revert(ui): keep extension update check silent on failure

A failed check simply means no update chip; the failure toast and its
state field are removed.

ui/flutter/lib/features/extensions/application/extensions_controller.dart

@@ -49,7 +49,6 @@ class ExtensionsState {
     this.loadingMoreStore = false,
     this.busyExtensionIds = const {},
     this.devMode = false,
-    this.updateCheckFailed = false,
   });
 
   final List<Extension> installedExtensions;
@@ -64,7 +63,6 @@ class ExtensionsState {
   final bool loadingMoreStore;
   final Set<String> busyExtensionIds;
   final bool devMode;
-  final bool updateCheckFailed;
 
   UnmodifiableMapView<String, Extension> get installedMap =>
       UnmodifiableMapView({for (final ext in installedExtensions) ext.identity: ext});
@@ -102,7 +100,6 @@ class ExtensionsState {
     bool? loadingMoreStore,
     Set<String>? busyExtensionIds,
     bool? devMode,
-    bool? updateCheckFailed,
   }) {
     return ExtensionsState(
       installedExtensions: installedExtensions ?? this.installedExtensions,
@@ -117,7 +114,6 @@ class ExtensionsState {
       loadingMoreStore: loadingMoreStore ?? this.loadingMoreStore,
       busyExtensionIds: busyExtensionIds ?? this.busyExtensionIds,
       devMode: devMode ?? this.devMode,
-      updateCheckFailed: updateCheckFailed ?? this.updateCheckFailed,
     );
   }
 }
@@ -263,23 +259,15 @@ class ExtensionsController extends AsyncNotifier<ExtensionsState> {
 
   Future<void> checkUpdate() async {
     final flags = <String, String>{};
-    var failed = false;
     for (final ext in _current.installedExtensions) {
       try {
         final resp = await ref.read(gopeedServiceProvider).upgradeCheckExtension(ext.identity);
         if (resp.newVersion.isNotEmpty) {
           flags[ext.identity] = resp.newVersion;
         }
-      } catch (_) {
-        failed = true;
-      }
+      } catch (_) {}
     }
-    state = AsyncValue.data(
-      _current.copyWith(
-        updateFlags: flags,
-        updateCheckFailed: failed && _current.installedExtensions.isNotEmpty,
-      ),
-    );
+    state = AsyncValue.data(_current.copyWith(updateFlags: flags));
   }
 
   void tryOpenDevMode() {

ui/flutter/lib/features/extensions/presentation/pages/extensions_page.dart

@@ -107,12 +107,6 @@ class _ExtensionsPageState extends ConsumerState<ExtensionsPage> {
       });
     }
     final stateAsync = ref.watch(extensionsControllerProvider);
-    ref.listen(extensionsControllerProvider, (previous, next) {
-      final failed = next.value?.updateCheckFailed ?? false;
-      if (failed && previous?.value?.updateCheckFailed != true) {
-        showAppToast(context, context.l10n.extensionUpdateCheckFailed);
-      }
-    });
     final body = Stack(
       children: [
         ColoredBox(

ui/flutter/lib/l10n/app_en.arb

@@ -120,7 +120,6 @@
     }
   },
   "extensionUpdateSuccess": "Updated successfully",
-  "extensionUpdateCheckFailed": "Failed to check for updates. Please check your network",
   "extensionDelete": "Delete Extension",
   "extensionAlreadyLatest": "It's already the latest version",
   "extensionFind": "Find Extensions",

ui/flutter/lib/l10n/app_zh.arb

@@ -106,7 +106,6 @@
   "extensionInstallSuccess": "安装成功",
   "extensionUpdateConfirm": "确定将“{name}”更新到最新版本吗？",
   "extensionUpdateSuccess": "更新成功",
-  "extensionUpdateCheckFailed": "检查更新失败，请检查网络后重试",
   "extensionDelete": "删除扩展",
   "extensionAlreadyLatest": "已经是最新版本",
   "extensionFind": "获取扩展",