dispose images correctly

app/lib/domain/entities/equatable_image.dart

@@ -20,10 +20,28 @@
 import 'dart:ui';
 
 class EquatableImage {
-  final Image value;
+  Image? _value;
   final int _imageHash;
+  bool _isDisposed = false;
 
-  EquatableImage(this.value, {required int hash}) : _imageHash = hash;
+  EquatableImage(Image value, {required int hash})
+      : _value = value,
+        _imageHash = hash;
+
+  /// The underlying ui.Image. Returns null if disposed.
+  Image? get value => _isDisposed ? null : _value;
+
+  /// Whether this image has been disposed.
+  bool get isDisposed => _isDisposed;
+
+  /// Disposes the underlying ui.Image to free GPU memory.
+  /// This is safe to call multiple times.
+  void dispose() {
+    if (_isDisposed) return;
+    _isDisposed = true;
+    _value?.dispose();
+    _value = null;
+  }
 
   @override
   int get hashCode => _imageHash.hashCode;

app/lib/domain/services/generic_website.dart

@@ -86,11 +86,14 @@ class GenericWebsiteService extends _$GenericWebsiteService {
   //Global icon cache
   late CacheRepository _cacheRepository;
   //Local decoded icon cache
-  final LRUCache<String, BrowserIcon> _browserIconCache;
+  late final LRUCache<String, BrowserIcon> _browserIconCache;
 
   GenericWebsiteService()
     : _iconsService = GeckoIconService(),
-      _browserIconCache = LRUCache(50);
+      _browserIconCache = LRUCache(
+        50,
+        onEvict: (icon) => icon.image.dispose(),
+      );
 
   @override
   void build() {

app/lib/domain/services/generic_website.g.dart

@@ -42,7 +42,7 @@ final class GenericWebsiteServiceProvider
 }
 
 String _$genericWebsiteServiceHash() =>
-    r'44d6e4cc161b1200070d99e29c1db04cd18ca091';
+    r'32a561820bda432f3c17e05b9da9c85871efffb4';
 
 abstract class _$GenericWebsiteService extends $Notifier<void> {
   void build();