fix(home): 移除二级标签筛选按钮

docs/plans/PROGRESS.md

@@ -1222,3 +1222,9 @@ $ flutter test
 - 新增量化测试断言四行首项 x 均为 12、相邻 chip 间距均为 10；`flutter analyze` 无问题。
 - 修复横向 viewport 对短内容居中：滚动内容最小宽度撑满视口后由 Row.start 排列。
 - `flutter test test/recommend/all_dramas_filter_alignment_test.dart`：1 项测试通过。
+
+## 2026-10-22 首页二级标签移除筛选按钮
+
+- 首页二级标签行改为纯横向滑动，右侧三横线按钮不渲染也不占位。
+- 删除不再使用的筛选回调、尺寸 token、颜色和 CustomPainter；全部短剧页筛选按钮保持不变。
+- `flutter analyze`：No issues found。

lib/core/theme/app_colors.dart

@@ -92,7 +92,6 @@ abstract final class AppColors {
   static const textSecondary = Color(0xFF8E8E93);
   static const textTertiary = Color(0xFF9E9E9E);
   static const textTabInactive = Color(0xFFB0B0B0);
-  static const textFilterIcon = Color(0xFF7A7A7E);
 
   /// 原生开屏与冷启动过渡底色。
   static const splashInk = ink;

lib/core/theme/app_dimens.dart

@@ -114,10 +114,6 @@ abstract final class AppDimens {
   static const Duration homeSecondaryTagAnimationDuration = Duration(
     milliseconds: 150,
   );
-  static const double homeSecondaryFilterGap = 6;
-  static const double homeSecondaryFilterVisualSize = 26;
-  static const double homeSecondaryFilterIcon = 16;
-  static const double homeSecondaryFilterStroke = 1.7;
   static const double homePrimaryCategoryGap = 24;
   static const double homeSecondaryTagGap = 10;
   static const double homeSearchTopGap = 0;

lib/pages/home/home_view.dart

@@ -276,7 +276,6 @@ class _HomeTabsState extends State<_HomeTabs> {
         onSearch: () => _openSearch(context),
         onOpenVip: () => unawaited(_openVip(context)),
         onOpenWallet: () => unawaited(_openWallet(context)),
-        onOpenFilter: () => _pushPage(context, const FilterPage()),
       ),
       onOpenDrama: (drama) => unawaited(logic.playDrama(context, drama)),
     );

lib/pages/home/widgets/home_grid_header.dart

@@ -40,13 +40,11 @@ class HomeGridCallbacks {
     required this.onSearch,
     required this.onOpenVip,
     required this.onOpenWallet,
-    required this.onOpenFilter,
   });
 
   final VoidCallback onSearch;
   final VoidCallback onOpenVip;
   final VoidCallback onOpenWallet;
-  final VoidCallback onOpenFilter;
 }
 
 class HomeGridHeader extends StatelessWidget {
@@ -82,7 +80,7 @@ class HomeGridHeader extends StatelessWidget {
         _searchRow(l10n),
         _primaryRow(l10n),
         if (selectedPrimary == HomePrimaryTab.featured)
-          _tagRow(l10n)
+          _tagRow()
         else
           const SizedBox(height: AppDimens.homeSecondaryGridGap),
       ],
@@ -324,7 +322,7 @@ class HomeGridHeader extends StatelessWidget {
     );
   }
 
