refactor(io): use deleteFileQuietly for exists-then-delete

Add deleteFileQuietly to file_access.dart (exists check, delete, swallow
errors) and use it for the try/exists/delete/catch (_) {} copies.

lib/providers/download_queue_provider_paths.dart

@@ -69,9 +69,7 @@ extension _DownloadQueuePaths on DownloadQueueNotifier {
       return false;
     } finally {
       if (probe != null) {
-        try {
-          if (await probe.exists()) await probe.delete();
-        } catch (_) {}
+        await deleteFileQuietly(probe);
       }
     }
   }

lib/providers/library_collections_provider.dart

@@ -11,6 +11,7 @@ import 'package:spotiflac_android/services/ffmpeg_service.dart';
 import 'package:spotiflac_android/services/library_collections_database.dart';
 import 'package:spotiflac_android/services/library_collections_hydration.dart';
 import 'package:spotiflac_android/services/collection_track_batch.dart';
+import 'package:spotiflac_android/utils/file_access.dart';
 import 'package:spotiflac_android/utils/logger.dart';
 
 export 'package:spotiflac_android/models/library_collections.dart';
@@ -684,10 +685,7 @@ class LibraryCollectionsNotifier extends Notifier<LibraryCollectionsState> {
         });
         _invalidatePlaylistPickerSummaries();
         if (previousCoverPath != null && previousCoverPath != destPath) {
-          try {
-            final previous = File(previousCoverPath);
-            if (await previous.exists()) await previous.delete();
-          } catch (_) {}
+          await deleteFileQuietly(File(previousCoverPath));
         }
       });
 
@@ -737,10 +735,7 @@ class LibraryCollectionsNotifier extends Notifier<LibraryCollectionsState> {
       await File(tempPath).rename(destPath);
       return destPath;
     } finally {
-      try {
-        final temp = File(tempPath);
-        if (await temp.exists()) await temp.delete();
-      } catch (_) {}
+      await deleteFileQuietly(File(tempPath));
     }
   }
 
@@ -862,9 +857,7 @@ class LibraryCollectionsNotifier extends Notifier<LibraryCollectionsState> {
                   sourcePath,
                 );
               } finally {
-                try {
-                  if (await source.exists()) await source.delete();
-                } catch (_) {}
+                await deleteFileQuietly(source);
               }
             } catch (_) {
               newCoverPath = null;

lib/services/backup_service.dart

@@ -12,6 +12,7 @@ import 'package:spotiflac_android/services/history_database.dart';
 import 'package:spotiflac_android/services/platform_bridge.dart';
 import 'package:spotiflac_android/services/sqlite_native_snapshot.dart';
 import 'package:spotiflac_android/services/user_profile_store.dart';
+import 'package:spotiflac_android/utils/file_access.dart';
 import 'package:spotiflac_android/utils/logger.dart';
 
 typedef BackupHistoryPageLoader =
@@ -343,9 +344,7 @@ class BackupService {
       try {
         if (await staging.exists()) await staging.delete(recursive: true);
       } catch (_) {}
-      try {
-        if (await partFile.exists()) await partFile.delete();
-      } catch (_) {}
+      await deleteFileQuietly(partFile);
     }
   }
 

lib/services/downloaded_embedded_cover_resolver.dart

@@ -1046,9 +1046,7 @@ class DownloadedEmbeddedCoverResolver {
   }
 
   static Future<void> _deleteFileIfPresent(File file) async {
-    try {
-      if (await file.exists()) await file.delete();
-    } catch (_) {}
+    await deleteFileQuietly(file);
   }
 
   static Future<void> _clearDirectoryContents(Directory directory) async {

lib/services/motion_artwork_store.dart

@@ -9,6 +9,7 @@ import 'package:path_provider/path_provider.dart';
 import 'package:spotiflac_android/services/ffmpeg_service.dart';
 import 'package:spotiflac_android/services/motion_artwork_download.dart';
 import 'package:spotiflac_android/services/motion_artwork_proxy.dart';
+import 'package:spotiflac_android/utils/file_access.dart';
 import 'package:spotiflac_android/utils/logger.dart';
 import 'package:spotiflac_android/utils/string_utils.dart';
 
@@ -171,9 +172,7 @@ class MotionArtworkStore {
       return null;
     } finally {
       for (final file in [temporary, infoTemporary]) {
-        try {
-          if (file != null && await file.exists()) await file.delete();
-        } catch (_) {}
+        if (file != null) await deleteFileQuietly(file);
       }
     }
   }

lib/services/platform_bridge.dart

@@ -7,6 +7,7 @@ import 'package:path_provider/path_provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:spotiflac_android/services/download_request_payload.dart';
 import 'package:spotiflac_android/utils/audio_format_utils.dart';
+import 'package:spotiflac_android/utils/file_access.dart';
 import 'package:spotiflac_android/utils/logger.dart';
 
 part 'platform_bridge/bridge_codec.dart';
@@ -1558,12 +1559,7 @@ class PlatformBridge {
   }
 
   static Future<void> _deleteFileIfExists(String path) async {
-    try {
-      final file = File(path);
-      if (await file.exists()) {
-        await file.delete();
-      }
-    } catch (_) {}
+    await deleteFileQuietly(File(path));
   }
 
   static Future<Directory> _nativeWorkerPayloadDir() async {

lib/services/platform_bridge/bridge_library_scan.dart

@@ -27,13 +27,8 @@ class LibraryScanNDJSONFile {
   }
 
   Future<void> delete() async {
-    try {
-      if (await file.exists()) await file.delete();
-    } catch (_) {}
+    await deleteFileQuietly(file);
     // Remove the resumable scan checkpoint after ingestion.
-    try {
-      final checkpoint = File('${file.path}.state');
-      if (await checkpoint.exists()) await checkpoint.delete();
-    } catch (_) {}
+    await deleteFileQuietly(File('${file.path}.state'));
   }
 }

lib/utils/ffmpeg_reenrich.dart

@@ -3,17 +3,13 @@ import 'dart:io';
 import 'package:spotiflac_android/services/ffmpeg_service.dart';
 import 'package:spotiflac_android/services/library_database.dart';
 import 'package:spotiflac_android/services/platform_bridge.dart';
+import 'package:spotiflac_android/utils/file_access.dart';
 import 'package:spotiflac_android/utils/lyrics_metadata_helper.dart';
 
 bool _hasValue(String? value) => value != null && value.trim().isNotEmpty;
 
 Future<void> _safeDeleteFile(String path) async {
-  try {
-    final file = File(path);
-    if (await file.exists()) {
-      await file.delete();
-    }
-  } catch (_) {}
+  await deleteFileQuietly(File(path));
 }
 
 Future<void> _cleanupTempFileAndParent(String path) async {

lib/utils/file_access.dart

@@ -249,6 +249,13 @@ class FileAccessStat {
   const FileAccessStat({this.size, this.modified});
 }
 
+/// Deletes [file] when it exists and swallows any error.
+Future<void> deleteFileQuietly(File file) async {
+  try {
+    if (await file.exists()) await file.delete();
+  } catch (_) {}
+}
+
 bool isContentUri(String? path) {
   return path != null && path.startsWith('content://');
 }