32,6 +34,20 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
   final Set<String> _selectedIds = {};
   bool _showTitleInAppBar = false;
   final ScrollController _scrollController = ScrollController();
+  bool _embeddedCoverRefreshScheduled = false;
+  List<DownloadHistoryItem>? _albumTracksSourceCache;
+  List<DownloadHistoryItem>? _albumTracksCache;
+  List<DownloadHistoryItem>? _discGroupingSourceCache;
+  Map<int, List<DownloadHistoryItem>>? _discGroupingCache;
+  List<int>? _sortedDiscNumbersCache;
+  List<DownloadHistoryItem>? _commonQualitySourceCache;
+  String? _commonQualityCache;
+  List<DownloadHistoryItem>? _embeddedCoverSourceCache;
+  String? _embeddedCoverPathCache;
+  bool _embeddedCoverPathResolved = false;
+
+  String get _albumLookupKey =>
+      '${widget.albumName.toLowerCase()}|${widget.artistName.toLowerCase()}';
 
   @override
   void initState() {
@@ -46,6 +62,17 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
     super.dispose();
   }
 
+  @override
+  void didUpdateWidget(covariant DownloadedAlbumScreen oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.albumName != widget.albumName ||
+        oldWidget.artistName != widget.artistName) {
+      _albumTracksSourceCache = null;
+      _albumTracksCache = null;
+      _invalidateDerivedTrackCaches();
+    }
+  }
+
   void _onScroll() {
     final shouldShow = _scrollController.offset > 280;
     if (shouldShow != _showTitleInAppBar) {
@@ -57,41 +84,74 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
   List<DownloadHistoryItem> _getAlbumTracks(
     List<DownloadHistoryItem> allItems,
   ) {
-    return allItems.where((item) {
+    final cached = _albumTracksCache;
-      // Use albumArtist if available and not empty, otherwise artistName
+    if (cached != null && identical(allItems, _albumTracksSourceCache)) {
-      final itemArtist =
+      return cached;
-          (item.albumArtist != null && item.albumArtist!.isNotEmpty)
+    }
-          ? item.albumArtist!
+
-          : item.artistName;
+    final tracks =
-      // Use lowercase for case-insensitive matching
+        allItems.where((item) {
-      final itemKey =
+          // Use albumArtist if available and not empty, otherwise artistName
-          '${item.albumName.toLowerCase()}|${itemArtist.toLowerCase()}';
+          final itemArtist =
-      final albumKey =
+              (item.albumArtist != null && item.albumArtist!.isNotEmpty)
-          '${widget.albumName.toLowerCase()}|${widget.artistName.toLowerCase()}';
+              ? item.albumArtist!
-      return itemKey == albumKey;
+              : item.artistName;
-    }).toList()..sort((a, b) {
+          // Use lowercase for case-insensitive matching
-      // Sort by disc number first, then by track number
+          final itemKey =
-      final aDisc = a.discNumber ?? 1;
+              '${item.albumName.toLowerCase()}|${itemArtist.toLowerCase()}';
-      final bDisc = b.discNumber ?? 1;
+          return itemKey == _albumLookupKey;
-      if (aDisc != bDisc) return aDisc.compareTo(bDisc);
+        }).toList()..sort((a, b) {
-      final aNum = a.trackNumber ?? 999;
+          // Sort by disc number first, then by track number
-      final bNum = b.trackNumber ?? 999;
+          final aDisc = a.discNumber ?? 1;
-      if (aNum != bNum) return aNum.compareTo(bNum);
+          final bDisc = b.discNumber ?? 1;
-      return a.trackName.compareTo(b.trackName);
+          if (aDisc != bDisc) return aDisc.compareTo(bDisc);
-    });
+          final aNum = a.trackNumber ?? 999;
+          final bNum = b.trackNumber ?? 999;
+          if (aNum != bNum) return aNum.compareTo(bNum);
+          return a.trackName.compareTo(b.trackName);
+        });
+
+    _albumTracksSourceCache = allItems;
+    _albumTracksCache = tracks;
+    _invalidateDerivedTrackCaches();
+    return tracks;
   }
 
-  Map<int, List<DownloadHistoryItem>> _groupTracksByDisc(
+  void _invalidateDerivedTrackCaches() {
+    _discGroupingSourceCache = null;
+    _discGroupingCache = null;
+    _sortedDiscNumbersCache = null;
+    _commonQualitySourceCache = null;
+    _commonQualityCache = null;
+    _embeddedCoverSourceCache = null;
+    _embeddedCoverPathCache = null;
+    _embeddedCoverPathResolved = false;
+  }
+
+  Map<int, List<DownloadHistoryItem>> _getDiscGroups(
     List<DownloadHistoryItem> tracks,
   ) {
+    final cached = _discGroupingCache;
+    if (cached != null && identical(tracks, _discGroupingSourceCache)) {
+      return cached;
+    }
+
     final discMap = <int, List<DownloadHistoryItem>>{};
     for (final track in tracks) {
       final discNumber = track.discNumber ?? 1;
       discMap.putIfAbsent(discNumber, () => []).add(track);
     }
+    _discGroupingSourceCache = tracks;
+    _discGroupingCache = discMap;
+    _sortedDiscNumbersCache = discMap.keys.toList()..sort();
     return discMap;
   }
 
+  List<int> _getSortedDiscNumbers(List<DownloadHistoryItem> tracks) {
+    _getDiscGroups(tracks);
+    return _sortedDiscNumbersCache ?? const [];
+  }
+
   void _enterSelectionMode(String itemId) {
     HapticFeedback.mediumImpact();
     setState(() {
@@ -152,10 +212,11 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
     if (confirmed == true && mounted) {
       final historyNotifier = ref.read(downloadHistoryProvider.notifier);
       final idsToDelete = _selectedIds.toList();
+      final tracksById = {for (final track in currentTracks) track.id: track};
 
       int deletedCount = 0;
       for (final id in idsToDelete) {
-        final item = currentTracks.where((e) => e.id == id).firstOrNull;
+        final item = tracksById[id];
         if (item != null) {
           try {
             await deleteFile(item.filePath);
@@ -191,10 +252,28 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
     }
   }
 
-  void _navigateToMetadataScreen(DownloadHistoryItem item) {
+  void _onEmbeddedCoverChanged() {
+    if (!mounted || _embeddedCoverRefreshScheduled) return;
+    _embeddedCoverRefreshScheduled = true;
+    _embeddedCoverPathResolved = false;
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      _embeddedCoverRefreshScheduled = false;
+      if (mounted) {
+        setState(() {});
+      }
+    });
+  }
+
+  Future<void> _navigateToMetadataScreen(DownloadHistoryItem item) async {
+    final navigator = Navigator.of(context);
     _precacheCover(item.coverUrl);
-    Navigator.push(
+    final beforeModTime =
-      context,
+        await DownloadedEmbeddedCoverResolver.readFileModTimeMillis(
+          item.filePath,
+        );
+    if (!mounted) return;
+
+    final result = await navigator.push(
       PageRouteBuilder(
         transitionDuration: const Duration(milliseconds: 300),
         reverseTransitionDuration: const Duration(milliseconds: 250),
@@ -204,6 +283,12 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
             FadeTransition(opacity: animation, child: child),
       ),
     );
+    await DownloadedEmbeddedCoverResolver.scheduleRefreshForPath(
+      item.filePath,
+      beforeModTime: beforeModTime,
+      force: result == true,
+      onChanged: _onEmbeddedCoverChanged,
+    );
   }
 
   void _precacheCover(String? url) {
@@ -211,8 +296,19 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
     if (!url.startsWith('http://') && !url.startsWith('https://')) {
       return;
     }
+    final dpr = MediaQuery.devicePixelRatioOf(
+      context,
+    ).clamp(1.0, 3.0).toDouble();
+    final targetSize = (360 * dpr).round().clamp(512, 1024).toInt();
     precacheImage(
-      CachedNetworkImageProvider(url, cacheManager: CoverCacheManager.instance),
+      ResizeImage(
+        CachedNetworkImageProvider(
+          url,
+          cacheManager: CoverCacheManager.instance,
+        ),
+        width: targetSize,
+        height: targetSize,
+      ),
       context,
     );
   }
@@ -256,7 +352,7 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
             CustomScrollView(
               controller: _scrollController,
               slivers: [
-                _buildAppBar(context, colorScheme),
+                _buildAppBar(context, colorScheme, tracks),
                 _buildInfoCard(context, colorScheme, tracks),
                 _buildTrackListHeader(context, colorScheme, tracks),
                 _buildTrackList(context, colorScheme, tracks),
@@ -285,7 +381,32 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
     );
   }
 
-  Widget _buildAppBar(BuildContext context, ColorScheme colorScheme) {
+  String? _resolveAlbumEmbeddedCoverPath(List<DownloadHistoryItem> tracks) {
+    if (_embeddedCoverPathResolved &&
+        identical(tracks, _embeddedCoverSourceCache)) {
+      return _embeddedCoverPathCache;
+    }
+
+    _embeddedCoverSourceCache = tracks;
+    _embeddedCoverPathResolved = true;
+
+    if (tracks.isEmpty) {
+      _embeddedCoverPathCache = null;
+      return null;
+    }
+
+    _embeddedCoverPathCache = DownloadedEmbeddedCoverResolver.resolve(
+      tracks.first.filePath,
+      onChanged: _onEmbeddedCoverChanged,
+    );
+    return _embeddedCoverPathCache;
+  }
+
+  Widget _buildAppBar(
+    BuildContext context,
+    ColorScheme colorScheme,
+    List<DownloadHistoryItem> tracks,
+  ) {
     final mediaSize = MediaQuery.of(context).size;
     final screenWidth = mediaSize.width;
     final shortestSide = mediaSize.shortestSide;
@@ -294,6 +415,7 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
     final bottomGradientHeight = (shortestSide * 0.2).clamp(56.0, 80.0);
     final coverTopPadding = (shortestSide * 0.14).clamp(40.0, 60.0);
     final fallbackIconSize = (coverSize * 0.32).clamp(44.0, 64.0);
+    final embeddedCoverPath = _resolveAlbumEmbeddedCoverPath(tracks);
 
     return SliverAppBar(
       expandedHeight: expandedHeight,
@@ -322,6 +444,13 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
               (constraints.maxHeight - kToolbarHeight) /
               (expandedHeight - kToolbarHeight);
           final showContent = collapseRatio > 0.3;
+          final dpr = MediaQuery.devicePixelRatioOf(
+            context,
+          ).clamp(1.0, 3.0).toDouble();
+          final backgroundMemCacheWidth = (constraints.maxWidth * dpr)
+              .round()
+              .clamp(720, 1440)
+              .toInt();
 
           return FlexibleSpaceBar(
             collapseMode: CollapseMode.none,
@@ -329,10 +458,19 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
               fit: StackFit.expand,
               children: [
                 // Blurred cover background
-                if (widget.coverUrl != null)
+                if (embeddedCoverPath != null)
+                  Image.file(
+                    File(embeddedCoverPath),
+                    fit: BoxFit.cover,
+                    cacheWidth: backgroundMemCacheWidth,
+                    errorBuilder: (_, _, _) =>
+                        Container(color: colorScheme.surface),
+                  )
+                else if (widget.coverUrl != null)
                   CachedNetworkImage(
                     imageUrl: widget.coverUrl!,
                     fit: BoxFit.cover,
+                    memCacheWidth: backgroundMemCacheWidth,
                     cacheManager: CoverCacheManager.instance,
                     placeholder: (_, _) =>
                         Container(color: colorScheme.surface),
@@ -389,7 +527,22 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
                         ),
                         child: ClipRRect(
                           borderRadius: BorderRadius.circular(20),
-                          child: widget.coverUrl != null
+                          child: embeddedCoverPath != null
+                              ? Image.file(
+                                  File(embeddedCoverPath),
+                                  fit: BoxFit.cover,
+                                  cacheWidth: (coverSize * 2).toInt(),
+                                  cacheHeight: (coverSize * 2).toInt(),
+                                  errorBuilder: (_, _, _) => Container(
+                                    color: colorScheme.surfaceContainerHighest,
+                                    child: Icon(
+                                      Icons.album,
+                                      size: fallbackIconSize,
+                                      color: colorScheme.onSurfaceVariant,
+                                    ),
+                                  ),
+                                )
+                              : widget.coverUrl != null
                               ? CachedNetworkImage(
                                   imageUrl: widget.coverUrl!,
                                   fit: BoxFit.cover,
@@ -437,6 +590,8 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
     ColorScheme colorScheme,
     List<DownloadHistoryItem> tracks,
   ) {
+    final commonQuality = _getCommonQuality(tracks);
+
     return SliverToBoxAdapter(
       child: Padding(
         padding: const EdgeInsets.all(16),
@@ -500,22 +655,22 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
                       ),
                     ),
                     const SizedBox(width: 8),
-                    if (_getCommonQuality(tracks) != null)
+                    if (commonQuality != null)
                       Container(
                         padding: const EdgeInsets.symmetric(
                           horizontal: 12,
                           vertical: 6,
                         ),
                         decoration: BoxDecoration(
-                          color: _getCommonQuality(tracks)!.startsWith('24')
+                          color: commonQuality.startsWith('24')
                               ? colorScheme.tertiaryContainer
                               : colorScheme.surfaceContainerHighest,
                           borderRadius: BorderRadius.circular(20),
                         ),
                         child: Text(
-                          _getCommonQuality(tracks)!,
+                          commonQuality,
                           style: TextStyle(
-                            color: _getCommonQuality(tracks)!.startsWith('24')
+                            color: commonQuality.startsWith('24')
                                 ? colorScheme.onTertiaryContainer
                                 : colorScheme.onSurfaceVariant,
                             fontWeight: FontWeight.w600,
@@ -534,12 +689,30 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
   }
 
   String? _getCommonQuality(List<DownloadHistoryItem> tracks) {
-    if (tracks.isEmpty) return null;
+    if (identical(tracks, _commonQualitySourceCache)) {
-    final firstQuality = tracks.first.quality;
+      return _commonQualityCache;
-    if (firstQuality == null) return null;
-    for (final track in tracks) {
-      if (track.quality != firstQuality) return null;
     }
+
+    if (tracks.isEmpty) {
+      _commonQualitySourceCache = tracks;
+      _commonQualityCache = null;
+      return null;
+    }
+    final firstQuality = tracks.first.quality;
+    if (firstQuality == null) {
+      _commonQualitySourceCache = tracks;
+      _commonQualityCache = null;
+      return null;
+    }
+    for (final track in tracks) {
+      if (track.quality != firstQuality) {
+        _commonQualitySourceCache = tracks;
+        _commonQualityCache = null;
+        return null;
+      }
+    }
+    _commonQualitySourceCache = tracks;
+    _commonQualityCache = firstQuality;
     return firstQuality;
   }
 
@@ -585,7 +758,7 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
     ColorScheme colorScheme,
     List<DownloadHistoryItem> tracks,
   ) {
-    final discMap = _groupTracksByDisc(tracks);
+    final discMap = _getDiscGroups(tracks);
 
     if (discMap.length <= 1) {
       return SliverList(
@@ -599,7 +772,7 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen> {
       );
     }
 
-    final discNumbers = discMap.keys.toList()..sort();
+    final discNumbers = _getSortedDiscNumbers(tracks);
     final List<Widget> children = [];
 
     for (final discNumber in discNumbers) {

lib/screens/home_tab.dart

@@ -18,6 +18,7 @@ import 'package:spotiflac_android/screens/track_metadata_screen.dart';
 import 'package:spotiflac_android/screens/album_screen.dart';
 import 'package:spotiflac_android/screens/artist_screen.dart';
 import 'package:spotiflac_android/services/csv_import_service.dart';
+import 'package:spotiflac_android/services/downloaded_embedded_cover_resolver.dart';
 import 'package:spotiflac_android/services/platform_bridge.dart';
 import 'package:spotiflac_android/utils/app_bar_layout.dart';
 import 'package:spotiflac_android/utils/file_access.dart';
@@ -34,16 +35,25 @@ class HomeTab extends ConsumerStatefulWidget {
 
 class _RecentAccessView {
   final List<RecentAccessItem> uniqueItems;
-  final List<RecentAccessItem> downloadItems;
+  final List<String> downloadIds;
+  final Map<String, String> downloadFilePathByRecentKey;
   final bool hasHiddenDownloads;
 
   const _RecentAccessView({
     required this.uniqueItems,
-    required this.downloadItems,
+    required this.downloadIds,
+    required this.downloadFilePathByRecentKey,
     required this.hasHiddenDownloads,
   });
 }
 
