docs: fix #108 reference in changelog - MP3 403 error fix

- Add ProGuard rules for Flutter plugins (path_provider, local_notifications, receive_sharing_intent, etc.)
- Upgrade Go to 1.25.6 for 16KB page alignment support
- Expand ProGuard rules for Go backend and Kotlin coroutines
- Fix R8 stripping plugin implementations in release builds

.github/workflows/release.yml

@@ -71,7 +71,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.21"
+          go-version: "1.25"
           cache-dependency-path: go_backend/go.sum
 
       # Cache Gradle for faster builds
@@ -174,7 +174,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.21"
+          go-version: "1.25"
           cache-dependency-path: go_backend/go.sum
 
       # Cache CocoaPods

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## [3.3.0] - 2026-01-31
+## [3.3.1] - 2026-02-01
 
 ### Added
 
@@ -15,12 +15,13 @@
 
 ### Changed
 
-- **Amazon Download API**: Switched to AfkarXYZ API ([#108](https://github.com/zarzet/SpotiFLAC-Mobile/issues/108))
+- **Amazon Download API**: Switched to AfkarXYZ API
-- **Qobuz Download API**: Added Jumo API as fallback ([#108](https://github.com/zarzet/SpotiFLAC-Mobile/issues/108))
+- **Qobuz Download API**: Added Jumo API as fallback
 - **Search Results**: Reduced artist limit from 5 to 2
 
 ### Fixed
 
+- **MP3 Download Error 403**: Fixed 403 Forbidden error when downloading MP3 files ([#108](https://github.com/zarzet/SpotiFLAC-Mobile/issues/108))
 - **Opus Cover Art**: Implemented METADATA_BLOCK_PICTURE for proper cover embedding
 - **Deezer Pagination**: Fixed >25 tracks only showing first 25 ([#112](https://github.com/zarzet/SpotiFLAC-Mobile/issues/112))
 - **Duplicate Embed Lyrics Setting**: Removed from Options page ([#110](https://github.com/zarzet/SpotiFLAC-Mobile/issues/110))

android/app/proguard-rules.pro

@@ -5,6 +5,7 @@
 -keep class io.flutter.view.** { *; }
 -keep class io.flutter.** { *; }
 -keep class io.flutter.plugins.** { *; }
+-keep class io.flutter.embedding.** { *; }
 
 # Ignore missing Play Core classes (not used, but referenced by Flutter)
 -dontwarn com.google.android.play.core.splitcompat.**
@@ -14,9 +15,15 @@
 # Ignore missing javax.xml.stream (not used on Android)
 -dontwarn javax.xml.stream.**
 
-# Go backend (gobackend.aar)
+# Go backend (gobackend.aar) - CRITICAL for release builds
 -keep class gobackend.** { *; }
 -keep class go.** { *; }
+-keep interface gobackend.** { *; }
+-keepclassmembers class gobackend.** { *; }
+
+# Go mobile binding internals
+-keep class org.golang.** { *; }
+-dontwarn org.golang.**
 
 # FFmpeg Kit
 -keep class com.arthenica.ffmpegkit.** { *; }
@@ -30,15 +37,77 @@
     native <methods>;
 }
 
-# Kotlin coroutines
+# Kotlin coroutines - expanded rules
 -keepnames class kotlinx.coroutines.internal.MainDispatcherFactory {}
 -keepnames class kotlinx.coroutines.CoroutineExceptionHandler {}
 -keepclassmembers class kotlinx.coroutines.** {
     volatile <fields>;
 }
+-keepclassmembernames class kotlinx.** {
+    volatile <fields>;
+}
+-dontwarn kotlinx.coroutines.**
+
+# Kotlin serialization
+-keepattributes RuntimeVisibleAnnotations,AnnotationDefault
+-dontwarn kotlin.**
+-keep class kotlin.** { *; }
+-keep class kotlin.Metadata { *; }
+
+# Keep MainActivity and related classes
+-keep class com.zarz.spotiflac.** { *; }
 
 # Prevent R8 from removing metadata
 -keepattributes *Annotation*
 -keepattributes SourceFile,LineNumberTable
 -keepattributes Signature
 -keepattributes Exceptions
+-keepattributes InnerClasses
+-keepattributes EnclosingMethod
+
+# JSON parsing (used by Go backend responses)
+-keep class org.json.** { *; }
+
+# Shared Preferences
+-keep class androidx.datastore.** { *; }
+-dontwarn androidx.datastore.**
+
+# Flutter Plugins - CRITICAL: Prevent R8 from removing plugin implementations
+# Path Provider
+-keep class io.flutter.plugins.pathprovider.** { *; }
+-keep class dev.flutter.pigeon.** { *; }
+
+# Local Notifications
+-keep class com.dexterous.** { *; }
+-keep class com.dexterous.flutterlocalnotifications.** { *; }
+
+# Receive Sharing Intent
+-keep class com.kasem.receive_sharing_intent.** { *; }
+
+# Permission Handler
+-keep class com.baseflow.permissionhandler.** { *; }
+
+# File Picker
+-keep class com.mr.flutter.plugin.filepicker.** { *; }
+
+# URL Launcher
+-keep class io.flutter.plugins.urllauncher.** { *; }
+
+# Share Plus
+-keep class dev.fluttercommunity.plus.share.** { *; }
+
+# Device Info Plus
+-keep class dev.fluttercommunity.plus.device_info.** { *; }
+
+# Open File
+-keep class com.crazecoder.openfile.** { *; }
+
+# Sqflite
+-keep class com.tekartik.sqflite.** { *; }
+
+# Dynamic Color
+-keep class io.material.** { *; }
+
+# Keep all Flutter plugin registrants
+-keep class io.flutter.plugins.GeneratedPluginRegistrant { *; }
+-keep class ** extends io.flutter.embedding.engine.plugins.FlutterPlugin { *; }

