up

app/lib/screens/home/home_shell.dart

@@ -1,21 +1,44 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import '../../core/theme/app_theme.dart';
+import '../../providers/feed_provider.dart';
+import '../../screens/category/category_screen.dart';
 import '../../screens/feed/feed_screen.dart';
+import '../../screens/notification/notifications_screen.dart';
 import '../../screens/profile/mine_screen.dart';
+import '../../screens/upload/upload_screen.dart';
 
 /// 首页壳：底部 Tab（首页/分类/发布/消息/我的），02-技术文档信息架构
-/// 首页 Tab 为 Feed 播放页，我的页已接入，其余 Tab 随迭代接入；IndexedStack 保活各 Tab 状态
-class HomeShell extends StatefulWidget {
+/// IndexedStack 保活各 Tab 状态（Feed 播放器池 / 分类滚动位置 / 上传流程不被销毁）
+class HomeShell extends ConsumerStatefulWidget {
   const HomeShell({super.key});
 
   @override
-  State<HomeShell> createState() => _HomeShellState();
+  ConsumerState<HomeShell> createState() => _HomeShellState();
 }
 
-class _HomeShellState extends State<HomeShell> {
+class _HomeShellState extends ConsumerState<HomeShell> {
   int _index = 0;
 
+  /// Feed 三种策略的 provider keys（切 Tab 时用于暂停/恢复播放器池）
+  static const _feedStrategies = FeedStrategy.values;
+
+  void _onTabSelected(int i) {
+    if (i == _index) return;
+    // 切到非首页：暂停所有 Feed 策略的播放器池（IndexedStack 保活，否则声音会继续）
+    if (i != 0) {
+      for (final s in _feedStrategies) {
+        ref.read(feedProvider(s).notifier).pool.pauseCurrent();
+      }
+    }
+    setState(() => _index = i);
+    // 切回首页：恢复当前策略播放（FeedScreen 内部 _strategy 是 recommend）
+    if (i == 0) {
+      ref.read(feedProvider(FeedStrategy.recommend).notifier).pool.playCurrent();
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -23,9 +46,9 @@ class _HomeShellState extends State<HomeShell> {
         index: _index,
         children: const [
           FeedScreen(),
-          _TabPlaceholder('分类'),
-          _TabPlaceholder('发布'),
-          _TabPlaceholder('消息'),
+          CategoryScreen(),
+          UploadScreen(),
+          NotificationsScreen(),
           MineScreen(),
         ],
       ),
@@ -33,7 +56,7 @@ class _HomeShellState extends State<HomeShell> {
         backgroundColor: AppColors.surface,
         indicatorColor: AppColors.primary.withValues(alpha: 0.2),
         selectedIndex: _index,
-        onDestinationSelected: (i) => setState(() => _index = i),
+        onDestinationSelected: _onTabSelected,
         destinations: const [
           NavigationDestination(
             icon: Icon(Icons.home_outlined),
@@ -61,20 +84,3 @@ class _HomeShellState extends State<HomeShell> {
     );
   }
 }
-
-/// Tab 占位（迭代期）
-class _TabPlaceholder extends StatelessWidget {
-  const _TabPlaceholder(this.title);
-
-  final String title;
-
-  @override
-  Widget build(BuildContext context) {
-    return Center(
-      child: Text(
-        '$title（随迭代接入）',
-        style: const TextStyle(color: AppColors.textSecondary, fontSize: 15),
-      ),
-    );
-  }
-}