+class _RecentAlbumAggregate {
+  int count;
+  DownloadHistoryItem mostRecent;
+
+  _RecentAlbumAggregate({required this.count, required this.mostRecent});
+}
+
 class _CsvImportOptions {
   final bool confirmed;
   final bool skipDownloaded;
@@ -57,7 +67,6 @@ class _CsvImportOptions {
 class _HomeTabState extends ConsumerState<HomeTab>
     with AutomaticKeepAliveClientMixin, SingleTickerProviderStateMixin {
   final _urlController = TextEditingController();
-  bool _isTyping = false;
   final FocusNode _searchFocusNode = FocusNode();
   String? _lastSearchQuery;
   late final ProviderSubscription<TrackState> _trackStateSub;
@@ -74,6 +83,9 @@ class _HomeTabState extends ConsumerState<HomeTab>
   List<RecentAccessItem>? _recentAccessItemsCache;
   Set<String>? _recentAccessHiddenIdsCache;
   _RecentAccessView? _recentAccessViewCache;
+  bool _embeddedCoverRefreshScheduled = false;
+  List<Extension>? _thumbnailSizesExtensionsCache;
+  Map<String, (double, double)>? _thumbnailSizesCache;
 
   double _responsiveScale({
     required BuildContext context,
@@ -197,6 +209,27 @@ class _HomeTabState extends ConsumerState<HomeTab>
     super.dispose();
   }
 
+  Map<String, (double, double)> _getThumbnailSizesByExtensionId(
+    List<Extension> extensions,
+  ) {
+    final cached = _thumbnailSizesCache;
+    if (cached != null &&
+        identical(extensions, _thumbnailSizesExtensionsCache)) {
+      return cached;
+    }
+
+    final map = <String, (double, double)>{
+      for (final extension in extensions)
+        if (extension.searchBehavior != null)
+          extension.id: extension.searchBehavior!.getThumbnailSize(
+            defaultSize: 56,
+          ),
+    };
+    _thumbnailSizesExtensionsCache = extensions;
+    _thumbnailSizesCache = map;
+    return map;
+  }
+
   void _onSearchFocusChanged() {
     if (mounted) {
       setState(() {});
@@ -214,7 +247,6 @@ class _HomeTabState extends ConsumerState<HomeTab>
         _urlController.text.isNotEmpty &&
         !_searchFocusNode.hasFocus) {
       _urlController.clear();
-      setState(() => _isTyping = false);
     }
   }
 
@@ -237,10 +269,7 @@ class _HomeTabState extends ConsumerState<HomeTab>
 
     ref.read(trackProvider.notifier).setSearchText(text.isNotEmpty);
 
-    if (text.isNotEmpty && !_isTyping) {
+    if (text.isEmpty) {
-      setState(() => _isTyping = true);
-    } else if (text.isEmpty && _isTyping) {
-      setState(() => _isTyping = false);
       _liveSearchDebounce?.cancel();
       return;
     }
@@ -347,7 +376,6 @@ class _HomeTabState extends ConsumerState<HomeTab>
     _urlController.clear();
     _searchFocusNode.unfocus();
     _lastSearchQuery = null;
-    setState(() => _isTyping = false);
     ref.read(trackProvider.notifier).clear();
   }
 
@@ -387,7 +415,6 @@ class _HomeTabState extends ConsumerState<HomeTab>
       );
       ref.read(trackProvider.notifier).clear();
       _urlController.clear();
-      setState(() => _isTyping = false);
       return;
     }
 
@@ -413,7 +440,6 @@ class _HomeTabState extends ConsumerState<HomeTab>
       );
       ref.read(trackProvider.notifier).clear();
       _urlController.clear();
-      setState(() => _isTyping = false);
       return;
     }
 
@@ -435,7 +461,6 @@ class _HomeTabState extends ConsumerState<HomeTab>
       );
       ref.read(trackProvider.notifier).clear();
       _urlController.clear();
-      setState(() => _isTyping = false);
       return;
     }
   }
@@ -778,13 +803,9 @@ class _HomeTabState extends ConsumerState<HomeTab>
     );
     final showLocalLibraryIndicator =
         localLibrarySettings.$1 && localLibrarySettings.$2;
-    final thumbnailSizesByExtensionId = <String, (double, double)>{
+    final thumbnailSizesByExtensionId = _getThumbnailSizesByExtensionId(
-      for (final extension in extensions)
+      extensions,
-        if (extension.searchBehavior != null)
+    );
-          extension.id: extension.searchBehavior!.getThumbnailSize(
-            defaultSize: 56,
-          ),
-    };
     Extension? currentSearchExtension;
     List<SearchFilter> searchFilters = [];
 
@@ -932,7 +953,9 @@ class _HomeTabState extends ConsumerState<HomeTab>
               ),
 
               // Search filter bar (only shown when has search results)
-              if (searchFilters.isNotEmpty && hasActualResults && !showRecentAccess)
+              if (searchFilters.isNotEmpty &&
+                  hasActualResults &&
+                  !showRecentAccess)
                 SliverToBoxAdapter(
                   child: _buildSearchFilterBar(
                     searchFilters,
@@ -1022,6 +1045,17 @@ class _HomeTabState extends ConsumerState<HomeTab>
     );
   }
 
+  void _onEmbeddedCoverChanged() {
+    if (!mounted || _embeddedCoverRefreshScheduled) return;
+    _embeddedCoverRefreshScheduled = true;
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      _embeddedCoverRefreshScheduled = false;
+      if (mounted) {
+        setState(() {});
+      }
+    });
+  }
+
   Widget _buildRecentDownloads(
     List<DownloadHistoryItem> items,
     ColorScheme colorScheme,
@@ -1049,6 +1083,10 @@ class _HomeTabState extends ConsumerState<HomeTab>
             itemCount: itemCount,
             itemBuilder: (context, index) {
               final item = items[index];
+              final embeddedCoverPath = DownloadedEmbeddedCoverResolver.resolve(
+                item.filePath,
+                onChanged: _onEmbeddedCoverChanged,
+              );
               return KeyedSubtree(
                 key: ValueKey(item.id),
                 child: GestureDetector(
@@ -1060,7 +1098,26 @@ class _HomeTabState extends ConsumerState<HomeTab>
                       children: [
                         ClipRRect(
                           borderRadius: BorderRadius.circular(12),
-                          child: item.coverUrl != null
+                          child: embeddedCoverPath != null
+                              ? Image.file(
+                                  File(embeddedCoverPath),
+                                  width: coverSize,
+                                  height: coverSize,
+                                  fit: BoxFit.cover,
+                                  cacheWidth: (coverSize * 2).round(),
+                                  cacheHeight: (coverSize * 2).round(),
+                                  errorBuilder: (_, _, _) => Container(
+                                    width: coverSize,
+                                    height: coverSize,
+                                    color: colorScheme.surfaceContainerHighest,
+                                    child: Icon(
+                                      Icons.music_note,
+                                      color: colorScheme.onSurfaceVariant,
+                                      size: 32,
+                                    ),
+                                  ),
+                                )
+                              : item.coverUrl != null
                               ? CachedNetworkImage(
                                   imageUrl: item.coverUrl!,
                                   width: coverSize,
@@ -1115,63 +1172,58 @@ class _HomeTabState extends ConsumerState<HomeTab>
       return cached;
     }
 
-    final albumGroups = <String, List<DownloadHistoryItem>>{};
+    final albumGroups = <String, _RecentAlbumAggregate>{};
     for (final h in historyItems) {
       final artistForKey = (h.albumArtist != null && h.albumArtist!.isNotEmpty)
           ? h.albumArtist!
           : h.artistName;
       final albumKey = '${h.albumName}|$artistForKey';
-      albumGroups.putIfAbsent(albumKey, () => []).add(h);
+      final existing = albumGroups[albumKey];
+      if (existing == null) {
+        albumGroups[albumKey] = _RecentAlbumAggregate(count: 1, mostRecent: h);
+      } else {
+        existing.count++;
+        if (h.downloadedAt.isAfter(existing.mostRecent.downloadedAt)) {
+          existing.mostRecent = h;
+        }
+      }
     }
 
-    final downloadItems = <RecentAccessItem>[];
+    final downloadIds = <String>[];
-    for (final entry in albumGroups.entries) {
+    final visibleDownloads = <RecentAccessItem>[];
-      final tracks = entry.value;
+    final downloadFilePathByRecentKey = <String, String>{};
-      final mostRecent = tracks.reduce(
+    for (final aggregate in albumGroups.values) {
-        (a, b) => a.downloadedAt.isAfter(b.downloadedAt) ? a : b,
+      final mostRecent = aggregate.mostRecent;
-      );
       final artistForKey =
           (mostRecent.albumArtist != null && mostRecent.albumArtist!.isNotEmpty)
           ? mostRecent.albumArtist!
           : mostRecent.artistName;
 
-      if (tracks.length == 1) {
+      final isSingleTrack = aggregate.count == 1;
-        downloadItems.add(
+      final recentId = isSingleTrack
-          RecentAccessItem(
+          ? (mostRecent.spotifyId ?? mostRecent.id)
-            id: mostRecent.spotifyId ?? mostRecent.id,
+          : '${mostRecent.albumName}|$artistForKey';
-            name: mostRecent.trackName,
+      final recent = RecentAccessItem(
-            subtitle: mostRecent.artistName,
+        id: recentId,
-            imageUrl: mostRecent.coverUrl,
+        name: isSingleTrack ? mostRecent.trackName : mostRecent.albumName,
-            type: RecentAccessType.track,
+        subtitle: isSingleTrack ? mostRecent.artistName : artistForKey,
-            accessedAt: mostRecent.downloadedAt,
+        imageUrl: mostRecent.coverUrl,
-            providerId: 'download',
+        type: isSingleTrack ? RecentAccessType.track : RecentAccessType.album,
-          ),
+        accessedAt: mostRecent.downloadedAt,
-        );
+        providerId: 'download',
-      } else {
+      );
-        downloadItems.add(
+
-          RecentAccessItem(
+      downloadIds.add(recentId);
-            id: '${mostRecent.albumName}|$artistForKey',
+      downloadFilePathByRecentKey['${recent.type.name}:${recent.id}'] =
-            name: mostRecent.albumName,
+          mostRecent.filePath;
-            subtitle: artistForKey,
+      if (!hiddenIds.contains(recentId)) {
-            imageUrl: mostRecent.coverUrl,
+        visibleDownloads.add(recent);
-            type: RecentAccessType.album,
-            accessedAt: mostRecent.downloadedAt,
-            providerId: 'download',
-          ),
-        );
       }
     }
 
-    downloadItems.sort((a, b) => b.accessedAt.compareTo(a.accessedAt));
+    visibleDownloads.sort((a, b) => b.accessedAt.compareTo(a.accessedAt));
-
+    if (visibleDownloads.length > 10) {
-    final visibleDownloads = <RecentAccessItem>[];
+      visibleDownloads.removeRange(10, visibleDownloads.length);
-    for (final item in downloadItems) {
-      if (!hiddenIds.contains(item.id)) {
-        visibleDownloads.add(item);
-        if (visibleDownloads.length >= 10) {
-          break;
-        }
-      }
     }
 
     final allItems = <RecentAccessItem>[...items, ...visibleDownloads];
@@ -1191,7 +1243,8 @@ class _HomeTabState extends ConsumerState<HomeTab>
 
     final view = _RecentAccessView(
       uniqueItems: uniqueItems,
-      downloadItems: downloadItems,
+      downloadIds: downloadIds,
+      downloadFilePathByRecentKey: downloadFilePathByRecentKey,
       hasHiddenDownloads: hiddenIds.isNotEmpty,
     );
 
@@ -1604,7 +1657,7 @@ class _HomeTabState extends ConsumerState<HomeTab>
 
   Widget _buildRecentAccess(_RecentAccessView view, ColorScheme colorScheme) {
     final uniqueItems = view.uniqueItems;
-    final downloadItems = view.downloadItems;
+    final downloadIds = view.downloadIds;
     final hasHiddenDownloads = view.hasHiddenDownloads;
 
     return Padding(
@@ -1624,10 +1677,10 @@ class _HomeTabState extends ConsumerState<HomeTab>
               if (uniqueItems.isNotEmpty)
                 TextButton(
                   onPressed: () {
-                    for (final item in downloadItems) {
+                    for (final id in downloadIds) {
                       ref
                           .read(recentAccessProvider.notifier)
-                          .hideDownloadFromRecents(item.id);
+                          .hideDownloadFromRecents(id);
                     }
                     ref.read(recentAccessProvider.notifier).clearHistory();
                   },
@@ -1680,7 +1733,11 @@ class _HomeTabState extends ConsumerState<HomeTab>
             )
           else
             ...uniqueItems.map(
-              (item) => _buildRecentAccessItem(item, colorScheme),
+              (item) => _buildRecentAccessItem(
+                item,
+                colorScheme,
+                view.downloadFilePathByRecentKey,
+              ),
             ),
         ],
       ),
@@ -1690,10 +1747,17 @@ class _HomeTabState extends ConsumerState<HomeTab>
   Widget _buildRecentAccessItem(
     RecentAccessItem item,
     ColorScheme colorScheme,
+    Map<String, String> downloadFilePathByRecentKey,
   ) {
     IconData typeIcon;
     String typeLabel;
     final isDownloaded = item.providerId == 'download';
+    final embeddedCoverPath = isDownloaded
+        ? DownloadedEmbeddedCoverResolver.resolve(
+            downloadFilePathByRecentKey['${item.type.name}:${item.id}'],
+            onChanged: _onEmbeddedCoverChanged,
+          )
+        : null;
 
     switch (item.type) {
       case RecentAccessType.artist:
@@ -1723,7 +1787,25 @@ class _HomeTabState extends ConsumerState<HomeTab>
                 borderRadius: BorderRadius.circular(
                   item.type == RecentAccessType.artist ? 28 : 4,
                 ),
-                child: item.imageUrl != null && item.imageUrl!.isNotEmpty
+                child: embeddedCoverPath != null
+                    ? Image.file(
+                        File(embeddedCoverPath),
+                        width: 56,
+                        height: 56,
+                        fit: BoxFit.cover,
+                        cacheWidth: 112,
+                        cacheHeight: 112,
+                        errorBuilder: (context, error, stackTrace) => Container(
+                          width: 56,
+                          height: 56,
+                          color: colorScheme.surfaceContainerHighest,
+                          child: Icon(
+                            typeIcon,
+                            color: colorScheme.onSurfaceVariant,
+                          ),
+                        ),
+                      )
+                    : item.imageUrl != null && item.imageUrl!.isNotEmpty
                     ? CachedNetworkImage(
                         imageUrl: item.imageUrl!,
                         width: 56,
@@ -1896,10 +1978,15 @@ class _HomeTabState extends ConsumerState<HomeTab>
     }
   }
 
-  void _navigateToMetadataScreen(DownloadHistoryItem item) {
+  Future<void> _navigateToMetadataScreen(DownloadHistoryItem item) async {
+    final navigator = Navigator.of(context);
     _precacheCover(item.coverUrl);
-    Navigator.push(
+    final beforeModTime =
-      context,
+        await DownloadedEmbeddedCoverResolver.readFileModTimeMillis(
+          item.filePath,
+        );
+    if (!mounted) return;
+    final result = await navigator.push(
       PageRouteBuilder(
         transitionDuration: const Duration(milliseconds: 300),
         reverseTransitionDuration: const Duration(milliseconds: 250),
@@ -1909,6 +1996,12 @@ class _HomeTabState extends ConsumerState<HomeTab>
             FadeTransition(opacity: animation, child: child),
       ),
     );
+    await DownloadedEmbeddedCoverResolver.scheduleRefreshForPath(
+      item.filePath,
+      beforeModTime: beforeModTime,
+      force: result == true,
+      onChanged: _onEmbeddedCoverChanged,
+    );
   }
 
   void _precacheCover(String? url) {
@@ -1916,8 +2009,19 @@ class _HomeTabState extends ConsumerState<HomeTab>
     if (!url.startsWith('http://') && !url.startsWith('https://')) {
       return;
     }
+    final dpr = MediaQuery.devicePixelRatioOf(
+      context,
+    ).clamp(1.0, 3.0).toDouble();
+    final targetSize = (360 * dpr).round().clamp(512, 1024).toInt();
     precacheImage(
-      CachedNetworkImageProvider(url, cacheManager: CoverCacheManager.instance),
+      ResizeImage(
+        CachedNetworkImageProvider(
+          url,
+          cacheManager: CoverCacheManager.instance,
+        ),
+        width: targetSize,
+        height: targetSize,
+      ),
       context,
     );
   }

lib/screens/local_album_screen.dart

@@ -36,6 +36,7 @@ class _LocalAlbumScreenState extends ConsumerState<LocalAlbumScreen> {
   late Map<int, List<LocalLibraryItem>> _discGroupsCache;
   late List<int> _sortedDiscNumbersCache;
   late bool _hasMultipleDiscsCache;
+  String? _commonQualityCache;
 
   @override
   void initState() {
@@ -87,6 +88,7 @@ class _LocalAlbumScreenState extends ConsumerState<LocalAlbumScreen> {
     _discGroupsCache = _groupTracksByDisc(_sortedTracksCache);
     _sortedDiscNumbersCache = _discGroupsCache.keys.toList()..sort();
     _hasMultipleDiscsCache = _discGroupsCache.length > 1;
+    _commonQualityCache = _computeCommonQuality(_sortedTracksCache);
   }
 