-  Widget _tagRow(AppLocalizations l10n) {
+  Widget _tagRow() {
     return Padding(
       padding: const EdgeInsets.fromLTRB(
         AppDimens.feedPageHorizontal,
@@ -332,54 +330,19 @@ class HomeGridHeader extends StatelessWidget {
         AppDimens.feedPageHorizontal,
         AppDimens.homeSecondaryGridGap,
       ),
-      child: Row(
-        crossAxisAlignment: CrossAxisAlignment.center,
-        mainAxisAlignment: MainAxisAlignment.start,
-        children: [
-          Expanded(
-            child: SingleChildScrollView(
-              key: const Key('home-secondary-tags'),
-              scrollDirection: Axis.horizontal,
-              child: Row(
-                crossAxisAlignment: CrossAxisAlignment.center,
-                mainAxisAlignment: MainAxisAlignment.start,
-                children: [
-                  for (final tag in tags) ...[
-                    _tagChip(tag),
-                    const SizedBox(width: AppDimens.homeSecondaryTagGap),
-                  ],
-                ],
-              ),
-            ),
-          ),
-          const SizedBox(width: AppDimens.homeSecondaryFilterGap),
-          Tooltip(
-            message: l10n.filter,
-            child: SizedBox.square(
-              dimension: AppDimens.homeSecondaryFilterVisualSize,
-              child: Material(
-                color: AppColors.transparent,
-                child: InkWell(
-                  key: const Key('home-grid-filter'),
-                  onTap: callbacks.onOpenFilter,
-                  child: Center(
-                    child: SizedBox.square(
-                      key: const Key('home-secondary-filter-visual'),
-                      dimension: AppDimens.homeSecondaryFilterVisualSize,
-                      child: const Center(
-                        child: CustomPaint(
-                          key: Key('home-secondary-filter-icon'),
-                          size: Size.square(AppDimens.homeSecondaryFilterIcon),
-                          painter: _ThreeLineFilterPainter(),
-                        ),
-                      ),
-                    ),
-                  ),
-                ),
-              ),
-            ),
-          ),
-        ],
+      child: SingleChildScrollView(
+        key: const Key('home-secondary-tags'),
+        scrollDirection: Axis.horizontal,
+        child: Row(
+          crossAxisAlignment: CrossAxisAlignment.center,
+          mainAxisAlignment: MainAxisAlignment.start,
+          children: [
+            for (final tag in tags) ...[
+              _tagChip(tag),
+              const SizedBox(width: AppDimens.homeSecondaryTagGap),
+            ],
+          ],
+        ),
       ),
     );
   }
@@ -417,26 +380,3 @@ class HomeGridHeader extends StatelessWidget {
     );
   }
 }
-
-class _ThreeLineFilterPainter extends CustomPainter {
-  const _ThreeLineFilterPainter();
-
-  @override
-  void paint(Canvas canvas, Size size) {
-    final paint = Paint()
-      ..color = AppColors.textFilterIcon
-      ..strokeWidth = AppDimens.homeSecondaryFilterStroke
-      ..strokeCap = StrokeCap.butt;
-    final positions = [
-      size.height * 0.25,
-      size.height * 0.5,
-      size.height * 0.75,
-    ];
-    for (final y in positions) {
-      canvas.drawLine(Offset(0, y), Offset(size.width, y), paint);
-    }
-  }
-
-  @override
-  bool shouldRepaint(_ThreeLineFilterPainter oldDelegate) => false;
-}

test/home/home_preview_layout_test.dart

@@ -94,43 +94,21 @@ void main() {
     expect(find.byKey(const Key('home-section-category-古装')), findsOneWidget);
     expect(find.byKey(const Key('home-section-category-社群')), findsOneWidget);
     expect(find.byKey(const Key('home-secondary-tags')), findsOneWidget);
-    expect(find.byKey(const Key('home-grid-filter')), findsOneWidget);
     expect(
-      tester.getSize(find.byKey(const Key('home-grid-filter'))),
-      const Size.square(AppDimens.homeSecondaryFilterVisualSize),
+      tester.getRect(find.byKey(const Key('home-secondary-tags'))).left,
+      closeTo(AppDimens.feedPageHorizontal, 0.1),
     );
     expect(
-      tester.getSize(find.byKey(const Key('home-secondary-filter-visual'))),
-      const Size.square(AppDimens.homeSecondaryFilterVisualSize),
-    );
-    expect(
-      tester.getCenter(find.byKey(const Key('home-grid-filter'))).dy,
-      closeTo(tester.getCenter(find.byKey(const Key('home-tag-hot'))).dy, 0.1),
-    );
-    expect(
-      tester.getRect(find.byKey(const Key('home-grid-filter'))).right,
+      tester.getRect(find.byKey(const Key('home-secondary-tags'))).right,
       closeTo(
         tester.getRect(find.byKey(const Key('home-grid'))).right -
             AppDimens.feedPageHorizontal,
         0.1,
       ),
     );
-    final filterIcon = tester.widget<CustomPaint>(
-      find.byKey(const Key('home-secondary-filter-icon')),
-    );
-    expect(
-      filterIcon.size,
-      const Size.square(AppDimens.homeSecondaryFilterIcon),
-    );
-    final filterMaterial = tester.widget<Material>(
-      find
-          .ancestor(
-            of: find.byKey(const Key('home-grid-filter')),
-            matching: find.byType(Material),
-          )
-          .first,
-    );
-    expect(filterMaterial.color, AppColors.transparent);
+    expect(find.byKey(const Key('home-grid-filter')), findsNothing);
+    expect(find.byKey(const Key('home-secondary-filter-visual')), findsNothing);
+    expect(find.byKey(const Key('home-secondary-filter-icon')), findsNothing);
     final searchBox = find.descendant(
       of: find.byKey(const Key('home-search-entry')),
       matching: find.byType(Container),