fixup! TW-2881 Implement main MXC cache manager with tests

fixup! TW-2881 Implement main MXC cache manager with tests

Author: tddang-linagora

lib/data/cache/mxc_cache_manager.dart

@@ -1,4 +1,5 @@
 // lib/data/cache/mxc_cache_manager.dart
+import 'dart:async';
 import 'dart:typed_data';
 import 'package:matrix/matrix.dart';
 import 'database/cache_database_interface.dart';
@@ -195,7 +196,9 @@ class MxcCacheManager {
       memorySizeBytes: memoryStats.sizeBytes,
       memoryUtilization: memoryStats.utilizationPercent,
       diskSizeBytes: diskSize,
-      diskUtilization: (diskSize / _config.diskMaxBytes) * 100,
+      diskUtilization: _config.diskMaxBytes > 0
+          ? (diskSize / _config.diskMaxBytes) * 100
+          : 0,
     );
   }
 
@@ -222,6 +225,14 @@ class MxcCacheManager {
   void _onCacheUpdated(String mxcUrl, Uint8List newBytes) {
     // Update memory cache with fresh content
     _memoryTier.put(mxcUrl, newBytes);
+    // Also update disk tier using fire-and-forget
+    unawaited(
+      _diskTier.put(
+        mxcUrl: mxcUrl,
+        bytes: newBytes,
+        mediaType: 'application/octet-stream',
+      ),
+    );
     Logs().d('MxcCacheManager: updated $mxcUrl from background revalidation');
   }
 }