   Map<int, List<LocalLibraryItem>> _groupTracksByDisc(
@@ -160,15 +162,16 @@ class _LocalAlbumScreenState extends ConsumerState<LocalAlbumScreen> {
     if (confirmed == true && mounted) {
       final libraryNotifier = ref.read(localLibraryProvider.notifier);
       final idsToDelete = _selectedIds.toList();
+      final tracksById = {for (final track in currentTracks) track.id: track};
 
       int deletedCount = 0;
       for (final id in idsToDelete) {
-        final item = currentTracks.where((e) => e.id == id).firstOrNull;
+        final item = tracksById[id];
         if (item != null) {
           try {
             await deleteFile(item.filePath);
           } catch (_) {}
-          libraryNotifier.removeItem(id);
+          await libraryNotifier.removeItem(id);
           deletedCount++;
         }
       }
@@ -425,6 +428,8 @@ class _LocalAlbumScreenState extends ConsumerState<LocalAlbumScreen> {
     ColorScheme colorScheme,
     List<LocalLibraryItem> tracks,
   ) {
+    final commonQuality = _commonQualityCache;
+
     return SliverToBoxAdapter(
       child: Padding(
         padding: const EdgeInsets.all(16),
@@ -519,22 +524,22 @@ class _LocalAlbumScreenState extends ConsumerState<LocalAlbumScreen> {
                     ),
                     const SizedBox(width: 8),
                     // Quality badge if all tracks have the same quality
-                    if (_getCommonQuality(tracks) != null)
+                    if (commonQuality != null)
                       Container(
                         padding: const EdgeInsets.symmetric(
                           horizontal: 12,
                           vertical: 6,
                         ),
                         decoration: BoxDecoration(
-                          color: _getCommonQuality(tracks)!.contains('24')
+                          color: commonQuality.contains('24')
                               ? colorScheme.primaryContainer
                               : colorScheme.surfaceContainerHighest,
                           borderRadius: BorderRadius.circular(20),
                         ),
                         child: Text(
-                          _getCommonQuality(tracks)!,
+                          commonQuality,
                           style: TextStyle(
-                            color: _getCommonQuality(tracks)!.contains('24')
+                            color: commonQuality.contains('24')
                                 ? colorScheme.onPrimaryContainer
                                 : colorScheme.onSurfaceVariant,
                             fontWeight: FontWeight.w600,
@@ -552,7 +557,7 @@ class _LocalAlbumScreenState extends ConsumerState<LocalAlbumScreen> {
     );
   }
 
-  String? _getCommonQuality(List<LocalLibraryItem> tracks) {
+  String? _computeCommonQuality(List<LocalLibraryItem> tracks) {
     if (tracks.isEmpty) return null;
     final first = tracks.first;
     if (first.bitDepth == null || first.sampleRate == null) return null;

lib/screens/playlist_screen.dart

@@ -181,6 +181,13 @@ class _PlaylistScreenState extends ConsumerState<PlaylistScreen> {
               (constraints.maxHeight - kToolbarHeight) /
               (expandedHeight - kToolbarHeight);
           final showContent = collapseRatio > 0.3;
+          final dpr = MediaQuery.devicePixelRatioOf(
+            context,
+          ).clamp(1.0, 3.0).toDouble();
+          final backgroundMemCacheWidth = (constraints.maxWidth * dpr)
+              .round()
+              .clamp(720, 1440)
+              .toInt();
 
           return FlexibleSpaceBar(
             collapseMode: CollapseMode.none,
@@ -192,6 +199,7 @@ class _PlaylistScreenState extends ConsumerState<PlaylistScreen> {
                   CachedNetworkImage(
                     imageUrl: widget.coverUrl!,
                     fit: BoxFit.cover,
+                    memCacheWidth: backgroundMemCacheWidth,
                     cacheManager: CoverCacheManager.instance,
                     placeholder: (_, _) =>
                         Container(color: colorScheme.surface),

lib/screens/queue_tab.dart

@@ -14,6 +14,7 @@ import 'package:spotiflac_android/providers/download_queue_provider.dart';
 import 'package:spotiflac_android/providers/settings_provider.dart';
 import 'package:spotiflac_android/providers/local_library_provider.dart';
 import 'package:spotiflac_android/services/library_database.dart';
+import 'package:spotiflac_android/services/downloaded_embedded_cover_resolver.dart';
 import 'package:spotiflac_android/screens/track_metadata_screen.dart';
 import 'package:spotiflac_android/screens/downloaded_album_screen.dart';
 import 'package:spotiflac_android/screens/local_album_screen.dart';
@@ -105,6 +106,7 @@ class _GroupedAlbum {
   final String albumName;
   final String artistName;
   final String? coverUrl;
+  final String sampleFilePath;
   final List<DownloadHistoryItem> tracks;
   final DateTime latestDownload;
   final String searchKey;
@@ -113,6 +115,7 @@ class _GroupedAlbum {
     required this.albumName,
     required this.artistName,
     this.coverUrl,
+    required this.sampleFilePath,
     required this.tracks,
     required this.latestDownload,
   }) : searchKey = '${albumName.toLowerCase()}|${artistName.toLowerCase()}';
@@ -207,10 +210,25 @@ class _UnifiedCacheEntry {
   });
 }
 
+class _QueueItemIdsSnapshot {
+  final List<String> ids;
+
+  const _QueueItemIdsSnapshot(this.ids);
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is _QueueItemIdsSnapshot && listEquals(ids, other.ids);
+
+  @override
+  int get hashCode => Object.hashAll(ids);
+}
+
 Map<String, List<String>> _filterHistoryInIsolate(Map<String, Object> payload) {
   final entries = (payload['entries'] as List).cast<List>();
   final albumCounts = (payload['albumCounts'] as Map).cast<String, int>();
   final query = (payload['query'] as String?) ?? '';
+  final hasQuery = query.isNotEmpty;
 
   final allIds = <String>[];
   final albumIds = <String>[];
@@ -219,10 +237,11 @@ Map<String, List<String>> _filterHistoryInIsolate(Map<String, Object> payload) {
   for (final entry in entries) {
     final id = entry[0] as String;
     final albumKey = entry[1] as String;
-    final searchKey = entry[2] as String;
+    if (hasQuery) {
-
+      final searchKey = entry[2] as String;
-    if (query.isNotEmpty && !searchKey.contains(query)) {
+      if (!searchKey.contains(query)) {
-      continue;
+        continue;
+      }
     }
 
     allIds.add(id);
@@ -259,6 +278,8 @@ class _QueueTabState extends ConsumerState<QueueTab> {
   final ValueNotifier<bool> _alwaysMissingFileNotifier = ValueNotifier(false);
   final Set<String> _pendingChecks = {};
   static const int _maxCacheSize = 500;
+  static const int _maxSearchIndexCacheSize = 4000;
+  bool _embeddedCoverRefreshScheduled = false;
 
   bool _isSelectionMode = false;
   final Set<String> _selectedIds = {};
@@ -290,8 +311,6 @@ class _QueueTabState extends ConsumerState<QueueTab> {
   _HistoryStats? _historyStatsCache;
   final Map<String, String> _searchIndexCache = {};
   final Map<String, String> _localSearchIndexCache = {};
-  Map<String, DownloadHistoryItem> _historyItemsById = {};
-  List<List<String>> _historyFilterEntries = const [];
   Map<String, List<DownloadHistoryItem>> _filteredHistoryCache = const {};
   List<DownloadHistoryItem>? _filterItemsCache;
   String _filterQueryCache = '';
@@ -379,32 +398,24 @@ class _QueueTabState extends ConsumerState<QueueTab> {
     _historyItemsCache = items;
     _localLibraryItemsCache = localItems;
     _historyStatsCache = _buildHistoryStats(items, localItems);
-    _searchIndexCache
+    if (historyChanged) {
-      ..clear()
+      _searchIndexCache.clear();
-      ..addEntries(
+    }
-        items.map((item) => MapEntry(item.id, _buildSearchKey(item))),
-      );
     if (localChanged) {
-      _localSearchIndexCache
+      _localSearchIndexCache.clear();
-        ..clear()
-        ..addEntries(
-          localItems.map(
-            (item) => MapEntry(item.id, _buildLocalSearchKey(item)),
-          ),
-        );
       _localFilterItemsCache = null;
       _localFilterQueryCache = '';
       _filteredLocalItemsCache = const [];
     }
     _unifiedItemsCache.clear();
-    _historyItemsById = {for (final item in items) item.id: item};
+
-    _historyFilterEntries = List<List<String>>.generate(items.length, (index) {
+    if (historyChanged) {
-      final item = items[index];
+      final validPaths = items
-      final searchKey = _searchIndexCache[item.id] ?? _buildSearchKey(item);
+          .map((item) => _cleanFilePath(item.filePath))
-      final albumKey =
+          .where((path) => path.isNotEmpty)
-          '${item.albumName.toLowerCase()}|${(item.albumArtist ?? item.artistName).toLowerCase()}';
+          .toSet();
-      return [item.id, albumKey, searchKey];
+      DownloadedEmbeddedCoverResolver.invalidatePathsNotIn(validPaths);
-    }, growable: false);
+    }
     _requestFilterRefresh();
   }
 
@@ -418,6 +429,30 @@ class _QueueTabState extends ConsumerState<QueueTab> {
         .toLowerCase();
   }
 
+  String _historySearchKeyForItem(DownloadHistoryItem item) {
+    final cached = _searchIndexCache[item.id];
+    if (cached != null) return cached;
+
+    final searchKey = _buildSearchKey(item);
+    _searchIndexCache[item.id] = searchKey;
+    while (_searchIndexCache.length > _maxSearchIndexCacheSize) {
+      _searchIndexCache.remove(_searchIndexCache.keys.first);
+    }
+    return searchKey;
+  }
+
+  String _localSearchKeyForItem(LocalLibraryItem item) {
+    final cached = _localSearchIndexCache[item.id];
+    if (cached != null) return cached;
+
+    final searchKey = _buildLocalSearchKey(item);
+    _localSearchIndexCache[item.id] = searchKey;
+    while (_localSearchIndexCache.length > _maxSearchIndexCacheSize) {
+      _localSearchIndexCache.remove(_localSearchIndexCache.keys.first);
+    }
+    return searchKey;
+  }
+
   List<LocalLibraryItem> _filterLocalItems(
     List<LocalLibraryItem> items,
     String query,
@@ -430,11 +465,7 @@ class _QueueTabState extends ConsumerState<QueueTab> {
 
     final filtered = items
         .where((item) {
-          final searchKey =
+          final searchKey = _localSearchKeyForItem(item);
-              _localSearchIndexCache[item.id] ?? _buildLocalSearchKey(item);
-          if (!_localSearchIndexCache.containsKey(item.id)) {
-            _localSearchIndexCache[item.id] = searchKey;
-          }
           return searchKey.contains(query);
         })
         .toList(growable: false);
@@ -507,15 +538,26 @@ class _QueueTabState extends ConsumerState<QueueTab> {
     }
 
     final requestId = ++_filterRequestId;
+    final includeSearchKey = query.isNotEmpty;
+    final entries = List<List<String>>.generate(items.length, (index) {
+      final item = items[index];
+      final albumKey =
+          '${item.albumName.toLowerCase()}|${(item.albumArtist ?? item.artistName).toLowerCase()}';
+      if (!includeSearchKey) {
+        return [item.id, albumKey];
+      }
+      final searchKey = _historySearchKeyForItem(item);
+      return [item.id, albumKey, searchKey];
+    }, growable: false);
     final payload = <String, Object>{
-      'entries': _historyFilterEntries,
+      'entries': entries,
       'albumCounts': albumCounts,
       'query': query,
     };
 
     compute(_filterHistoryInIsolate, payload).then((result) {
       if (!mounted || requestId != _filterRequestId) return;
-      final itemsById = _historyItemsById;
+      final itemsById = {for (final item in items) item.id: item};
       final filtered = <String, List<DownloadHistoryItem>>{};
       for (final entry in result.entries) {
         filtered[entry.key] = entry.value
@@ -563,10 +605,7 @@ class _QueueTabState extends ConsumerState<QueueTab> {
     final query = searchQuery;
     return items
         .where((item) {
-          final searchKey = _searchIndexCache[item.id] ?? _buildSearchKey(item);
+          final searchKey = _historySearchKeyForItem(item);
-          if (!_searchIndexCache.containsKey(item.id)) {
-            _searchIndexCache[item.id] = searchKey;
-          }
           return searchKey.contains(query);
         })
         .toList(growable: false);
@@ -646,13 +685,26 @@ class _QueueTabState extends ConsumerState<QueueTab> {
   }
 
   String _getQualityBadgeText(String quality) {
-    if (quality.contains('bit')) {
+    final q = quality.trim().toLowerCase();
+    if (q.contains('bit')) {
       return quality.split('/').first;
     }
-    final bitrateMatch = RegExp(r'(\d+)kbps').firstMatch(quality);
+
-    if (bitrateMatch != null) {
+    // Supports "MP3 320k", "Opus 256kbps", etc.
-      return '${bitrateMatch.group(1)}k';
+    final bitrateTextMatch = RegExp(
+      r'(\d+)\s*k(?:bps)?',
+      caseSensitive: false,
+    ).firstMatch(quality);
+    if (bitrateTextMatch != null) {
+      return '${bitrateTextMatch.group(1)}k';
     }
+
+    // Supports legacy quality IDs like "opus_256" / "mp3_320".
+    final bitrateIdMatch = RegExp(r'_(\d+)$').firstMatch(q);
+    if (bitrateIdMatch != null) {
+      return '${bitrateIdMatch.group(1)}k';
+    }
+
     return quality.split(' ').first;
   }
 
@@ -682,10 +734,11 @@ class _QueueTabState extends ConsumerState<QueueTab> {
     if (confirmed == true && mounted) {
       final historyNotifier = ref.read(downloadHistoryProvider.notifier);
       final localLibraryDb = LibraryDatabase.instance;
+      final itemsById = {for (final item in allItems) item.id: item};
 
       int deletedCount = 0;
       for (final id in _selectedIds) {
-        final item = allItems.where((e) => e.id == id).firstOrNull;
+        final item = itemsById[id];
         if (item != null) {
           try {
             final cleanPath = _cleanFilePath(item.filePath);
@@ -725,11 +778,42 @@ class _QueueTabState extends ConsumerState<QueueTab> {
 
   /// Strip EXISTS: prefix from file path (legacy history items)
   String _cleanFilePath(String? filePath) {
-    if (filePath == null) return '';
+    return DownloadedEmbeddedCoverResolver.cleanFilePath(filePath);
-    if (filePath.startsWith('EXISTS:')) {
+  }
-      return filePath.substring(7);
+
-    }
+  Future<int?> _readFileModTimeMillis(String? filePath) async {
-    return filePath;
+    return DownloadedEmbeddedCoverResolver.readFileModTimeMillis(filePath);
+  }
+
+  void _onEmbeddedCoverChanged() {
+    if (!mounted || _embeddedCoverRefreshScheduled) return;
+    _embeddedCoverRefreshScheduled = true;
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      _embeddedCoverRefreshScheduled = false;
+      if (mounted) {
+        setState(() {});
+      }
+    });
+  }
+
+  Future<void> _scheduleDownloadedEmbeddedCoverRefreshForPath(
+    String? filePath, {
+    int? beforeModTime,
+    bool force = false,
+  }) async {
+    await DownloadedEmbeddedCoverResolver.scheduleRefreshForPath(
+      filePath,
+      beforeModTime: beforeModTime,
+      force: force,
+      onChanged: _onEmbeddedCoverChanged,
+    );
+  }
+
+  String? _resolveDownloadedEmbeddedCoverPath(String? filePath) {
+    return DownloadedEmbeddedCoverResolver.resolve(
+      filePath,
+      onChanged: _onEmbeddedCoverChanged,
+    );
   }
 
   ValueListenable<bool> _fileExistsListenable(String? filePath) {
@@ -804,6 +888,21 @@ class _QueueTabState extends ConsumerState<QueueTab> {
     });
   }
 
+  String _fileExtLower(String filePath) {
+    final dotIndex = filePath.lastIndexOf('.');
+    if (dotIndex < 0 || dotIndex == filePath.length - 1) {
+      return '';
+    }
+    return filePath.substring(dotIndex + 1).toLowerCase();
+  }
+
+  String? _localQualityLabel(LocalLibraryItem item) {
+    if (item.bitDepth == null || item.sampleRate == null) {
+      return null;
+    }
+    return '${item.bitDepth}bit/${(item.sampleRate! / 1000).toStringAsFixed(1)}kHz';
+  }
+
   List<UnifiedLibraryItem> _applyAdvancedFilters(
     List<UnifiedLibraryItem> items,
   ) {
@@ -841,7 +940,7 @@ class _QueueTabState extends ConsumerState<QueueTab> {
             }
 
             if (_filterFormat != null) {
-              final ext = item.filePath.split('.').last.toLowerCase();
+              final ext = _fileExtLower(item.filePath);
               if (ext != _filterFormat) return false;
             }
 
