fix(following): 支持未登录追剧与历史

lib/core/data/services/watch_records_controller.dart

@@ -314,6 +314,23 @@ class WatchRecordsController extends ChangeNotifier {
     if (!_disposed) notifyListeners();
   }
 
+  /// 切换账号/设备身份时清除内存数据，不删除服务端记录。
+  void reset() {
+    _requestSeq += 1;
+    records = const [];
+    total = 0;
+    loading = false;
+    loadingMore = false;
+    hasMore = false;
+    clearing = false;
+    error = null;
+    loadMoreError = null;
+    actionError = null;
+    lastErrorCode = null;
+    _pageIndex = 0;
+    _notify();
+  }
+
   @override
   void dispose() {
     _disposed = true;

lib/pages/following/following_page.dart

@@ -15,7 +15,6 @@ import '../../core/data/services/watch_records_controller.dart';
 import '../../core/formatting/error_text.dart';
 import '../../core/theme/app_colors.dart';
 import '../../core/theme/app_dimens.dart';
-import '../../core/widgets/auth_gate.dart';
 import '../../core/widgets/empty_state.dart';
 import '../../l10n/app_localizations.dart';
 import '../player/open_player.dart';
@@ -67,7 +66,7 @@ class _FollowingPageState extends State<FollowingPage> {
       history: context.read<WatchHistoryRepository>(),
       catalog: context.read<CatalogRepository>(),
     );
-    if (_wasSignedIn) unawaited(_history.load());
+    unawaited(_history.load());
     WidgetsBinding.instance.addPostFrameCallback((_) {
       if (mounted) unawaited(widget.favoriteController.load());
     });
@@ -75,8 +74,16 @@ class _FollowingPageState extends State<FollowingPage> {
 
   void _onAuthChanged() {
     final signedIn = _auth.isSignedIn;
-    if (signedIn && !_wasSignedIn) unawaited(_history.load());
+    if (signedIn == _wasSignedIn) return;
     _wasSignedIn = signedIn;
+    _leaveEditing();
+    _history.reset();
+    widget.favoriteController.clear();
+    unawaited(_reloadForIdentity());
+  }
+
+  Future<void> _reloadForIdentity() async {
+    await Future.wait([_history.load(), widget.favoriteController.load()]);
   }
 
   @override
@@ -104,7 +111,6 @@ class _FollowingPageState extends State<FollowingPage> {
   @override
   Widget build(BuildContext context) {
     final l10n = AppLocalizations.of(context)!;
-    final signedIn = context.watch<AuthController>().isSignedIn;
     return ColoredBox(
       key: const Key('following-page'),
       color: AppColors.appBackground,
@@ -114,47 +120,44 @@ class _FollowingPageState extends State<FollowingPage> {
           children: [
             _header(l10n),
             Expanded(
-              child: !signedIn
-                  ? const AuthGatePanel()
-                  : PageView(
-                      key: const Key('following-tab-pages'),
-                      controller: _pageController,
-                      onPageChanged: _onPageChanged,
-                      children: [
-                        FollowingKeepAliveTab(
-                          child: FollowingFavoritesGrid(
-                            controller: widget.favoriteController,
-                            selection: FollowingFavoriteSelection(
-                              editing: _editing,
-                              selected: _selected,
-                              onToggle: _toggleDrama,
-                            ),
-                            scrollController: _favoriteScroll,
-                            onGoHome: widget.onGoHome,
-                          ),
-                        ),
-                        FollowingKeepAliveTab(
-                          child: _HistoryList(
-                            controller: _history,
-                            editing: _editing,
-                            scrollController: _historyScroll,
-                            onListEmptied: _exitEditingIfEmpty,
-                          ),
-                        ),
-                      ],
+              child: PageView(
+                key: const Key('following-tab-pages'),
+                controller: _pageController,
+                onPageChanged: _onPageChanged,
+                children: [
+                  FollowingKeepAliveTab(
+                    child: FollowingFavoritesGrid(
+                      controller: widget.favoriteController,
+                      selection: FollowingFavoriteSelection(
+                        editing: _editing,
+                        selected: _selected,
+                        onToggle: _toggleDrama,
+                      ),
+                      scrollController: _favoriteScroll,
+                      onGoHome: widget.onGoHome,
                     ),
-            ),
-            if (signedIn)
-              FollowingEditSlot(
-                tab: _tab,
-                editing: _editing,
-                favorites: widget.favoriteController,
-                selected: _selected,
-                actions: FollowingEditActions(
-                  onToggleAll: _toggleAll,
-                  onRemove: () => unawaited(_cancelSelected()),
-                ),
+                  ),
+                  FollowingKeepAliveTab(
+                    child: _HistoryList(
+                      controller: _history,
+                      editing: _editing,
+                      scrollController: _historyScroll,
+                      onListEmptied: _exitEditingIfEmpty,
+                    ),
+                  ),
+                ],
               ),
+            ),
+            FollowingEditSlot(
+              tab: _tab,
+              editing: _editing,
+              favorites: widget.favoriteController,
+              selected: _selected,
+              actions: FollowingEditActions(
+                onToggleAll: _toggleAll,
+                onRemove: () => unawaited(_cancelSelected()),
+              ),
+            ),
           ],
         ),
       ),
@@ -297,7 +300,7 @@ class _FollowingPageState extends State<FollowingPage> {
     final tab = FollowingTab.values[index];
     _leaveEditing();
     _tab.value = tab;
-    if (tab == FollowingTab.history && _auth.isSignedIn) {
+    if (tab == FollowingTab.history) {
       unawaited(_history.load());
     }
   }

lib/pages/watch_records/watch_records_page.dart

@@ -15,7 +15,6 @@ import '../../core/platform/haptics.dart';
 import '../../core/theme/app_colors.dart';
 import '../../core/theme/app_theme.dart';
 import '../../core/widgets/app_pull_to_refresh.dart';
-import '../../core/widgets/auth_gate.dart';
 import '../../core/widgets/empty_state.dart';
 import '../../core/widgets/paged_list_footer.dart';
 import '../../core/widgets/subpage_header.dart';
@@ -86,6 +85,7 @@ class _WatchRecordsBodyState extends State<_WatchRecordsBody> {
     final signedIn = _auth.isSignedIn;
     if (_signedIn == signedIn || !mounted) return;
     _signedIn = signedIn;
+    controller.reset();
     unawaited(controller.load());
   }
 
@@ -106,9 +106,6 @@ class _WatchRecordsBodyState extends State<_WatchRecordsBody> {
 
   Widget _content(BuildContext context) {
     final l10n = AppLocalizations.of(context)!;
-    if (controller.lastErrorCode == 200007) {
-      return const AuthGatePanel();
-    }
     if (controller.loading && controller.records.isEmpty) {
       return const Center(
         child: CircularProgressIndicator(key: Key('watch-records-loading')),