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

@@ -6,6 +6,7 @@ import io.flutter.embedding.android.FlutterActivity
 import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.embedding.engine.FlutterShellArgs
 import io.flutter.plugin.common.MethodChannel
+import io.flutter.plugins.GeneratedPluginRegistrant
 import gobackend.Gobackend
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -157,6 +158,7 @@ class MainActivity: FlutterActivity() {
 
     override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
         super.configureFlutterEngine(flutterEngine)
+        GeneratedPluginRegistrant.registerWith(flutterEngine)
         
         MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL).setMethodCallHandler { call, result ->
             scope.launch {

go_backend/go.mod

@@ -1,8 +1,8 @@
 module github.com/zarz/spotiflac_android/go_backend
 
-go 1.24.0
+go 1.25.0
 
-toolchain go1.24.5
+toolchain go1.25.6
 
 require (
 	github.com/dop251/goja v0.0.0-20260106131823-651366fbe6e3

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 = '3.3.0';
+static const String version = '3.3.1';
-  static const String buildNumber = '67';
+  static const String buildNumber = '68';
   static const String fullVersion = '$version+$buildNumber';
   
   

lib/l10n/app_localizations_id.dart

@@ -2133,70 +2133,70 @@ class AppLocalizationsId extends AppLocalizations {
   }
 
   @override
-  String get discographyDownload => 'Unduh Diskografi';
+  String get discographyDownload => 'Download Discography';
 
   @override
   String get discographyDownloadAll => 'Unduh Semua';
 
   @override
   String discographyDownloadAllSubtitle(int count, int albumCount) {
-    return '$count lagu dari $albumCount rilis';
+    return '$count tracks from $albumCount releases';
   }
 
   @override
-  String get discographyAlbumsOnly => 'Album Saja';
+  String get discographyAlbumsOnly => 'Albums Only';
 
   @override
   String discographyAlbumsOnlySubtitle(int count, int albumCount) {
-    return '$count lagu dari $albumCount album';
+    return '$count tracks from $albumCount albums';
   }
 
   @override
-  String get discographySinglesOnly => 'Single & EP Saja';
+  String get discographySinglesOnly => 'Singles & EPs Only';
 
   @override
   String discographySinglesOnlySubtitle(int count, int albumCount) {
-    return '$count lagu dari $albumCount single';
+    return '$count tracks from $albumCount singles';
   }
 
   @override
-  String get discographySelectAlbums => 'Pilih Album...';
+  String get discographySelectAlbums => 'Select Albums...';
 
   @override
   String get discographySelectAlbumsSubtitle =>
-      'Pilih album atau single tertentu';
+      'Choose specific albums or singles';
 
   @override
-  String get discographyFetchingTracks => 'Mengambil lagu...';
+  String get discographyFetchingTracks => 'Fetching tracks...';
 
   @override
   String discographyFetchingAlbum(int current, int total) {
-    return 'Mengambil $current dari $total...';
+    return 'Fetching $current of $total...';
   }
 
   @override
   String discographySelectedCount(int count) {
-    return '$count dipilih';
+    return '$count selected';
   }
 
   @override
-  String get discographyDownloadSelected => 'Unduh yang Dipilih';
+  String get discographyDownloadSelected => 'Download Selected';
 
   @override
   String discographyAddedToQueue(int count) {
-    return 'Menambahkan $count lagu ke antrian';
+    return 'Added $count tracks to queue';
   }
 
   @override
   String discographySkippedDownloaded(int added, int skipped) {
-    return '$added ditambahkan, $skipped sudah diunduh';
+    return '$added added, $skipped already downloaded';
   }
 
   @override
-  String get discographyNoAlbums => 'Tidak ada album tersedia';
+  String get discographyNoAlbums => 'No albums available';
 
   @override
-  String get discographyFailedToFetch => 'Gagal mengambil beberapa album';
+  String get discographyFailedToFetch => 'Failed to fetch some albums';
 
   @override
   String get sectionStorageAccess => 'Storage Access';

pubspec.yaml

@@ -1,7 +1,7 @@
 name: spotiflac_android
 description: Download Spotify tracks in FLAC from Tidal, Qobuz & Amazon Music
 publish_to: "none"
-version: 3.3.0+67
+version: 3.3.1+68
 
 environment:
   sdk: ^3.10.0