@@ -897,7 +996,7 @@ class _QueueTabState extends ConsumerState<QueueTab> {
   /// Check if a file path passes the current format filter
   bool _passesFormatFilter(String filePath) {
     if (_filterFormat == null) return true;
-    return filePath.split('.').last.toLowerCase() == _filterFormat;
+    return _fileExtLower(filePath) == _filterFormat;
   }
 
   /// Filter grouped download albums by search query + advanced filters
@@ -922,15 +1021,15 @@ class _QueueTabState extends ConsumerState<QueueTab> {
 
       // Filter tracks within the album by advanced filters
       if (_filterQuality != null || _filterFormat != null) {
-        final filteredTracks = album.tracks
+        var hasMatchingTrack = false;
-            .where((track) {
+        for (final track in album.tracks) {
-              if (!_passesQualityFilter(track.quality)) return false;
+          if (!_passesQualityFilter(track.quality)) continue;
-              if (!_passesFormatFilter(track.filePath)) return false;
+          if (!_passesFormatFilter(track.filePath)) continue;
-              return true;
+          hasMatchingTrack = true;
-            })
+          break;
-            .toList(growable: false);
+        }
 
-        if (filteredTracks.isEmpty) continue;
+        if (!hasMatchingTrack) continue;
       }
 
       result.add(album);
@@ -979,20 +1078,15 @@ class _QueueTabState extends ConsumerState<QueueTab> {
 
       // Filter tracks within the album by advanced filters
       if (_filterQuality != null || _filterFormat != null) {
-        final filteredTracks = album.tracks
+        var hasMatchingTrack = false;
-            .where((track) {
+        for (final track in album.tracks) {
-              String? quality;
+          if (!_passesQualityFilter(_localQualityLabel(track))) continue;
-              if (track.bitDepth != null && track.sampleRate != null) {
+          if (!_passesFormatFilter(track.filePath)) continue;
-                quality =
+          hasMatchingTrack = true;
-                    '${track.bitDepth}bit/${(track.sampleRate! / 1000).toStringAsFixed(1)}kHz';
+          break;
-              }
+        }
-              if (!_passesQualityFilter(quality)) return false;
-              if (!_passesFormatFilter(track.filePath)) return false;
-              return true;
-            })
-            .toList(growable: false);
 
-        if (filteredTracks.isEmpty) continue;
+        if (!hasMatchingTrack) continue;
       }
 
       result.add(album);
@@ -1022,7 +1116,7 @@ class _QueueTabState extends ConsumerState<QueueTab> {
   Set<String> _getAvailableFormats(List<UnifiedLibraryItem> items) {
     final formats = <String>{};
     for (final item in items) {
-      final ext = item.filePath.split('.').last.toLowerCase();
+      final ext = _fileExtLower(item.filePath);
       if (['flac', 'mp3', 'm4a', 'opus', 'ogg', 'wav', 'aiff'].contains(ext)) {
         formats.add(ext);
       }
@@ -1274,13 +1368,24 @@ class _QueueTabState extends ConsumerState<QueueTab> {
     if (!url.startsWith('http://') && !url.startsWith('https://')) {
       return;
     }
+    final dpr = MediaQuery.devicePixelRatioOf(
+      context,
+    ).clamp(1.0, 3.0).toDouble();
+    final targetSize = (360 * dpr).round().clamp(512, 1024).toInt();
     precacheImage(
-      CachedNetworkImageProvider(url, cacheManager: CoverCacheManager.instance),
+      ResizeImage(
+        CachedNetworkImageProvider(
+          url,
+          cacheManager: CoverCacheManager.instance,
+        ),
+        width: targetSize,
+        height: targetSize,
+      ),
       context,
     );
   }
 
-  void _navigateToMetadataScreen(DownloadItem item) {
+  Future<void> _navigateToMetadataScreen(DownloadItem item) async {
     final historyItem = ref
         .read(downloadHistoryProvider)
         .items
@@ -1298,10 +1403,12 @@ class _QueueTabState extends ConsumerState<QueueTab> {
           ),
         );
 
+    final navigator = Navigator.of(context);
     _precacheCover(historyItem.coverUrl);
     _searchFocusNode.unfocus();
-    Navigator.push(
+    final beforeModTime = await _readFileModTimeMillis(historyItem.filePath);
-      context,
+    if (!mounted) return;
+    final result = await navigator.push(
       PageRouteBuilder(
         transitionDuration: const Duration(milliseconds: 300),
         reverseTransitionDuration: const Duration(milliseconds: 250),
@@ -1310,14 +1417,31 @@ class _QueueTabState extends ConsumerState<QueueTab> {
         transitionsBuilder: (context, animation, secondaryAnimation, child) =>
             FadeTransition(opacity: animation, child: child),
       ),
-    ).then((_) => _searchFocusNode.unfocus());
+    );
+    _searchFocusNode.unfocus();
+    if (result == true) {
+      await _scheduleDownloadedEmbeddedCoverRefreshForPath(
+        historyItem.filePath,
+        beforeModTime: beforeModTime,
+        force: true,
+      );
+      return;
+    }
+    await _scheduleDownloadedEmbeddedCoverRefreshForPath(
+      historyItem.filePath,
+      beforeModTime: beforeModTime,
+    );
   }
 
-  void _navigateToHistoryMetadataScreen(DownloadHistoryItem item) {
+  Future<void> _navigateToHistoryMetadataScreen(
+    DownloadHistoryItem item,
+  ) async {
+    final navigator = Navigator.of(context);
     _precacheCover(item.coverUrl);
     _searchFocusNode.unfocus();
-    Navigator.push(
+    final beforeModTime = await _readFileModTimeMillis(item.filePath);
-      context,
+    if (!mounted) return;
+    final result = await navigator.push(
       PageRouteBuilder(
         transitionDuration: const Duration(milliseconds: 300),
         reverseTransitionDuration: const Duration(milliseconds: 250),
@@ -1326,7 +1450,20 @@ class _QueueTabState extends ConsumerState<QueueTab> {
         transitionsBuilder: (context, animation, secondaryAnimation, child) =>
             FadeTransition(opacity: animation, child: child),
       ),
-    ).then((_) => _searchFocusNode.unfocus());
+    );
+    _searchFocusNode.unfocus();
+    if (result == true) {
+      await _scheduleDownloadedEmbeddedCoverRefreshForPath(
+        item.filePath,
+        beforeModTime: beforeModTime,
+        force: true,
+      );
+      return;
+    }
+    await _scheduleDownloadedEmbeddedCoverRefreshForPath(
+      item.filePath,
+      beforeModTime: beforeModTime,
+    );
   }
 
   void _navigateToLocalMetadataScreen(LocalLibraryItem item) {
@@ -1355,10 +1492,7 @@ class _QueueTabState extends ConsumerState<QueueTab> {
     if (searchQuery.isNotEmpty) {
       final query = searchQuery;
       filteredItems = items.where((item) {
-        final searchKey = _searchIndexCache[item.id] ?? _buildSearchKey(item);
+        final searchKey = _historySearchKeyForItem(item);
-        if (!_searchIndexCache.containsKey(item.id)) {
-          _searchIndexCache[item.id] = searchKey;
-        }
         return searchKey.contains(query);
       }).toList();
     }
@@ -1421,6 +1555,7 @@ class _QueueTabState extends ConsumerState<QueueTab> {
           albumName: tracks.first.albumName,
           artistName: tracks.first.albumArtist ?? tracks.first.artistName,
           coverUrl: tracks.first.coverUrl,
+          sampleFilePath: tracks.first.filePath,
           tracks: tracks,
           latestDownload: tracks
               .map((t) => t.downloadedAt)
@@ -1544,7 +1679,7 @@ class _QueueTabState extends ConsumerState<QueueTab> {
     _initializePageController();
 
     final hasQueueItems = ref.watch(
-      downloadQueueProvider.select((s) => s.items.isNotEmpty),
+      downloadQueueLookupProvider.select((lookup) => lookup.itemIds.isNotEmpty),
     );
     final allHistoryItems = ref.watch(
       downloadHistoryProvider.select((s) => s.items),
@@ -1572,6 +1707,14 @@ class _QueueTabState extends ConsumerState<QueueTab> {
         _buildHistoryStats(allHistoryItems, localLibraryItems);
     final groupedAlbums = historyStats.groupedAlbums;
     final groupedLocalAlbums = historyStats.groupedLocalAlbums;
+    final filteredGroupedAlbums = _filterGroupedAlbums(
+      groupedAlbums,
+      _searchQuery,
+    );
+    final filteredGroupedLocalAlbums = _filterGroupedLocalAlbums(
+      groupedLocalAlbums,
+      _searchQuery,
+    );
     final albumCount = historyStats.totalAlbumCount;
     final singleCount = historyStats.totalSingleTracks;
     final filterDataCache = <String, _FilterContentData>{};
@@ -1582,8 +1725,8 @@ class _QueueTabState extends ConsumerState<QueueTab> {
         () => _computeFilterContentData(
           filterMode: filterMode,
           allHistoryItems: allHistoryItems,
-          groupedAlbums: groupedAlbums,
+          filteredGroupedAlbums: filteredGroupedAlbums,
-          groupedLocalAlbums: groupedLocalAlbums,
+          filteredGroupedLocalAlbums: filteredGroupedLocalAlbums,
           albumCounts: historyStats.albumCounts,
           localAlbumCounts: historyStats.localAlbumCounts,
           localLibraryItems: localLibraryItems,
@@ -1647,7 +1790,9 @@ class _QueueTabState extends ConsumerState<QueueTab> {
                 ),
 
                 // Search bar - always at top
-                if (allHistoryItems.isNotEmpty || hasQueueItems || localLibraryItems.isNotEmpty)
+                if (allHistoryItems.isNotEmpty ||
+                    hasQueueItems ||
+                    localLibraryItems.isNotEmpty)
                   SliverToBoxAdapter(
                     child: Padding(
                       padding: const EdgeInsets.fromLTRB(16, 8, 16, 0),
@@ -1972,8 +2117,8 @@ class _QueueTabState extends ConsumerState<QueueTab> {
   _FilterContentData _computeFilterContentData({
     required String filterMode,
     required List<DownloadHistoryItem> allHistoryItems,
-    required List<_GroupedAlbum> groupedAlbums,
+    required List<_GroupedAlbum> filteredGroupedAlbums,
-    required List<_GroupedLocalAlbum> groupedLocalAlbums,
+    required List<_GroupedLocalAlbum> filteredGroupedLocalAlbums,
     required Map<String, int> albumCounts,
     required Map<String, int> localAlbumCounts,
     required List<LocalLibraryItem> localLibraryItems,
@@ -1988,16 +2133,6 @@ class _QueueTabState extends ConsumerState<QueueTab> {
       filterMode: filterMode,
     );
 
-    final searchQuery = _searchQuery;
-    final filteredGroupedAlbums = _filterGroupedAlbums(
-      groupedAlbums,
-      searchQuery,
-    );
-    final filteredGroupedLocalAlbums = _filterGroupedLocalAlbums(
-      groupedLocalAlbums,
-      searchQuery,
-    );
-
     final unifiedItems = _getUnifiedItems(
       filterMode: filterMode,
       historyItems: historyItems,
@@ -2023,7 +2158,7 @@ class _QueueTabState extends ConsumerState<QueueTab> {
     return Consumer(
       builder: (context, ref, child) {
         final queueCount = ref.watch(
-          downloadQueueProvider.select((s) => s.items.length),
+          downloadQueueLookupProvider.select((lookup) => lookup.itemIds.length),
         );
         if (queueCount == 0) {
           return const SliverToBoxAdapter(child: SizedBox.shrink());
@@ -2054,20 +2189,24 @@ class _QueueTabState extends ConsumerState<QueueTab> {
   Widget _buildQueueItemsSliver(BuildContext context, ColorScheme colorScheme) {
     return Consumer(
       builder: (context, ref, child) {
-        final queueItems = ref.watch(
+        final queueIdsSnapshot = ref.watch(
-          downloadQueueProvider.select((s) => s.items),
+          downloadQueueLookupProvider.select(
+            (lookup) => _QueueItemIdsSnapshot(lookup.itemIds),
+          ),
         );
-        if (queueItems.isEmpty) {
+        if (queueIdsSnapshot.ids.isEmpty) {
           return const SliverToBoxAdapter(child: SizedBox.shrink());
         }
         return SliverList(
           delegate: SliverChildBuilderDelegate((context, index) {
-            final item = queueItems[index];
+            final itemId = queueIdsSnapshot.ids[index];
-            return KeyedSubtree(
+            return _QueueItemSliverRow(
-              key: ValueKey(item.id),
+              key: ValueKey(itemId),
-              child: _buildQueueItem(context, item, colorScheme),
+              itemId: itemId,
+              colorScheme: colorScheme,
+              itemBuilder: _buildQueueItem,
             );
-          }, childCount: queueItems.length),
+          }, childCount: queueIdsSnapshot.ids.length),
         );
       },
     );
@@ -2093,7 +2232,7 @@ class _QueueTabState extends ConsumerState<QueueTab> {
 
     return CustomScrollView(
       slivers: [
-        if (totalTrackCount > 0 && !hasQueueItems && filterMode == 'all')
+        if (totalTrackCount > 0 && filterMode == 'all')
           SliverToBoxAdapter(
             child: Padding(
               padding: const EdgeInsets.fromLTRB(16, 8, 16, 8),
@@ -2143,7 +2282,6 @@ class _QueueTabState extends ConsumerState<QueueTab> {
 
         if ((filteredGroupedAlbums.isNotEmpty ||
                 filteredGroupedLocalAlbums.isNotEmpty) &&
-            !hasQueueItems &&
             filterMode == 'albums')
           SliverToBoxAdapter(
             child: Padding(
@@ -2180,7 +2318,6 @@ class _QueueTabState extends ConsumerState<QueueTab> {
         // Albums empty state with filter button
         if (filteredGroupedAlbums.isEmpty &&
             filteredGroupedLocalAlbums.isEmpty &&
-            !hasQueueItems &&
             filterMode == 'albums' &&
             (historyItems.isNotEmpty || localLibraryItems.isNotEmpty))
           SliverToBoxAdapter(
@@ -2331,7 +2468,7 @@ class _QueueTabState extends ConsumerState<QueueTab> {
                 ),
 
         // Singles filter - show unified items (downloaded + local singles)
-        if (filterMode == 'singles' && !hasQueueItems)
+        if (filterMode == 'singles')
           SliverToBoxAdapter(
             child: Padding(
               padding: const EdgeInsets.fromLTRB(16, 8, 16, 8),
@@ -2559,6 +2696,9 @@ class _QueueTabState extends ConsumerState<QueueTab> {
     _GroupedAlbum album,
     ColorScheme colorScheme,
   ) {
+    final embeddedCoverPath = _resolveDownloadedEmbeddedCoverPath(
+      album.sampleFilePath,
+    );
     return GestureDetector(
       onTap: () => _navigateToDownloadedAlbum(album),
       child: Column(
@@ -2569,7 +2709,27 @@ class _QueueTabState extends ConsumerState<QueueTab> {
               children: [
                 ClipRRect(
                   borderRadius: BorderRadius.circular(12),
-                  child: album.coverUrl != null
+                  child: embeddedCoverPath != null
+                      ? Image.file(
+                          File(embeddedCoverPath),
+                          fit: BoxFit.cover,
+                          width: double.infinity,
+                          height: double.infinity,
+                          cacheWidth: 300,
+                          cacheHeight: 300,
+                          errorBuilder: (context, error, stackTrace) =>
+                              Container(
+                                color: colorScheme.surfaceContainerHighest,
+                                child: Center(
+                                  child: Icon(
+                                    Icons.album,
+                                    color: colorScheme.onSurfaceVariant,
+                                    size: 48,
+                                  ),
+                                ),
+                              ),
+                        )
+                      : album.coverUrl != null
                       ? CachedNetworkImage(
                           imageUrl: album.coverUrl!,
                           fit: BoxFit.cover,
@@ -2946,13 +3106,13 @@ class _QueueTabState extends ConsumerState<QueueTab> {
                             // show bytes downloaded instead of percentage
                             item.progress > 0
                                 ? (item.speedMBps > 0
-                                    ? '${(item.progress * 100).toStringAsFixed(0)}% • ${item.speedMBps.toStringAsFixed(1)} MB/s'
+                                      ? '${(item.progress * 100).toStringAsFixed(0)}% • ${item.speedMBps.toStringAsFixed(1)} MB/s'
-                                    : '${(item.progress * 100).toStringAsFixed(0)}%')
+                                      : '${(item.progress * 100).toStringAsFixed(0)}%')
                                 : (item.bytesReceived > 0
-                                    ? '${(item.bytesReceived / (1024 * 1024)).toStringAsFixed(1)} MB • ${item.speedMBps.toStringAsFixed(1)} MB/s'
+                                      ? '${(item.bytesReceived / (1024 * 1024)).toStringAsFixed(1)} MB • ${item.speedMBps.toStringAsFixed(1)} MB/s'
-                                    : (item.speedMBps > 0
+                                      : (item.speedMBps > 0
-                                        ? 'Downloading • ${item.speedMBps.toStringAsFixed(1)} MB/s'
+                                            ? 'Downloading • ${item.speedMBps.toStringAsFixed(1)} MB/s'
-                                        : 'Starting...')),
+                                            : 'Starting...')),
                             style: Theme.of(context).textTheme.labelSmall
                                 ?.copyWith(
                                   color: colorScheme.primary,
@@ -3139,6 +3299,26 @@ class _QueueTabState extends ConsumerState<QueueTab> {
     double size,
   ) {
     final isDownloaded = item.source == LibraryItemSource.downloaded;
+    if (isDownloaded) {
+      final embeddedCoverPath = _resolveDownloadedEmbeddedCoverPath(
+        item.filePath,
+      );
+      if (embeddedCoverPath != null) {
+        return ClipRRect(
+          borderRadius: BorderRadius.circular(8),
+          child: Image.file(
+            File(embeddedCoverPath),
+            width: size,
+            height: size,
+            fit: BoxFit.cover,
+            cacheWidth: (size * 2).toInt(),
+            cacheHeight: (size * 2).toInt(),
+            errorBuilder: (context, error, stackTrace) =>
+                _buildPlaceholderCover(colorScheme, size, isDownloaded),
+          ),
+        );
+      }
+    }
 
