feat: 首页，播放页，搜索页，收藏UI

lib/main/main_root.dart

@@ -23,6 +23,7 @@ class _MainRootState extends State<MainRoot> {
     MinePage(),
   ];
 
+  final _pageController = PageController();
   final List<_TabBarItem> _items = const [
     _TabBarItem(
       selectedIcon: ConstImg.tabHomeSelected,
@@ -52,7 +53,12 @@ class _MainRootState extends State<MainRoot> {
   Widget build(BuildContext context) {
     return Scaffold(
       extendBody: true,
-      body: IndexedStack(index: _currentIndex, children: _pages),
+      // body: IndexedStack(index: _currentIndex, children: _pages),
+      body: PageView(
+        physics: const NeverScrollableScrollPhysics(),
+        controller: _pageController,
+        children: _pages,
+      ),
       bottomNavigationBar: SafeArea(
         top: false,
         minimum: EdgeInsets.only(bottom: 10.h),
@@ -113,7 +119,7 @@ class _MainRootState extends State<MainRoot> {
     if (_currentIndex == index) {
       return;
     }
-
+    _pageController.jumpToPage(index);
     setState(() {
       _currentIndex = index;
     });