style(app): 格式化并拆分长函数

lib/pages/discover/discover_binding.dart

@@ -1,4 +1,4 @@
-// Author: fruit.com.cn
+// Author: fruit.com.cn
 
 import '../../core/data/models/drama.dart';
 import '../../core/data/repositories/search_repository.dart';
@@ -10,9 +10,5 @@ class DiscoverBinding {
     required Drama drama,
     required WatchHistoryRepository history,
     SearchRepository? search,
-  }) => DiscoverLogic(
-    drama: drama,
-    history: history,
-    searchRepository: search,
-  );
+  }) => DiscoverLogic(drama: drama, history: history, searchRepository: search);
 }

lib/pages/discover/discover_logic.dart

@@ -134,7 +134,8 @@ class DiscoverLogic extends ChangeNotifier {
 
   void _scheduleSearch(String query) {
     final alreadyRequested = query == _lastRequestedQuery;
-    if (alreadyRequested && (searchLoading || searchResults.isNotEmpty || searchError != null)) {
+    if (alreadyRequested &&
+        (searchLoading || searchResults.isNotEmpty || searchError != null)) {
       return;
     }
     _lastRequestedQuery = query;

lib/pages/discover/discover_view.dart

@@ -181,7 +181,8 @@ class _DiscoverPageState extends State<DiscoverPage> {
             padding: const EdgeInsets.fromLTRB(0, 0, 0, 12),
             child: _languages(l10n, allDramas),
           ),
-        ),        if (logic.resumeRecord != null && logic.resumeDrama(allDramas) != null)
+        ),
+        if (logic.resumeRecord != null && logic.resumeDrama(allDramas) != null)
           SliverToBoxAdapter(
             child: Padding(
               padding: const EdgeInsets.fromLTRB(16, 0, 16, 14),
@@ -495,6 +496,7 @@ class _DiscoverPageState extends State<DiscoverPage> {
     if (code == 'en') return l10n.languageEnglish;
     return code;
   }
+
   Widget _continueCard(
     AppLocalizations l10n,
     Drama drama,

lib/pages/discover/widgets/home_drama_grid.dart

@@ -25,24 +25,40 @@ class _HomeDramaGrid extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final loading = _loadingState();
+    if (loading != null) return loading;
+    final search = _searchState();
+    if (search != null) return search;
+    if (dramas.isEmpty) return _emptyState();
+    return SliverMainAxisGroup(
+      slivers: [
+        SliverToBoxAdapter(child: _masonry(dramas)),
+        const SliverToBoxAdapter(child: SizedBox(height: 24)),
+      ],
+    );
+  }
+
+  Widget? _loadingState() {
     if (categories.loading && categories.feed.sections.isEmpty) {
       return const SliverFillRemaining(
         hasScrollBody: false,
         child: Center(child: CircularProgressIndicator(strokeWidth: 2)),
       );
     }
-    if (categories.error != null) {
-      return _fill(
-        EmptyState(
-          key: const Key('home-categories-error'),
-          icon: Icons.cloud_off_rounded,
-          title: l10n.categoriesError,
-          subtitle: l10n.emptyHint,
-          actionLabel: l10n.retry,
-          onAction: categories.load,
-        ),
-      );
-    }
+    if (categories.error == null) return null;
+    return _fill(
+      EmptyState(
+        key: const Key('home-categories-error'),
+        icon: Icons.cloud_off_rounded,
+        title: l10n.categoriesError,
+        subtitle: l10n.emptyHint,
+        actionLabel: l10n.retry,
+        onAction: categories.load,
+      ),
+    );
+  }
+
+  Widget? _searchState() {
     if (searching && searchLoading) {
       return const SliverFillRemaining(
         hasScrollBody: false,
@@ -54,39 +70,33 @@ class _HomeDramaGrid extends StatelessWidget {
         ),
       );
     }
-    if (searching && searchError != null) {
-      return _fill(
-        EmptyState(
-          key: const Key('discover-search-error'),
-          icon: Icons.cloud_off_rounded,
-          title: errorText(l10n, searchError, l10n.searchFailed),
-          actionLabel: l10n.retry,
-          actionKey: const Key('discover-search-retry'),
-          onAction: onRetrySearch,
-        ),
-      );
-    }
-    if (dramas.isEmpty) {
-      return _fill(
-        EmptyState(
-          key: const Key('home-all-dramas-empty'),
-          icon: searching
-              ? Icons.search_off_rounded
-              : Icons.movie_filter_outlined,
-          title: searching
-              ? l10n.noSearchResults
-              : categories.selectedSectionMissing
-              ? l10n.noCategoryDramas
-              : l10n.noSearchResults,
-          subtitle: l10n.emptyHint,
-        ),
-      );
-    }
-    return SliverMainAxisGroup(
-      slivers: [
-        SliverToBoxAdapter(child: _masonry(dramas)),
-        const SliverToBoxAdapter(child: SizedBox(height: 24)),
-      ],
+    if (!searching || searchError == null) return null;
+    return _fill(
+      EmptyState(
+        key: const Key('discover-search-error'),
+        icon: Icons.cloud_off_rounded,
+        title: errorText(l10n, searchError, l10n.searchFailed),
+        actionLabel: l10n.retry,
+        actionKey: const Key('discover-search-retry'),
+        onAction: onRetrySearch,
+      ),
+    );
+  }
+
+  Widget _emptyState() {
+    return _fill(
+      EmptyState(
+        key: const Key('home-all-dramas-empty'),
+        icon: searching
+            ? Icons.search_off_rounded
+            : Icons.movie_filter_outlined,
+        title: searching
+            ? l10n.noSearchResults
+            : categories.selectedSectionMissing
+            ? l10n.noCategoryDramas
+            : l10n.noSearchResults,
+        subtitle: l10n.emptyHint,
+      ),
     );
   }