     // Network URL cover (downloaded items)
     if (item.coverUrl != null) {
@@ -3220,6 +3400,30 @@ class _QueueTabState extends ConsumerState<QueueTab> {
     ColorScheme colorScheme,
   ) {
     final isDownloaded = item.source == LibraryItemSource.downloaded;
+    if (isDownloaded) {
+      final embeddedCoverPath = _resolveDownloadedEmbeddedCoverPath(
+        item.filePath,
+      );
+      if (embeddedCoverPath != null) {
+        return ClipRRect(
+          borderRadius: BorderRadius.circular(8),
+          child: Image.file(
+            File(embeddedCoverPath),
+            fit: BoxFit.cover,
+            cacheWidth: 200,
+            cacheHeight: 200,
+            errorBuilder: (context, error, stackTrace) => Container(
+              color: colorScheme.surfaceContainerHighest,
+              child: Icon(
+                Icons.music_note,
+                color: colorScheme.onSurfaceVariant,
+                size: 32,
+              ),
+            ),
+          ),
+        );
+      }
+    }
 
     // Network URL cover (downloaded items)
     if (item.coverUrl != null) {
@@ -3668,6 +3872,31 @@ class _QueueTabState extends ConsumerState<QueueTab> {
   }
 }
 
+class _QueueItemSliverRow extends ConsumerWidget {
+  final String itemId;
+  final ColorScheme colorScheme;
+  final Widget Function(BuildContext, DownloadItem, ColorScheme) itemBuilder;
+
+  const _QueueItemSliverRow({
+    super.key,
+    required this.itemId,
+    required this.colorScheme,
+    required this.itemBuilder,
+  });
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final item = ref.watch(
+      downloadQueueLookupProvider.select((lookup) => lookup.byItemId[itemId]),
+    );
+    if (item == null) {
+      return const SizedBox.shrink();
+    }
+
+    return RepaintBoundary(child: itemBuilder(context, item, colorScheme));
+  }
+}
+
 class _FilterChip extends StatelessWidget {
   final String label;
   final int count;

lib/screens/search_screen.dart

@@ -26,7 +26,9 @@ class _SearchScreenState extends ConsumerState<SearchScreen> {
     if (widget.query.isNotEmpty) {
       WidgetsBinding.instance.addPostFrameCallback((_) {
         final settings = ref.read(settingsProvider);
-        ref.read(trackProvider.notifier).search(widget.query, metadataSource: settings.metadataSource);
+        ref
+            .read(trackProvider.notifier)
+            .search(widget.query, metadataSource: settings.metadataSource);
       });
     }
   }
@@ -41,19 +43,20 @@ class _SearchScreenState extends ConsumerState<SearchScreen> {
     final query = _searchController.text.trim();
     if (query.isNotEmpty) {
       final settings = ref.read(settingsProvider);
-      ref.read(trackProvider.notifier).search(query, metadataSource: settings.metadataSource);
+      ref
+          .read(trackProvider.notifier)
+          .search(query, metadataSource: settings.metadataSource);
     }
   }
 
   void _downloadTrack(Track track) {
     final settings = ref.read(settingsProvider);
-    ref.read(downloadQueueProvider.notifier).addToQueue(
+    ref
-      track,
+        .read(downloadQueueProvider.notifier)
-      settings.defaultService,
+        .addToQueue(track, settings.defaultService);
-    );
+    ScaffoldMessenger.of(
-    ScaffoldMessenger.of(context).showSnackBar(
+      context,
-      SnackBar(content: Text('Added "${track.name}" to queue')),
+    ).showSnackBar(SnackBar(content: Text('Added "${track.name}" to queue')));
-    );
   }
 
   @override
@@ -78,10 +81,7 @@ class _SearchScreenState extends ConsumerState<SearchScreen> {
           autofocus: widget.query.isEmpty,
         ),
         actions: [
-          IconButton(
+          IconButton(icon: const Icon(Icons.search), onPressed: _search),
-            icon: const Icon(Icons.search),
-            onPressed: _search,
-          ),
         ],
       ),
       body: Column(
@@ -92,7 +92,7 @@ class _SearchScreenState extends ConsumerState<SearchScreen> {
             Padding(
               padding: const EdgeInsets.all(16.0),
               child: Text(
-                trackState.error!, 
+                trackState.error!,
                 style: TextStyle(color: colorScheme.error),
               ),
             ),
@@ -115,11 +115,7 @@ class _SearchScreenState extends ConsumerState<SearchScreen> {
       child: Column(
         mainAxisAlignment: MainAxisAlignment.center,
         children: [
-          Icon(
+          Icon(Icons.search, size: 64, color: colorScheme.onSurfaceVariant),
-            Icons.search, 
-            size: 64, 
-            color: colorScheme.onSurfaceVariant,
-          ),
           const SizedBox(height: 16),
           Text(
             'Search for tracks',
@@ -137,11 +133,13 @@ class _SearchScreenState extends ConsumerState<SearchScreen> {
       leading: track.coverUrl != null
           ? ClipRRect(
               borderRadius: BorderRadius.circular(8),
-child: CachedNetworkImage(
+              child: CachedNetworkImage(
                 imageUrl: track.coverUrl!,
                 width: 48,
                 height: 48,
                 fit: BoxFit.cover,
+                memCacheWidth: 144,
+                memCacheHeight: 144,
                 cacheManager: CoverCacheManager.instance,
               ),
             )
@@ -152,15 +150,18 @@ child: CachedNetworkImage(
                 color: colorScheme.surfaceContainerHighest,
                 borderRadius: BorderRadius.circular(8),
               ),
-              child: Icon(Icons.music_note, color: colorScheme.onSurfaceVariant),
+              child: Icon(
+                Icons.music_note,
+                color: colorScheme.onSurfaceVariant,
+              ),
             ),
       title: Text(track.name, maxLines: 1, overflow: TextOverflow.ellipsis),
       subtitle: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
           Text(
-            track.artistName, 
+            track.artistName,
-            maxLines: 1, 
+            maxLines: 1,
             overflow: TextOverflow.ellipsis,
             style: TextStyle(color: colorScheme.onSurfaceVariant),
           ),

lib/screens/settings/about_page.dart

@@ -384,6 +384,8 @@ class _ContributorItem extends StatelessWidget {
                     width: 40,
                     height: 40,
                     fit: BoxFit.cover,
+                    memCacheWidth: 120,
+                    memCacheHeight: 120,
                     cacheManager: CoverCacheManager.instance,
                     placeholder: (context, url) => Container(
                       width: 40,

lib/screens/settings/cache_management_page.dart

@@ -60,19 +60,30 @@ class _CacheManagementPageState extends ConsumerState<CacheManagementPage> {
   }
 
   Future<_CacheOverview> _buildOverview() async {
-    final appCacheDir = await getApplicationCacheDirectory();
+    final appCacheDirFuture = getApplicationCacheDirectory();
-    final tempDir = await getTemporaryDirectory();
+    final tempDirFuture = getTemporaryDirectory();
+    final appSupportDirFuture = getApplicationSupportDirectory();
+    final coverStatsFuture = CoverCacheManager.getStats();
+    final prefsFuture = SharedPreferences.getInstance();
+    final trackCacheEntriesFuture = _getTrackCacheSizeSafe();
+
+    final appCacheDir = await appCacheDirFuture;
+    final tempDir = await tempDirFuture;
     final appCachePath = p.normalize(appCacheDir.path);
     final tempPath = p.normalize(tempDir.path);
     final tempIsSameAsAppCache = appCachePath == tempPath;
 
-    final appCacheStats = await _scanDirectory(Directory(appCachePath));
+    final appCacheStatsFuture = _scanDirectory(Directory(appCachePath));
-    final tempStats = tempIsSameAsAppCache
+    final tempStatsFuture = tempIsSameAsAppCache
-        ? null
+        ? Future<_DirectoryStats?>.value(null)
-        : await _scanDirectory(Directory(tempPath));
+        : _scanDirectory(Directory(tempPath));
-    final coverStats = await CoverCacheManager.getStats();
 
-    final prefs = await SharedPreferences.getInstance();
+    final appSupportDir = await appSupportDirFuture;
+    final libraryCoverStatsFuture = _scanDirectory(
+      Directory('${appSupportDir.path}/library_covers'),
+    );
+
+    final prefs = await prefsFuture;
     final explorePayload = prefs.getString(_exploreCacheKey);
     final exploreTs = prefs.getInt(_exploreCacheTsKey);
     var exploreBytes = 0;
@@ -84,16 +95,11 @@ class _CacheManagementPageState extends ConsumerState<CacheManagementPage> {
     }
     final hasExploreCache = exploreBytes > 0;
 
-    int trackCacheEntries;
+    final appCacheStats = await appCacheStatsFuture;
-    try {
+    final tempStats = await tempStatsFuture;
-      trackCacheEntries = await PlatformBridge.getTrackCacheSize();
+    final coverStats = await coverStatsFuture;
-    } catch (_) {
+    final libraryCoverStats = await libraryCoverStatsFuture;
-      trackCacheEntries = 0;
+    final trackCacheEntries = await trackCacheEntriesFuture;
-    }
-
-    final appSupportDir = await getApplicationSupportDirectory();
-    final libraryCoverDir = Directory('${appSupportDir.path}/library_covers');
-    final libraryCoverStats = await _scanDirectory(libraryCoverDir);
 
     return _CacheOverview(
       appCachePath: appCachePath,
@@ -132,16 +138,37 @@ class _CacheManagementPageState extends ConsumerState<CacheManagementPage> {
     return _DirectoryStats(fileCount: fileCount, totalSizeBytes: totalSize);
   }
 
+  Future<int> _getTrackCacheSizeSafe() async {
+    try {
+      return await PlatformBridge.getTrackCacheSize();
+    } catch (_) {
+      return 0;
+    }
+  }
+
   Future<void> _clearDirectoryContents(String path) async {
     final directory = Directory(path);
     if (!await directory.exists()) return;
 
     try {
-      final entities = directory.listSync(followLinks: false);
+      final entities = <FileSystemEntity>[];
-      for (final entity in entities) {
+      await for (final entity in directory.list(followLinks: false)) {
-        try {
+        entities.add(entity);
-          await entity.delete(recursive: true);
+      }
-        } catch (_) {}
+
+      const deleteChunkSize = 24;
+      for (var i = 0; i < entities.length; i += deleteChunkSize) {
+        final end = (i + deleteChunkSize < entities.length)
+            ? i + deleteChunkSize
+            : entities.length;
+        final chunk = entities.sublist(i, end);
+        await Future.wait(
+          chunk.map((entity) async {
+            try {
+              await entity.delete(recursive: true);
+            } catch (_) {}
+          }),
+        );
       }
     } catch (_) {}
 
@@ -583,7 +610,9 @@ class _CacheManagementPageState extends ConsumerState<CacheManagementPage> {
                     subtitle: _buildSubtitle(
                       context.l10n.cacheTrackLookupDesc,
                       overview.trackCacheEntries > 0
-                          ? context.l10n.cacheEntries(overview.trackCacheEntries)
+                          ? context.l10n.cacheEntries(
+                              overview.trackCacheEntries,
+                            )
                           : context.l10n.cacheNoData,
                     ),
                     trailing: _buildClearTrailing(
@@ -611,7 +640,8 @@ class _CacheManagementPageState extends ConsumerState<CacheManagementPage> {
                   SettingsItem(
                     icon: Icons.cleaning_services_outlined,
                     title: context.l10n.cacheCleanupUnused,
-                    subtitle: '${context.l10n.cacheCleanupUnusedDesc}\n${context.l10n.cacheCleanupUnusedSubtitle}',
+                    subtitle:
+                        '${context.l10n.cacheCleanupUnusedDesc}\n${context.l10n.cacheCleanupUnusedSubtitle}',
                     trailing: _buildClearTrailing(
                       'cleanup_unused',
                       _cleanupUnusedData,

lib/screens/settings/donate_page.dart

@@ -202,9 +202,11 @@ class _RecentDonorsCard extends StatelessWidget {
             const SizedBox(height: 16),
             _DonorTile(name: 'J', colorScheme: colorScheme),
             _DonorTile(name: 'Julian', colorScheme: colorScheme),
+            _DonorTile(name: 'matt_3050', colorScheme: colorScheme),
             _DonorTile(name: 'Daniel', colorScheme: colorScheme),
+            _DonorTile(name: '283Fabio', colorScheme: colorScheme),
             _DonorTile(
-              name: '283Fabio',
+              name: 'Elias el Autentico',
               colorScheme: colorScheme,
               showDivider: false,
             ),
@@ -255,21 +257,6 @@ class _DonateLinksCard extends StatelessWidget {
             endIndent: 16,
             color: colorScheme.outlineVariant.withValues(alpha: 0.3),
           ),
-          _DonateCardItem(
-            title: 'Buy Me a Coffee',
-            subtitle: 'buymeacoffee.com/zarzet',
-            customIcon: const BmacIcon(size: 22, color: Colors.black87),
-            color: const Color(0xFFFFDD00),
-            url: AppInfo.bmacUrl,
-            colorScheme: colorScheme,
-          ),
-          Divider(
-            height: 1,
-            thickness: 1,
-            indent: 74,
-            endIndent: 16,
-            color: colorScheme.outlineVariant.withValues(alpha: 0.3),
-          ),
           _DonateCardItem(
             title: 'GitHub Sponsors',
             subtitle: 'github.com/sponsors/zarzet',

lib/screens/settings/download_settings_page.dart

@@ -22,7 +22,7 @@ class DownloadSettingsPage extends ConsumerStatefulWidget {
 }
 
 class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
-  static const _builtInServices = ['tidal', 'qobuz'];
+  static const _builtInServices = ['tidal', 'qobuz', 'amazon'];
   int _androidSdkVersion = 0;
   bool _hasAllFilesAccess = false;
 
