fix(home): 收紧首页顶部区间距

docs/plans/PROGRESS.md

@@ -1113,5 +1113,6 @@ $ flutter test
 
 - 一级分类改为页内切换 6 个列表，未选 16/w400 灰字、选中 20/w700 白字，无下划线；二级 chips 仅精选显示。
 - 四类短剧卡片移除底板/描边，封面统一 8 圆角，网格行距 10、封底到标题 6，题材移至右上角异形丝带。
+- 首页搜索栏到一级、一级到二级、二级到网格间距为 8/8/10；非精选 tab 直接以 10 衔接网格。
 - 播放量统一 spark 图标与 `w` 格式，整数无小数；首页、剧单、全部短剧、追剧共用。
 - 全部短剧的地区、字幕、配音筛选 UI 已占位；以下接口待补：地区、字幕/配音筛选数据。

lib/core/theme/app_dimens.dart

@@ -112,6 +112,10 @@ abstract final class AppDimens {
   static const double homeSecondaryTagFont = 13;
   static const double homePrimaryCategoryGap = 24;
   static const double homeSecondaryTagGap = 18;
+  static const double homeSearchTopGap = 0;
+  static const double homeSearchPrimaryGap = 8;
+  static const double homePrimarySecondaryGap = 8;
+  static const double homeSecondaryGridGap = 10;
   static const double homeIconSlot = 44;
   static const double homeHeaderIcon = 22;
 

lib/pages/home/widgets/home_grid_header.dart

@@ -81,7 +81,10 @@ class HomeGridHeader extends StatelessWidget {
       children: [
         _searchRow(l10n),
         _primaryRow(l10n),
-        if (selectedPrimary == HomePrimaryTab.featured) _tagRow(l10n),
+        if (selectedPrimary == HomePrimaryTab.featured)
+          _tagRow(l10n)
+        else
+          const SizedBox(height: AppDimens.homeSecondaryGridGap),
       ],
     );
   }
@@ -90,9 +93,9 @@ class HomeGridHeader extends StatelessWidget {
     return Padding(
       padding: const EdgeInsets.fromLTRB(
         AppDimens.feedPageHorizontal,
-        AppDimens.spaceSm,
+        AppDimens.homeSearchTopGap,
         AppDimens.feedPageHorizontal,
-        AppDimens.spaceSm,
+        AppDimens.homeSearchPrimaryGap,
       ),
       child: Row(
         crossAxisAlignment: CrossAxisAlignment.start,
@@ -302,9 +305,9 @@ class HomeGridHeader extends StatelessWidget {
     return Padding(
       padding: const EdgeInsets.fromLTRB(
         AppDimens.feedPageHorizontal,
-        AppDimens.spaceMd,
+        AppDimens.homePrimarySecondaryGap,
         AppDimens.feedPageHorizontal,
-        AppDimens.spaceSm,
+        AppDimens.homeSecondaryGridGap,
       ),
       child: Row(
         crossAxisAlignment: CrossAxisAlignment.start,