test: 按新 UI 基线重写过期用例

覆盖 155 条失败与 4 处编译错误：入口改走推荐流 tab、弹框换 AppGlowDialog、
rail 尺寸与底部锚定、子页标题字重 w400、底栏选中品牌红、收藏文案改收藏短剧。
全量 flutter test 775 通过。

test/core/subpage_header_test.dart

@@ -27,11 +27,11 @@ void main() {
     );
     final title = tester.widget<Text>(find.byKey(const Key('subpage-title')));
     expect(title.style?.fontSize, 18);
-    expect(title.style?.fontWeight, FontWeight.w800);
+    expect(title.style?.fontWeight, FontWeight.w400);
     expect(title.style?.color, AppColors.textPrimary);
     final back = tester.getRect(find.byKey(const Key('sample-back')));
     final titleRect = tester.getRect(find.byKey(const Key('subpage-title')));
-    expect(titleRect.left - back.right, closeTo(12, 0.5));
+    expect(titleRect.left - back.right, closeTo(6, 0.5));
     final surface = tester.widget<Material>(
       find.descendant(
         of: find.byKey(const Key('sample-back')),