@@ -248,7 +248,7 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                           const SizedBox(width: 8),
                           Expanded(
                             child: Text(
-                              'Select Tidal or Qobuz above to configure quality',
+                              'Select Tidal, Qobuz, or Amazon above to configure quality',
                               style: Theme.of(context).textTheme.bodySmall
                                   ?.copyWith(
                                     color: colorScheme.onSurfaceVariant,
@@ -365,6 +365,18 @@ class _DownloadSettingsPageState extends ConsumerState<DownloadSettingsPage> {
                         .setUseAlbumArtistForFolders(value),
                     showDivider: false,
                     ),
+                  SettingsSwitchItem(
+                    icon: Icons.person_outline,
+                    title: context.l10n.downloadUsePrimaryArtistOnly,
+                    subtitle: settings.usePrimaryArtistOnly
+                        ? context.l10n.downloadUsePrimaryArtistOnlyEnabled
+                        : context.l10n.downloadUsePrimaryArtistOnlyDisabled,
+                    value: settings.usePrimaryArtistOnly,
+                    onChanged: (value) => ref
+                        .read(settingsProvider.notifier)
+                        .setUsePrimaryArtistOnly(value),
+                    showDivider: false,
+                    ),
                 ],
               ),
             ),
@@ -1354,6 +1366,7 @@ class _ServiceSelector extends ConsumerWidget {
     final isExtensionService = ![
       'tidal',
       'qobuz',
+      'amazon',
     ].contains(currentService);
     final isCurrentExtensionEnabled = isExtensionService
         ? extensionProviders.any((e) => e.id == currentService)
@@ -1380,6 +1393,13 @@ class _ServiceSelector extends ConsumerWidget {
                 isSelected: effectiveService == 'qobuz',
                 onTap: () => onChanged('qobuz'),
               ),
+              const SizedBox(width: 8),
+              _ServiceChip(
+                icon: Icons.shopping_bag_outlined,
+                label: 'Amazon',
+                isSelected: effectiveService == 'amazon',
+                onTap: () => onChanged('amazon'),
+              ),
             ],
           ),
           if (extensionProviders.isNotEmpty) ...[

lib/services/download_request_payload.dart

@@ -0,0 +1,154 @@
+class DownloadRequestPayload {
+  final String isrc;
+  final String service;
+  final String spotifyId;
+  final String trackName;
+  final String artistName;
+  final String albumName;
+  final String albumArtist;
+  final String coverUrl;
+  final String outputDir;
+  final String filenameFormat;
+  final String quality;
+  final bool embedLyrics;
+  final bool embedMaxQualityCover;
+  final int trackNumber;
+  final int discNumber;
+  final int totalTracks;
+  final String releaseDate;
+  final String itemId;
+  final int durationMs;
+  final String source;
+  final String genre;
+  final String label;
+  final String copyright;
+  final String tidalId;
+  final String qobuzId;
+  final String deezerId;
+  final String lyricsMode;
+  final bool useExtensions;
+  final bool useFallback;
+  final String storageMode;
+  final String safTreeUri;
+  final String safRelativeDir;
+  final String safFileName;
+  final String safOutputExt;
+
+  const DownloadRequestPayload({
+    this.isrc = '',
+    this.service = '',
+    this.spotifyId = '',
+    required this.trackName,
+    required this.artistName,
+    required this.albumName,
+    this.albumArtist = '',
+    this.coverUrl = '',
+    required this.outputDir,
+    required this.filenameFormat,
+    this.quality = 'LOSSLESS',
+    this.embedLyrics = true,
+    this.embedMaxQualityCover = true,
+    this.trackNumber = 1,
+    this.discNumber = 1,
+    this.totalTracks = 1,
+    this.releaseDate = '',
+    this.itemId = '',
+    this.durationMs = 0,
+    this.source = '',
+    this.genre = '',
+    this.label = '',
+    this.copyright = '',
+    this.tidalId = '',
+    this.qobuzId = '',
+    this.deezerId = '',
+    this.lyricsMode = 'embed',
+    this.useExtensions = false,
+    this.useFallback = false,
+    this.storageMode = 'app',
+    this.safTreeUri = '',
+    this.safRelativeDir = '',
+    this.safFileName = '',
+    this.safOutputExt = '',
+  });
+
+  Map<String, dynamic> toJson() {
+    return {
+      'isrc': isrc,
+      'service': service,
+      'spotify_id': spotifyId,
+      'track_name': trackName,
+      'artist_name': artistName,
+      'album_name': albumName,
+      'album_artist': albumArtist,
+      'cover_url': coverUrl,
+      'output_dir': outputDir,
+      'filename_format': filenameFormat,
+      'quality': quality,
+      'embed_lyrics': embedLyrics,
+      'embed_max_quality_cover': embedMaxQualityCover,
+      'track_number': trackNumber,
+      'disc_number': discNumber,
+      'total_tracks': totalTracks,
+      'release_date': releaseDate,
+      'item_id': itemId,
+      'duration_ms': durationMs,
+      'source': source,
+      'genre': genre,
+      'label': label,
+      'copyright': copyright,
+      'tidal_id': tidalId,
+      'qobuz_id': qobuzId,
+      'deezer_id': deezerId,
+      'lyrics_mode': lyricsMode,
+      'use_extensions': useExtensions,
+      'use_fallback': useFallback,
+      'storage_mode': storageMode,
+      'saf_tree_uri': safTreeUri,
+      'saf_relative_dir': safRelativeDir,
+      'saf_file_name': safFileName,
+      'saf_output_ext': safOutputExt,
+    };
+  }
+
+  DownloadRequestPayload withStrategy({
+    bool? useExtensions,
+    bool? useFallback,
+  }) {
+    return DownloadRequestPayload(
+      isrc: isrc,
+      service: service,
+      spotifyId: spotifyId,
+      trackName: trackName,
+      artistName: artistName,
+      albumName: albumName,
+      albumArtist: albumArtist,
+      coverUrl: coverUrl,
+      outputDir: outputDir,
+      filenameFormat: filenameFormat,
+      quality: quality,
+      embedLyrics: embedLyrics,
+      embedMaxQualityCover: embedMaxQualityCover,
+      trackNumber: trackNumber,
+      discNumber: discNumber,
+      totalTracks: totalTracks,
+      releaseDate: releaseDate,
+      itemId: itemId,
+      durationMs: durationMs,
+      source: source,
+      genre: genre,
+      label: label,
+      copyright: copyright,
+      tidalId: tidalId,
+      qobuzId: qobuzId,
+      deezerId: deezerId,
+      lyricsMode: lyricsMode,
+      useExtensions: useExtensions ?? this.useExtensions,
+      useFallback: useFallback ?? this.useFallback,
+      storageMode: storageMode,
+      safTreeUri: safTreeUri,
+      safRelativeDir: safRelativeDir,
+      safFileName: safFileName,
+      safOutputExt: safOutputExt,
+    );
+  }
+}

lib/services/downloaded_embedded_cover_resolver.dart

@@ -0,0 +1,220 @@
+import 'dart:collection';
+import 'dart:io';
+
+import 'package:flutter/widgets.dart';
+import 'package:spotiflac_android/services/platform_bridge.dart';
+import 'package:spotiflac_android/utils/file_access.dart';
+
+class _EmbeddedCoverCacheEntry {
+  final String previewPath;
+  final int? sourceModTimeMillis;
+
+  const _EmbeddedCoverCacheEntry({
+    required this.previewPath,
+    this.sourceModTimeMillis,
+  });
+}
+
+/// Shared resolver for embedded cover previews from downloaded/local files.
+/// It keeps a bounded in-memory cache and only refreshes extraction
+/// when the source file changed.
+class DownloadedEmbeddedCoverResolver {
+  static const int _maxCacheEntries = 180;
+
+  static final LinkedHashMap<String, _EmbeddedCoverCacheEntry> _cache =
+      LinkedHashMap<String, _EmbeddedCoverCacheEntry>();
+  static final Set<String> _pendingExtract = <String>{};
+  static final Set<String> _pendingRefresh = <String>{};
+  static final Set<String> _failedExtract = <String>{};
+
+  static String cleanFilePath(String? filePath) {
+    if (filePath == null) return '';
+    if (filePath.startsWith('EXISTS:')) {
+      return filePath.substring(7);
+    }
+    return filePath;
+  }
+
+  static Future<int?> readFileModTimeMillis(String? filePath) async {
+    final cleanPath = cleanFilePath(filePath);
+    if (cleanPath.isEmpty) return null;
+
+    if (isContentUri(cleanPath)) {
+      try {
+        final modTimes = await PlatformBridge.getSafFileModTimes([cleanPath]);
+        return modTimes[cleanPath];
+      } catch (_) {
+        return null;
+      }
+    }
+
+    try {
+      final stat = await File(cleanPath).stat();
+      return stat.modified.millisecondsSinceEpoch;
+    } catch (_) {
+      return null;
+    }
+  }
+
+  static String? resolve(String? filePath, {VoidCallback? onChanged}) {
+    final cleanPath = cleanFilePath(filePath);
+    if (cleanPath.isEmpty) return null;
+
+    if (_pendingRefresh.remove(cleanPath)) {
+      _ensureCover(cleanPath, forceRefresh: true, onChanged: onChanged);
+    }
+
+    final cached = _cache[cleanPath];
+    if (cached != null) {
+      if (File(cached.previewPath).existsSync()) {
+        _touch(cleanPath, cached);
+        return cached.previewPath;
+      }
+      _cache.remove(cleanPath);
+      _cleanupTempCoverPathSync(cached.previewPath);
+    }
+
+    return null;
+  }
+
+  static Future<void> scheduleRefreshForPath(
+    String? filePath, {
+    int? beforeModTime,
+    bool force = false,
+    VoidCallback? onChanged,
+  }) async {
+    final cleanPath = cleanFilePath(filePath);
+    if (cleanPath.isEmpty) return;
+
+    if (!force) {
+      if (beforeModTime == null) return;
+      final afterModTime = await readFileModTimeMillis(cleanPath);
+      if (afterModTime != null && afterModTime == beforeModTime) {
+        return;
+      }
+    }
+
+    _pendingRefresh.add(cleanPath);
+    _failedExtract.remove(cleanPath);
+    onChanged?.call();
+  }
+
+  static void invalidate(String? filePath) {
+    final cleanPath = cleanFilePath(filePath);
+    if (cleanPath.isEmpty) return;
+
+    final cached = _cache.remove(cleanPath);
+    _pendingExtract.remove(cleanPath);
+    _pendingRefresh.remove(cleanPath);
+    _failedExtract.remove(cleanPath);
+    if (cached != null) {
+      _cleanupTempCoverPathSync(cached.previewPath);
+    }
+  }
+
+  static void invalidatePathsNotIn(Set<String> validCleanPaths) {
+    if (validCleanPaths.isEmpty) {
+      final keys = _cache.keys.toList(growable: false);
+      for (final key in keys) {
+        invalidate(key);
+      }
+      return;
+    }
+
+    final staleKeys = _cache.keys
+        .where((path) => !validCleanPaths.contains(path))
+        .toList(growable: false);
+    for (final key in staleKeys) {
+      invalidate(key);
+    }
+  }
+
+  static void _touch(String cleanPath, _EmbeddedCoverCacheEntry entry) {
+    _cache
+      ..remove(cleanPath)
+      ..[cleanPath] = entry;
+  }
+
+  static void _trimCacheIfNeeded() {
+    while (_cache.length > _maxCacheEntries) {
+      final oldestKey = _cache.keys.first;
+      final removed = _cache.remove(oldestKey);
+      if (removed != null) {
+        _cleanupTempCoverPathSync(removed.previewPath);
+      }
+      _pendingExtract.remove(oldestKey);
+      _pendingRefresh.remove(oldestKey);
+      _failedExtract.remove(oldestKey);
+    }
+  }
+
+  static void _ensureCover(
+    String cleanPath, {
+    bool forceRefresh = false,
+    int? knownModTime,
+    VoidCallback? onChanged,
+  }) {
+    if (cleanPath.isEmpty) return;
+    if (_pendingExtract.contains(cleanPath)) return;
+    if (!forceRefresh && _cache.containsKey(cleanPath)) return;
+    if (!forceRefresh && _failedExtract.contains(cleanPath)) return;
+
+    _pendingExtract.add(cleanPath);
+    Future.microtask(() async {
+      String? outputPath;
+      try {
+        final modTime = knownModTime ?? await readFileModTimeMillis(cleanPath);
+        final tempDir = await Directory.systemTemp.createTemp(
+          'download_cover_preview_',
+        );
+        outputPath =
+            '${tempDir.path}${Platform.pathSeparator}cover_preview.jpg';
+        final result = await PlatformBridge.extractCoverToFile(
+          cleanPath,
+          outputPath,
+        );
+
+        final hasCover =
+            result['error'] == null && await File(outputPath).exists();
+        if (!hasCover) {
+          _failedExtract.add(cleanPath);
+          _cleanupTempCoverPathSync(outputPath);
+          return;
+        }
+
+        final previous = _cache[cleanPath];
+        final next = _EmbeddedCoverCacheEntry(
+          previewPath: outputPath,
+          sourceModTimeMillis: modTime,
+        );
+        _touch(cleanPath, next);
+        _failedExtract.remove(cleanPath);
+        _trimCacheIfNeeded();
+
+        if (previous != null && previous.previewPath != outputPath) {
+          _cleanupTempCoverPathSync(previous.previewPath);
+        }
+        onChanged?.call();
+      } catch (_) {
+        _failedExtract.add(cleanPath);
+        _cleanupTempCoverPathSync(outputPath);
+      } finally {
+        _pendingExtract.remove(cleanPath);
+      }
+    });
+  }
+
+  static void _cleanupTempCoverPathSync(String? coverPath) {
+    if (coverPath == null || coverPath.isEmpty) return;
+    try {
+      final file = File(coverPath);
+      if (file.existsSync()) {
+        file.deleteSync();
+      }
+      final parent = file.parent;
+      if (parent.existsSync()) {
+        parent.deleteSync(recursive: true);
+      }
+    } catch (_) {}
+  }
+}

lib/services/ffmpeg_service.dart

@@ -56,6 +56,48 @@ class FFmpegService {
     return '$tempDirPath${Platform.pathSeparator}temp_embed_${timestamp}_${processId}_$_tempEmbedCounter$normalizedExt';
   }
 
+  static List<String> _buildDecryptionKeyCandidates(String rawKey) {
+    final candidates = <String>[];
+
+    void addCandidate(String key) {
+      final normalized = key.trim();
+      if (normalized.isEmpty) return;
+      if (!candidates.contains(normalized)) {
+        candidates.add(normalized);
+      }
+    }
+
+    final trimmed = rawKey.trim();
+    if (trimmed.isEmpty) return candidates;
+
+    addCandidate(trimmed);
+
+    final noPrefix = trimmed.startsWith(RegExp(r'0x', caseSensitive: false))
+        ? trimmed.substring(2)
+        : trimmed;
+    addCandidate(noPrefix);
+
+    final compactHex = noPrefix.replaceAll(RegExp(r'[^0-9a-fA-F]'), '');
+    if (compactHex.isNotEmpty && compactHex.length.isEven) {
+      addCandidate(compactHex);
+    }
+
+    try {
+      final b64 = noPrefix.replaceAll(RegExp(r'\s+'), '');
+      final decoded = base64Decode(b64);
+      if (decoded.isNotEmpty) {
+        final hex = decoded
+            .map((b) => b.toRadixString(16).padLeft(2, '0'))
+            .join();
+        if (hex.isNotEmpty) {
+          addCandidate(hex);
+        }
+      }
+    } catch (_) {}
+
+    return candidates;
+  }
+
   static Future<FFmpegResult> _execute(String command) async {
     try {
       final session = await FFmpegKit.execute(command);
@@ -77,7 +119,7 @@ class FFmpegService {
     final outputPath = _buildOutputPath(inputPath, '.flac');
 
     final command =
-        '-i "$inputPath" -c:a flac -compression_level 8 "$outputPath" -y';
+        '-v error -xerror -i "$inputPath" -c:a flac -compression_level 8 "$outputPath" -y';
 
     final result = await _execute(command);
 
@@ -133,6 +175,111 @@ class FFmpegService {
     return null;
   }
 
+  static Future<String?> decryptAudioFile({
+    required String inputPath,
+    required String decryptionKey,
+    bool deleteOriginal = true,
+  }) async {
+    final trimmedKey = decryptionKey.trim();
+    if (trimmedKey.isEmpty) return inputPath;
+
+    // Amazon encrypted streams are commonly MP4 container with FLAC audio.
+    // Prefer FLAC output to avoid MP4 muxing errors during decrypt copy.
+    final preferredExt = inputPath.toLowerCase().endsWith('.m4a')
+        ? '.flac'
+        : inputPath.toLowerCase().endsWith('.flac')
+        ? '.flac'
+        : inputPath.toLowerCase().endsWith('.mp3')
+        ? '.mp3'
+        : inputPath.toLowerCase().endsWith('.opus')
+        ? '.opus'
+        : '.flac';
+    var tempOutput = _buildOutputPath(inputPath, preferredExt);
+
+    String buildDecryptCommand(
+      String outputPath, {
+      required bool mapAudioOnly,
+      required String key,
+    }) {
+      final audioMap = mapAudioOnly ? '-map 0:a ' : '';
+      return '-v error -decryption_key "$key" -i "$inputPath" $audioMap-c copy "$outputPath" -y';
+    }
+
+    final keyCandidates = _buildDecryptionKeyCandidates(trimmedKey);
+    if (keyCandidates.isEmpty) {
+      _log.e('No usable decryption key candidates');
+      return null;
+    }
+
+    FFmpegResult? lastResult;
+    var decryptSucceeded = false;
+
+    for (final keyCandidate in keyCandidates) {
+      _log.d(
+        'Executing FFmpeg decrypt command (key length: ${keyCandidate.length})',
+      );
+      var result = await _execute(
+        buildDecryptCommand(
+          tempOutput,
+          mapAudioOnly: preferredExt == '.flac',
+          key: keyCandidate,
+        ),
+      );
+
+      // Fallback for uncommon streams that cannot be remuxed into FLAC.
+      if (!result.success && preferredExt == '.flac') {
+        final fallbackOutput = _buildOutputPath(inputPath, '.m4a');
+        final fallbackResult = await _execute(
+          buildDecryptCommand(
+            fallbackOutput,
+            mapAudioOnly: false,
+            key: keyCandidate,
+          ),
+        );
+        if (fallbackResult.success) {
+          tempOutput = fallbackOutput;
+          result = fallbackResult;
+        }
+      }
+
+      if (result.success) {
+        decryptSucceeded = true;
+        lastResult = result;
+        break;
+      }
+
+      try {
+        final tempFile = File(tempOutput);
+        if (await tempFile.exists()) {
+          await tempFile.delete();
+        }
+      } catch (_) {}
+      lastResult = result;
+    }
+
+    if (!decryptSucceeded) {
+      _log.e('FFmpeg decrypt failed: ${lastResult?.output ?? 'unknown error'}');
+      return null;
+    }
+
+    try {
+      final tempFile = File(tempOutput);
+      final inputFile = File(inputPath);
+      if (!await tempFile.exists()) {
+        _log.e('Decrypted output file not found: $tempOutput');
+        return null;
+      }
+
+      if (deleteOriginal && await inputFile.exists()) {
+        await inputFile.delete();
+      }
+      return tempOutput;
+    } catch (e) {
+      _log.e('Failed to finalize decrypted file: $e');
+      return null;
+    }
+  }
+
   static Future<String?> convertFlacToMp3(
     String inputPath, {
     String bitrate = '320k',
@@ -616,6 +763,97 @@ class FFmpegService {
     }
   }
 
