feat(flutter): 精简首页标题并重做空态视觉

lib/pages/discover/discover_view.dart

@@ -144,24 +144,8 @@ class _DiscoverPageState extends State<DiscoverPage> {
       ),
       SliverToBoxAdapter(
         child: Padding(
-          padding: const EdgeInsets.fromLTRB(16, 18, 16, 12),
-          child: Column(
-            crossAxisAlignment: CrossAxisAlignment.start,
-            children: [
-              _categories(l10n, categories),
-              const SizedBox(height: 18),
-              Text(
-                l10n.allDramas,
-                key: const Key('home-all-dramas-title'),
-                style: const TextStyle(
-                  color: AppColors.onPrimary,
-                  fontSize: 18,
-                  fontWeight: FontWeight.w700,
-                  height: 1.2,
-                ),
-              ),
-            ],
-          ),
+          padding: const EdgeInsets.fromLTRB(16, 18, 16, 14),
+          child: _categories(l10n, categories),
         ),
       ),
       _HomeDramaGrid(
@@ -277,6 +261,7 @@ class _DiscoverPageState extends State<DiscoverPage> {
         (code: 'category-${category.id}', label: category.name),
     ];
     return SizedBox(
+      key: const Key('home-category-chips'),
       height: 32,
       child: ListView.separated(
         scrollDirection: Axis.horizontal,