通知中心封面图显示

部分界面的信息更新
缓存系统初步引入
即将进入播放列表更新

lib/metadata/metadata_reader.dart

@@ -1,5 +1,6 @@
 // lib/metadata/metadata_reader.dart
 import 'dart:io';
+import 'dart:typed_data';
 import 'package:flutter/foundation.dart';
 import 'package:audio_metadata_reader/audio_metadata_reader.dart' as amr;
 import 'metadata_model.dart';
@@ -7,13 +8,25 @@ import 'metadata_model.dart';
 class MetadataReader {
   Future<RawMetadata> readRawMetadata(File file) async {
     try {
-      // ⭐ getImage: true 读取封面图
       final meta = amr.readMetadata(file, getImage: true);
 
-      // ⭐ 提取第一张图片
+      debugPrint('📢 [MetadataReader] pictures count: ${meta.pictures.length}');
+
       Uint8List? artwork;
-      if (meta.pictures != null && meta.pictures!.isNotEmpty) {
-        artwork = meta.pictures.first.bytes;
+      if (meta.pictures.isNotEmpty) {
+        try {
+          final pic = meta.pictures.first;
+          // 尝试获取图片数据，兼容不同字段名
+          artwork = (pic as dynamic).bytes ?? (pic as dynamic).data;
+          if (artwork != null) {
+            debugPrint(
+                '📢 [MetadataReader] artwork extracted: ${artwork.length} bytes');
+          }
+        } catch (e) {
+          debugPrint('⚠️ [MetadataReader] artwork extraction failed: $e');
+        }
+      } else {
+        debugPrint('📢 [MetadataReader] no artwork found');
       }
 
       return RawMetadata(