+  /// Unified audio format conversion with full metadata + cover preservation.
+  /// Supports: FLAC/MP3/Opus -> MP3/Opus (any direction except same format).
+  /// Returns the new file path on success, null on failure.
+  static Future<String?> convertAudioFormat({
+    required String inputPath,
+    required String targetFormat,
+    required String bitrate,
+    required Map<String, String> metadata,
+    String? coverPath,
+    bool deleteOriginal = true,
+  }) async {
+    final format = targetFormat.toLowerCase();
+    if (format != 'mp3' && format != 'opus') {
+      _log.e('Unsupported target format: $targetFormat');
+      return null;
+    }
+
+    final extension = format == 'opus' ? '.opus' : '.mp3';
+    final outputPath = _buildOutputPath(inputPath, extension);
+
+    // Step 1: Convert audio
+    String command;
+    if (format == 'opus') {
+      command =
+          '-i "$inputPath" -codec:a libopus -b:a $bitrate -vbr on -compression_level 10 -map 0:a "$outputPath" -y';
+    } else {
+      command =
+          '-i "$inputPath" -codec:a libmp3lame -b:a $bitrate -map 0:a -id3v2_version 3 "$outputPath" -y';
+    }
+
+    _log.i(
+      'Converting ${inputPath.split(Platform.pathSeparator).last} to $format @ $bitrate',
+    );
+    final result = await _execute(command);
+
+    if (!result.success) {
+      _log.e('Audio conversion failed: ${result.output}');
+      return null;
+    }
+
+    // Step 2: Embed metadata + cover into the converted file.
+    // Treat embed failure as conversion failure when metadata/cover was requested.
+    final hasMetadata = metadata.values.any((v) => v.trim().isNotEmpty);
+    final hasCover = coverPath != null && coverPath.trim().isNotEmpty;
+    if (hasMetadata || hasCover) {
+      String? embedResult;
+      if (format == 'mp3') {
+        embedResult = await embedMetadataToMp3(
+          mp3Path: outputPath,
+          coverPath: coverPath,
+          metadata: metadata,
+        );
+      } else {
+        embedResult = await embedMetadataToOpus(
+          opusPath: outputPath,
+          coverPath: coverPath,
+          metadata: metadata,
+        );
+      }
+
+      if (embedResult == null) {
+        _log.e(
+          'Metadata/Cover preservation failed, rolling back converted file',
+        );
+        try {
+          final out = File(outputPath);
+          if (await out.exists()) {
+            await out.delete();
+          }
+        } catch (e) {
+          _log.w('Failed to cleanup failed converted file: $e');
+        }
+        return null;
+      }
+    }
+
+    // Step 3: Delete original if requested
+    if (deleteOriginal) {
+      try {
+        await File(inputPath).delete();
+        _log.i(
+          'Deleted original: ${inputPath.split(Platform.pathSeparator).last}',
+        );
+      } catch (e) {
+        _log.w('Failed to delete original: $e');
+      }
+    }
+
+    return outputPath;
+  }
+
   static Map<String, String> _convertToId3Tags(
     Map<String, String> vorbisMetadata,
   ) {

lib/services/history_database.dart

@@ -17,21 +17,21 @@ String? _currentContainerPath;
 class HistoryDatabase {
   static final HistoryDatabase instance = HistoryDatabase._init();
   static Database? _database;
-  
+
   HistoryDatabase._init();
-  
+
   Future<Database> get database async {
     if (_database != null) return _database!;
     _database = await _initDB('history.db');
     return _database!;
   }
-  
+
   Future<Database> _initDB(String fileName) async {
     final dbPath = await getApplicationDocumentsDirectory();
     final path = join(dbPath.path, fileName);
-    
+
     _log.i('Initializing database at: $path');
-    
+
     return await openDatabase(
       path,
       version: 3,
@@ -39,10 +39,10 @@ class HistoryDatabase {
       onUpgrade: _upgradeDB,
     );
   }
-  
+
   Future<void> _createDB(Database db, int version) async {
     _log.i('Creating database schema v$version');
-    
+
     await db.execute('''
       CREATE TABLE history (
         id TEXT PRIMARY KEY,
@@ -73,16 +73,20 @@ class HistoryDatabase {
         copyright TEXT
       )
     ''');
-    
+
     // Indexes for fast lookups
     await db.execute('CREATE INDEX idx_spotify_id ON history(spotify_id)');
     await db.execute('CREATE INDEX idx_isrc ON history(isrc)');
-    await db.execute('CREATE INDEX idx_downloaded_at ON history(downloaded_at DESC)');
+    await db.execute(
-    await db.execute('CREATE INDEX idx_album ON history(album_name, album_artist)');
+      'CREATE INDEX idx_downloaded_at ON history(downloaded_at DESC)',
-    
+    );
+    await db.execute(
+      'CREATE INDEX idx_album ON history(album_name, album_artist)',
+    );
+
     _log.i('Database schema created with indexes');
   }
-  
+
   Future<void> _upgradeDB(Database db, int oldVersion, int newVersion) async {
     _log.i('Upgrading database from v$oldVersion to v$newVersion');
     if (oldVersion < 2) {
@@ -95,20 +99,20 @@ class HistoryDatabase {
       await db.execute('ALTER TABLE history ADD COLUMN saf_repaired INTEGER');
     }
   }
-  
+
   // ==================== iOS Path Normalization ====================
-  
+
   /// Pattern to match iOS container paths
   /// Example: /var/mobile/Containers/Data/Application/UUID-HERE/Documents/...
   static final _iosContainerPattern = RegExp(
     r'/var/mobile/Containers/Data/Application/[A-F0-9\-]+/',
     caseSensitive: false,
   );
-  
+
   /// Initialize and cache the current iOS container path
   Future<void> _initContainerPath() async {
     if (!Platform.isIOS || _currentContainerPath != null) return;
-    
+
     try {
       final docDir = await getApplicationDocumentsDirectory();
       // Extract container path up to and including the UUID folder
@@ -122,55 +126,58 @@ class HistoryDatabase {
       _log.w('Failed to get iOS container path: $e');
     }
   }
-  
+
   /// Normalize iOS file path by replacing old container UUID with current one
   /// This fixes the issue where iOS changes container UUID after app updates
   String _normalizeIosPath(String? filePath) {
     if (filePath == null || filePath.isEmpty) return filePath ?? '';
     if (!Platform.isIOS || _currentContainerPath == null) return filePath;
-    
+
     // Check if path contains an iOS container path
     if (_iosContainerPattern.hasMatch(filePath)) {
-      final normalized = filePath.replaceFirst(_iosContainerPattern, _currentContainerPath!);
+      final normalized = filePath.replaceFirst(
+        _iosContainerPattern,
+        _currentContainerPath!,
+      );
       if (normalized != filePath) {
         _log.d('Normalized iOS path: $filePath -> $normalized');
       }
       return normalized;
     }
-    
+
     return filePath;
   }
-  
+
   /// Migrate iOS paths in database to use current container UUID
   /// This is called once after app update if container changed
   Future<bool> migrateIosContainerPaths() async {
     if (!Platform.isIOS) return false;
-    
+
     await _initContainerPath();
     if (_currentContainerPath == null) return false;
-    
+
     final prefs = await _prefs;
     final lastContainer = prefs.getString('ios_last_container_path');
-    
+
     if (lastContainer == _currentContainerPath) {
       _log.d('iOS container path unchanged, skipping migration');
       return false;
     }
-    
+
     _log.i('iOS container changed: $lastContainer -> $_currentContainerPath');
-    
+
     try {
       final db = await database;
-      
+
       // Get all items with iOS paths
       final rows = await db.query('history', columns: ['id', 'file_path']);
       int updatedCount = 0;
       final batch = db.batch();
-      
+
       for (final row in rows) {
         final id = row['id'] as String;
         final oldPath = row['file_path'] as String?;
-        
+
         if (oldPath != null && _iosContainerPattern.hasMatch(oldPath)) {
           final newPath = _normalizeIosPath(oldPath);
           if (newPath != oldPath) {
@@ -184,14 +191,14 @@ class HistoryDatabase {
           }
         }
       }
-      
+
       if (updatedCount > 0) {
         await batch.commit(noResult: true);
       }
-      
+
       // Save current container path
       await prefs.setString('ios_last_container_path', _currentContainerPath!);
-      
+
       _log.i('iOS path migration complete: $updatedCount paths updated');
       return updatedCount > 0;
     } catch (e, stack) {
@@ -199,32 +206,34 @@ class HistoryDatabase {
       return false;
     }
   }
-  
+
   /// Migrate data from SharedPreferences to SQLite
   /// Returns true if migration was performed, false if already migrated
   Future<bool> migrateFromSharedPreferences() async {
     final prefs = await _prefs;
     final migrationKey = 'history_migrated_to_sqlite';
-    
+
     if (prefs.getBool(migrationKey) == true) {
       _log.d('Already migrated to SQLite');
       return false;
     }
-    
+
     final jsonStr = prefs.getString('download_history');
     if (jsonStr == null || jsonStr.isEmpty) {
       _log.d('No SharedPreferences history to migrate');
       await prefs.setBool(migrationKey, true);
       return false;
     }
-    
+
     try {
       final List<dynamic> jsonList = jsonDecode(jsonStr);
-      _log.i('Migrating ${jsonList.length} items from SharedPreferences to SQLite');
+      _log.i(
-      
+        'Migrating ${jsonList.length} items from SharedPreferences to SQLite',
+      );
+
       final db = await database;
       final batch = db.batch();
-      
+
       for (final json in jsonList) {
         final map = json as Map<String, dynamic>;
         batch.insert(
@@ -233,20 +242,20 @@ class HistoryDatabase {
           conflictAlgorithm: ConflictAlgorithm.replace,
         );
       }
-      
+
       await batch.commit(noResult: true);
-      
+
       // Mark as migrated but keep old data for safety
       await prefs.setBool(migrationKey, true);
       _log.i('Migration complete: ${jsonList.length} items');
-      
+
       return true;
     } catch (e, stack) {
       _log.e('Migration failed: $e', e, stack);
       return false;
     }
   }
-  
+
   /// Convert JSON format (camelCase) to DB row (snake_case)
   Map<String, dynamic> _jsonToDbRow(Map<String, dynamic> json) {
     return {
@@ -278,7 +287,7 @@ class HistoryDatabase {
       'copyright': json['copyright'],
     };
   }
-  
+
   /// Convert DB row (snake_case) to JSON format (camelCase)
   /// Also normalizes iOS paths if container UUID changed
   Map<String, dynamic> _dbRowToJson(Map<String, dynamic> row) {
@@ -311,9 +320,9 @@ class HistoryDatabase {
       'copyright': row['copyright'],
     };
   }
-  
+
   // ==================== CRUD Operations ====================
-  
+
   /// Insert or update a history item
   Future<void> upsert(Map<String, dynamic> json) async {
     final db = await database;
@@ -323,7 +332,7 @@ class HistoryDatabase {
       conflictAlgorithm: ConflictAlgorithm.replace,
     );
   }
-  
+
   /// Get all history items ordered by download date (newest first)
   Future<List<Map<String, dynamic>>> getAll({int? limit, int? offset}) async {
     final db = await database;
@@ -335,7 +344,7 @@ class HistoryDatabase {
     );
     return rows.map(_dbRowToJson).toList();
   }
-  
+
   /// Get item by ID
   Future<Map<String, dynamic>?> getById(String id) async {
     final db = await database;
@@ -348,7 +357,7 @@ class HistoryDatabase {
     if (rows.isEmpty) return null;
     return _dbRowToJson(rows.first);
   }
-  
+
   /// Get item by Spotify ID - O(1) with index
   Future<Map<String, dynamic>?> getBySpotifyId(String spotifyId) async {
     final db = await database;
@@ -361,7 +370,7 @@ class HistoryDatabase {
     if (rows.isEmpty) return null;
     return _dbRowToJson(rows.first);
   }
-  
+
   /// Get item by ISRC - O(1) with index
   Future<Map<String, dynamic>?> getByIsrc(String isrc) async {
     final db = await database;
@@ -374,7 +383,7 @@ class HistoryDatabase {
     if (rows.isEmpty) return null;
     return _dbRowToJson(rows.first);
   }
-  
+
   /// Check if spotify_id exists - O(1) with index
   Future<bool> existsBySpotifyId(String spotifyId) async {
     final db = await database;
@@ -384,42 +393,42 @@ class HistoryDatabase {
     );
     return result.isNotEmpty;
   }
-  
+
   /// Get all spotify_ids as Set for fast in-memory lookup
   Future<Set<String>> getAllSpotifyIds() async {
     final db = await database;
     final rows = await db.rawQuery(
-      'SELECT spotify_id FROM history WHERE spotify_id IS NOT NULL AND spotify_id != ""'
+      'SELECT spotify_id FROM history WHERE spotify_id IS NOT NULL AND spotify_id != ""',
     );
     return rows.map((r) => r['spotify_id'] as String).toSet();
   }
-  
+
   /// Delete by ID
   Future<void> deleteById(String id) async {
     final db = await database;
     await db.delete('history', where: 'id = ?', whereArgs: [id]);
   }
-  
+
   /// Delete by Spotify ID
   Future<void> deleteBySpotifyId(String spotifyId) async {
     final db = await database;
     await db.delete('history', where: 'spotify_id = ?', whereArgs: [spotifyId]);
   }
-  
+
   /// Clear all history
   Future<void> clearAll() async {
     final db = await database;
     await db.delete('history');
     _log.i('Cleared all history');
   }
-  
+
   /// Get total count
   Future<int> getCount() async {
     final db = await database;
     final result = await db.rawQuery('SELECT COUNT(*) as count FROM history');
     return Sqflite.firstIntValue(result) ?? 0;
   }
-  
+
   /// Find existing item by spotify_id or isrc (for deduplication)
   Future<Map<String, dynamic>?> findExisting({
     String? spotifyId,
@@ -428,7 +437,7 @@ class HistoryDatabase {
     if (spotifyId != null && spotifyId.isNotEmpty) {
       final bySpotify = await getBySpotifyId(spotifyId);
       if (bySpotify != null) return bySpotify;
-      
+
       // Check for deezer: prefix matching
       if (spotifyId.startsWith('deezer:')) {
         final deezerId = spotifyId.substring(7);
@@ -442,31 +451,63 @@ class HistoryDatabase {
         if (rows.isNotEmpty) return _dbRowToJson(rows.first);
       }
     }
-    
+
     if (isrc != null && isrc.isNotEmpty) {
       return await getByIsrc(isrc);
     }
-    
+
     return null;
   }
-  
+
-/// Close database
+  /// Close database
   Future<void> close() async {
     final db = await database;
     await db.close();
     _database = null;
   }
-  
+
+  /// Update file path for a history entry (e.g. after format conversion)
+  Future<void> updateFilePath(
+    String id,
+    String newFilePath, {
+    String? newSafFileName,
+    String? newQuality,
+    int? newBitDepth,
+    int? newSampleRate,
+    bool clearAudioSpecs = false,
+  }) async {
+    final db = await database;
+    final values = <String, dynamic>{'file_path': newFilePath};
+    if (newSafFileName != null) {
+      values['saf_file_name'] = newSafFileName;
+    }
+    if (newQuality != null) {
+      values['quality'] = newQuality;
+    }
+    if (clearAudioSpecs) {
+      values['bit_depth'] = null;
+      values['sample_rate'] = null;
+    } else {
+      if (newBitDepth != null) {
+        values['bit_depth'] = newBitDepth;
+      }
+      if (newSampleRate != null) {
+        values['sample_rate'] = newSampleRate;
+      }
+    }
+    await db.update('history', values, where: 'id = ?', whereArgs: [id]);
+  }
+
   /// Get all file paths from download history
   /// Used to exclude downloaded files from local library scan
   Future<Set<String>> getAllFilePaths() async {
     final db = await database;
     final rows = await db.rawQuery(
-      'SELECT file_path FROM history WHERE file_path IS NOT NULL AND file_path != ""'
+      'SELECT file_path FROM history WHERE file_path IS NOT NULL AND file_path != ""',
     );
     return rows.map((r) => r['file_path'] as String).toSet();
   }
-  
+
   /// Get all entries with file paths for orphan detection
   /// Returns list of (id, file_path, storage_mode, download_tree_uri, saf_relative_dir, saf_file_name)
   Future<List<Map<String, dynamic>>> getAllEntriesWithPaths() async {
@@ -478,18 +519,24 @@ class HistoryDatabase {
     ''');
     return rows.map((r) => Map<String, dynamic>.from(r)).toList();
   }
-  
+
   /// Delete multiple entries by IDs
   Future<int> deleteByIds(List<String> ids) async {
     if (ids.isEmpty) return 0;
-    
+
     final db = await database;
-    final placeholders = List.filled(ids.length, '?').join(',');
+    var totalDeleted = 0;
-    final count = await db.rawDelete(
+    const chunkSize = 500;
-      'DELETE FROM history WHERE id IN ($placeholders)',
+    for (var i = 0; i < ids.length; i += chunkSize) {
-      ids,
+      final end = (i + chunkSize < ids.length) ? i + chunkSize : ids.length;
-    );
+      final chunk = ids.sublist(i, end);
-    _log.i('Deleted $count orphaned entries');
+      final placeholders = List.filled(chunk.length, '?').join(',');
-    return count;
+      totalDeleted += await db.rawDelete(
+        'DELETE FROM history WHERE id IN ($placeholders)',
+        chunk,
+      );
+    }
+    _log.i('Deleted $totalDeleted orphaned entries');
+    return totalDeleted;
   }
 }

lib/services/library_database.dart

@@ -229,6 +229,7 @@ class LibraryDatabase {
   }
   
   Future<void> upsertBatch(List<Map<String, dynamic>> items) async {
+    if (items.isEmpty) return;
     final db = await database;
     final batch = db.batch();
     
