style: 统一下拉与加载指示器

lib/pages/favorites/favorites_page.dart

@@ -176,8 +176,6 @@ class _FavoritesBody extends StatelessWidget {
         ],
         PagedListFooter(
           loading: favorites.loadingMore,
-          hasMore: favorites.hasMore,
-          hasItems: favorites.cards.isNotEmpty,
           errorMessage: favorites.loadMoreError == null
               ? null
               : errorText(l10n, favorites.loadMoreError, l10n.favoritesError),

lib/pages/following/following_paged_grid.dart

@@ -130,8 +130,6 @@ class FollowingPagedGrid extends StatelessWidget {
                   SliverToBoxAdapter(
                     child: PagedListFooter(
                       loading: loadingMore,
-                      hasMore: hasMore,
-                      hasItems: hasItems,
                       errorMessage: loadMoreError,
                       onRetry: onLoadMore,
                     ),

lib/pages/home/widgets/home_feed_grid.dart

@@ -218,8 +218,6 @@ class _HomeFeedGridState extends State<HomeFeedGrid> {
                       padding: const EdgeInsets.only(bottom: AppDimens.spaceXl),
                       child: PagedListFooter(
                         loading: widget.feedController.loadingMore,
-                        hasMore: widget.feedController.hasMore,
-                        hasItems: dramas.isNotEmpty,
                         errorMessage: widget.feedController.lastError == null
                             ? null
                             : l10n.catalogError,

lib/pages/new_releases/new_releases_page.dart

@@ -192,13 +192,9 @@ class _NewReleasesPageState extends State<NewReleasesPage> {
                                 ),
                                 PagedLoadFooter(
                                   loading: pager.loading,
-                                  hasMore: pager.hasMore,
-                                  hasItems: pager.items.isNotEmpty,
                                   loadMoreKey: const Key(
                                     'new-releases-load-more',
                                   ),
-                                  noMoreKey: const Key('new-releases-no-more'),
-                                  noMoreLabel: l10n.noMore,
                                 ),
                               ],
                       ),

lib/pages/notices/notices_page.dart

@@ -18,6 +18,8 @@ import '../../core/widgets/empty_state.dart';
 import '../../core/widgets/plain_page_scaffold.dart';
 import '../../l10n/app_localizations.dart';
 
+const double _loadMoreThreshold = 240;
+
 /// Anonymous system notice list with pagination and detail dialog.
 class NoticesPage extends StatefulWidget {
   const NoticesPage({super.key});
@@ -111,29 +113,55 @@ class _NoticesPageState extends State<NoticesPage> {
     }
     return AppPullToRefresh(
       onRefresh: _controller.refresh,
-      child: ListView.separated(
-        key: const Key('notices-list'),
-        physics: AppPullToRefresh.physics,
-        padding: const EdgeInsets.fromLTRB(16, 12, 16, 28),
-        itemCount: _controller.notices.length + 1,
-        separatorBuilder: (_, _) => const SizedBox(height: 10),
-        itemBuilder: (context, index) {
-          if (index == _controller.notices.length) return _footer(l10n);
-          final notice = _controller.notices[index];
-          return _NoticeTile(
-            notice: notice,
-            onTap: () => _showDetails(notice, l10n),
-          );
-        },
+      child: NotificationListener<ScrollNotification>(
+        onNotification: _onScroll,
+        child: ListView.separated(
+          key: const Key('notices-list'),
+          physics: AppPullToRefresh.physics,
+          padding: const EdgeInsets.fromLTRB(16, 12, 16, 28),
+          itemCount: _controller.notices.length + 1,
+          separatorBuilder: (_, _) => const SizedBox(height: 10),
+          itemBuilder: (context, index) {
+            if (index == _controller.notices.length) return _footer(l10n);
+            final notice = _controller.notices[index];
+            return _NoticeTile(
+              notice: notice,
+              onTap: () => _showDetails(notice, l10n),
+            );
+          },
+        ),
       ),
     );
   }
 
+  bool _onScroll(ScrollNotification notification) {
+    if (notification.depth != 0 ||
+        !_controller.hasMore ||
+        _controller.loadingMore) {
+      return false;
+    }
+    if (notification.metrics.extentAfter > _loadMoreThreshold) return false;
+    if (notification is ScrollUpdateNotification ||
+        notification is ScrollEndNotification ||
+        notification is OverscrollNotification) {
+      unawaited(_controller.loadMore());
+    }
+    return false;
+  }
+
   Widget _footer(AppLocalizations l10n) {
     if (_controller.loadingMore) {
-      return const Padding(
-        padding: EdgeInsets.symmetric(vertical: 12),
-        child: Center(child: CircularProgressIndicator()),
+      return const SizedBox(
+        height: AppDimens.loadMoreIndicatorHeight,
+        child: Center(
+          child: SizedBox.square(
+            dimension: AppDimens.refreshSpinnerSize,
+            child: CircularProgressIndicator(
+              strokeWidth: AppDimens.refreshSpinnerStroke,
+              color: AppColors.textPrimary,
+            ),
+          ),
+        ),
       );
     }
     if (_controller.loadMoreError != null) {
@@ -143,14 +171,7 @@ class _NoticesPageState extends State<NoticesPage> {
         label: Text(l10n.retry),
       );
     }
-    if (_controller.hasMore) {
-      return TextButton(
-        key: const Key('notices-load-more'),
-        onPressed: _controller.loadMore,
-        child: Text(l10n.loadMore),
-      );
-    }
-    return const SizedBox(height: 8);
+    return const SizedBox.shrink();
   }
 
   Future<void> _showDetails(AppNotice notice, AppLocalizations l10n) {

lib/pages/ranking/ranking_page.dart

@@ -153,11 +153,7 @@ class _RankingPageState extends State<RankingPage> {
                   ],
                   PagedLoadFooter(
                     loading: pager.loading,
-                    hasMore: pager.hasMore,
-                    hasItems: pager.items.isNotEmpty,
                     loadMoreKey: const Key('ranking-load-more'),
-                    noMoreKey: const Key('ranking-no-more'),
-                    noMoreLabel: l10n.noMore,
                   ),
                 ],
         ),

lib/pages/recommend/widgets/all_dramas_filter_grid.dart

@@ -115,8 +115,6 @@ class _AllDramasFilterGridState extends State<AllDramasFilterGrid> {
                           ),
                           child: PagedListFooter(
                             loading: widget.feedController.loadingMore,
-                            hasMore: widget.feedController.hasMore,
-                            hasItems: dramas.isNotEmpty,
                             errorMessage:
                                 widget.feedController.lastError == null
                                 ? null

lib/pages/watch_records/watch_records_page.dart

@@ -145,8 +145,6 @@ class _WatchRecordsBodyState extends State<_WatchRecordsBody> {
         ],
         PagedListFooter(
           loading: controller.loadingMore,
-          hasMore: controller.hasMore,
-          hasItems: controller.records.isNotEmpty,
           errorMessage: controller.loadMoreError == null
               ? null
               : errorText(l10n, controller.loadMoreError, l10n.progressError),