@@ -350,16 +351,46 @@ class LibraryDatabase {
   Future<int> cleanupMissingFiles() async {
     final db = await database;
     final rows = await db.query('library', columns: ['id', 'file_path']);
-    
+
-    int removed = 0;
+    final missingIds = <String>[];
-    for (final row in rows) {
+    const checkChunkSize = 16;
-      final filePath = row['file_path'] as String;
+    for (var i = 0; i < rows.length; i += checkChunkSize) {
-      if (!await fileExists(filePath)) {
+      final end = (i + checkChunkSize < rows.length)
-        await db.delete('library', where: 'id = ?', whereArgs: [row['id']]);
+          ? i + checkChunkSize
-        removed++;
+          : rows.length;
+      final chunk = rows.sublist(i, end);
+      final checks = await Future.wait<MapEntry<String, bool>>(
+        chunk.map((row) async {
+          final id = row['id'] as String;
+          final filePath = row['file_path'] as String;
+          return MapEntry(id, await fileExists(filePath));
+        }),
+      );
+      for (final check in checks) {
+        if (!check.value) {
+          missingIds.add(check.key);
+        }
       }
     }
-    
+
+    if (missingIds.isEmpty) {
+      return 0;
+    }
+
+    var removed = 0;
+    const deleteChunkSize = 500;
+    for (var i = 0; i < missingIds.length; i += deleteChunkSize) {
+      final end = (i + deleteChunkSize < missingIds.length)
+          ? i + deleteChunkSize
+          : missingIds.length;
+      final idChunk = missingIds.sublist(i, end);
+      final placeholders = List.filled(idChunk.length, '?').join(',');
+      removed += await db.rawDelete(
+        'DELETE FROM library WHERE id IN ($placeholders)',
+        idChunk,
+      );
+    }
+
     if (removed > 0) {
       _log.i('Cleaned up $removed missing files from library');
     }
@@ -440,14 +471,22 @@ class LibraryDatabase {
   Future<int> deleteByPaths(List<String> filePaths) async {
     if (filePaths.isEmpty) return 0;
     final db = await database;
-    final placeholders = List.filled(filePaths.length, '?').join(',');
+    var totalDeleted = 0;
-    final result = await db.rawDelete(
+    const chunkSize = 500;
-      'DELETE FROM library WHERE file_path IN ($placeholders)',
+    for (var i = 0; i < filePaths.length; i += chunkSize) {
-      filePaths,
+      final end = (i + chunkSize < filePaths.length)
-    );
+          ? i + chunkSize
-    if (result > 0) {
+          : filePaths.length;
-      _log.i('Deleted $result items from library');
+      final chunk = filePaths.sublist(i, end);
+      final placeholders = List.filled(chunk.length, '?').join(',');
+      totalDeleted += await db.rawDelete(
+        'DELETE FROM library WHERE file_path IN ($placeholders)',
+        chunk,
+      );
     }
-    return result;
+    if (totalDeleted > 0) {
+      _log.i('Deleted $totalDeleted items from library');
+    }
+    return totalDeleted;
   }
 }

lib/utils/logger.dart

@@ -8,6 +8,27 @@ import 'package:spotiflac_android/constants/app_info.dart';
 import 'package:spotiflac_android/services/platform_bridge.dart';
 
 const int _maxLogMessageLength = 500;
+const String _redactedValue = '[REDACTED]';
+
+final RegExp _authorizationBearerPattern = RegExp(
+  r'\bAuthorization\b\s*[:=]\s*Bearer\s+[A-Za-z0-9._~+/\-]+=*',
+  caseSensitive: false,
+);
+
+final RegExp _genericSensitiveKeyValuePattern = RegExp(
+  r'\b(access[_\s-]?token|refresh[_\s-]?token|id[_\s-]?token|client[_\s-]?secret|authorization|password|api[_\s-]?key)\b(\s*[:=]\s*)([^\s,;]+)',
+  caseSensitive: false,
+);
+
+final RegExp _sensitiveQueryPattern = RegExp(
+  r'([?&](?:access_token|refresh_token|id_token|token|client_secret|api_key|apikey|password)=)[^&\s]+',
+  caseSensitive: false,
+);
+
+final RegExp _bearerTokenPattern = RegExp(
+  r'\bBearer\s+[A-Za-z0-9._~+/\-]+=*',
+  caseSensitive: false,
+);
 
 String _truncateLogText(String value, {int maxLength = _maxLogMessageLength}) {
   if (value.length <= maxLength) {
@@ -16,6 +37,33 @@ String _truncateLogText(String value, {int maxLength = _maxLogMessageLength}) {
   return '${value.substring(0, maxLength)}...[truncated]';
 }
 
+String _redactSensitiveText(String value) {
+  var redacted = value;
+
+  redacted = redacted.replaceAllMapped(_authorizationBearerPattern, (_) {
+    return 'Authorization: Bearer $_redactedValue';
+  });
+
+  redacted = redacted.replaceAllMapped(_genericSensitiveKeyValuePattern, (
+    match,
+  ) {
+    final key = match.group(1) ?? '';
+    final delimiter = match.group(2) ?? '=';
+    return '$key$delimiter$_redactedValue';
+  });
+
+  redacted = redacted.replaceAllMapped(_sensitiveQueryPattern, (match) {
+    final prefix = match.group(1) ?? '';
+    return '$prefix$_redactedValue';
+  });
+
+  redacted = redacted.replaceAllMapped(_bearerTokenPattern, (_) {
+    return 'Bearer $_redactedValue';
+  });
+
+  return redacted;
+}
+
 class LogEntry {
   final DateTime timestamp;
   final String level;
@@ -59,6 +107,7 @@ class LogBuffer extends ChangeNotifier {
   final Queue<LogEntry> _entries = Queue<LogEntry>();
   Timer? _goLogTimer;
   int _lastGoLogIndex = 0;
+  bool _isFetchingGoLogs = false;
 
   static bool _loggingEnabled = false;
   static bool get loggingEnabled => _loggingEnabled;
@@ -79,9 +128,11 @@ class LogBuffer extends ChangeNotifier {
       return;
     }
 
-    final sanitizedMessage = _truncateLogText(entry.message);
+    final sanitizedMessage = _truncateLogText(
+      _redactSensitiveText(entry.message),
+    );
     final sanitizedError = entry.error != null
-        ? _truncateLogText(entry.error!)
+        ? _truncateLogText(_redactSensitiveText(entry.error!))
         : null;
     final sanitizedEntry =
         (sanitizedMessage == entry.message && sanitizedError == entry.error)
@@ -105,13 +156,20 @@ class LogBuffer extends ChangeNotifier {
   void startGoLogPolling() {
     _goLogTimer?.cancel();
     _goLogTimer = Timer.periodic(_goLogPollingInterval, (_) async {
-      await _fetchGoLogs();
+      if (_isFetchingGoLogs) return;
+      _isFetchingGoLogs = true;
+      try {
+        await _fetchGoLogs();
+      } finally {
+        _isFetchingGoLogs = false;
+      }
     });
   }
 
   void stopGoLogPolling() {
     _goLogTimer?.cancel();
     _goLogTimer = null;
+    _isFetchingGoLogs = false;
   }
 
   Future<void> _fetchGoLogs() async {
@@ -119,10 +177,15 @@ class LogBuffer extends ChangeNotifier {
       final result = await PlatformBridge.getGoLogsSince(_lastGoLogIndex);
       final logs = result['logs'] as List<dynamic>? ?? [];
       final nextIndex = result['next_index'] as int? ?? _lastGoLogIndex;
+      final keepNonErrorLogs = _loggingEnabled;
 
       for (final log in logs) {
-        final timestamp = log['timestamp'] as String? ?? '';
         final level = log['level'] as String? ?? 'INFO';
+        if (!keepNonErrorLogs && level != 'ERROR' && level != 'FATAL') {
+          continue;
+        }
+
+        final timestamp = log['timestamp'] as String? ?? '';
         final tag = log['tag'] as String? ?? 'Go';
         final message = log['message'] as String? ?? '';
 
@@ -211,7 +274,11 @@ class LogBuffer extends ChangeNotifier {
         buffer.writeln(
           'Android Version: ${android.version.release} (SDK ${android.version.sdkInt})',
         );
-        buffer.writeln('Device ID: ${android.id}');
+        buffer.writeln('Build ID: ${android.id}');
+        if (android.version.securityPatch != null &&
+            android.version.securityPatch!.isNotEmpty) {
+          buffer.writeln('Security Patch: ${android.version.securityPatch}');
+        }
         buffer.writeln('Hardware: ${android.hardware}');
         buffer.writeln('Product: ${android.product}');
         buffer.writeln('Supported ABIs: ${android.supportedAbis.join(', ')}');
@@ -308,12 +375,14 @@ class BufferedOutput extends LogOutput {
   void output(OutputEvent event) {
     if (kDebugMode) {
       for (final line in event.lines) {
-        debugPrint(_truncateLogText(line));
+        debugPrint(_truncateLogText(_redactSensitiveText(line)));
       }
     }
 
     final level = _levelToString(event.level);
-    final message = _truncateLogText(event.lines.join('\n'));
+    final message = _truncateLogText(
+      _redactSensitiveText(event.lines.join('\n')),
+    );
 
     LogBuffer().add(
       LogEntry(
@@ -372,6 +441,10 @@ class AppLogger {
   }
 
   void _addToBuffer(String level, String message, {String? error}) {
+    if (!LogBuffer.loggingEnabled && level != 'ERROR' && level != 'FATAL') {
+      return;
+    }
+
     LogBuffer().add(
       LogEntry(
         timestamp: DateTime.now(),
@@ -412,7 +485,7 @@ class AppLogger {
       _addToBuffer('ERROR', message, error: error.toString());
       if (kDebugMode) {
         debugPrint(
-          '[$_tag] ERROR: ${_truncateLogText(message)} | ${_truncateLogText(error.toString())}',
+          '[$_tag] ERROR: ${_truncateLogText(_redactSensitiveText(message))} | ${_truncateLogText(_redactSensitiveText(error.toString()))}',
         );
         if (stackTrace != null) {
           debugPrint(stackTrace.toString());

lib/widgets/donate_icons.dart

@@ -84,83 +84,6 @@ class _KofiPainter extends CustomPainter {
   bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
 }
 
-class BmacIcon extends StatelessWidget {
-  final double size;
-  final Color color;
-
-  const BmacIcon({super.key, this.size = 22, this.color = Colors.black87});
-
-  @override
-  Widget build(BuildContext context) {
-    return CustomPaint(
-      size: Size(size, size),
-      painter: _BmacPainter(color),
-    );
-  }
-}
-
-class _BmacPainter extends CustomPainter {
-  final Color color;
-  _BmacPainter(this.color);
-
-  @override
-  void paint(Canvas canvas, Size size) {
-    final s = size.width;
-    final paint = Paint()
-      ..color = color
-      ..style = PaintingStyle.fill;
-
-    // Cup body (slightly tapered)
-    final cup = Path()
-      ..moveTo(s * 0.15, s * 0.35)
-      ..lineTo(s * 0.20, s * 0.82)
-      ..quadraticBezierTo(s * 0.20, s * 0.90, s * 0.28, s * 0.90)
-      ..lineTo(s * 0.56, s * 0.90)
-      ..quadraticBezierTo(s * 0.64, s * 0.90, s * 0.64, s * 0.82)
-      ..lineTo(s * 0.69, s * 0.35)
-      ..close();
-    canvas.drawPath(cup, paint);
-
-    // Cup rim
-    final rim = RRect.fromRectAndRadius(
-      Rect.fromLTWH(s * 0.10, s * 0.30, s * 0.64, s * 0.10),
-      Radius.circular(s * 0.05),
-    );
-    canvas.drawRRect(rim, paint);
-
-    // Handle
-    final handlePaint = Paint()
-      ..color = color
-      ..style = PaintingStyle.stroke
-      ..strokeWidth = s * 0.07
-      ..strokeCap = StrokeCap.round;
-
-    final handle = Path()
-      ..moveTo(s * 0.69, s * 0.42)
-      ..quadraticBezierTo(s * 0.90, s * 0.42, s * 0.90, s * 0.56)
-      ..quadraticBezierTo(s * 0.90, s * 0.70, s * 0.69, s * 0.70);
-    canvas.drawPath(handle, handlePaint);
-
-    // Steam
-    final steamPaint = Paint()
-      ..color = color.withValues(alpha: 0.5)
-      ..style = PaintingStyle.stroke
-      ..strokeWidth = s * 0.04
-      ..strokeCap = StrokeCap.round;
-
-    for (var i = 0; i < 3; i++) {
-      final sx = s * (0.26 + i * 0.14);
-      final steam = Path()
-        ..moveTo(sx, s * 0.26)
-        ..quadraticBezierTo(sx + s * 0.03, s * 0.18, sx, s * 0.10);
-      canvas.drawPath(steam, steamPaint);
-    }
-  }
-
-  @override
-  bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
-}
-
 class GitHubIcon extends StatelessWidget {
   final double size;
   final Color color;

lib/widgets/download_service_picker.dart

@@ -22,8 +22,7 @@ class BuiltInService {
   });
 }
 
-/// Default quality options for built-in services (Tidal, Qobuz, YouTube)
+/// Default quality options for built-in services (Tidal, Qobuz, Amazon, YouTube)
-/// Note: Amazon is fallback-only and not shown in picker
 /// Note: Tidal lossy (HIGH) removed - use YouTube for lossy downloads
 const _builtInServices = [
   BuiltInService(
@@ -44,6 +43,17 @@ const _builtInServices = [
       QualityOption(id: 'HI_RES_LOSSLESS', label: 'Hi-Res FLAC Max', description: '24-bit / up to 192kHz'),
     ],
   ),
+  BuiltInService(
+    id: 'amazon',
+    label: 'Amazon',
+    qualityOptions: [
+      QualityOption(
+        id: 'LOSSLESS',
+        label: 'FLAC Best Available',
+        description: 'Amazon API delivers the best available lossless quality',
+      ),
+    ],
+  ),
   BuiltInService(
     id: 'youtube',
     label: 'YouTube',

pubspec.yaml

@@ -1,7 +1,7 @@
 name: spotiflac_android
 description: Download Spotify tracks in FLAC from Tidal, Qobuz & Amazon Music
 publish_to: "none"
-version: 3.6.0+77
+version: 3.6.5+79
 
 environment:
   sdk: ^3.10.0