fix:底部导航栏和滑动的冲突

lib/pages/book/book_tab_page.dart

@@ -28,6 +28,7 @@ class _BookTabPageState extends State<BookTabPage> {
   late ScrollController _scrollController;
   AppProvider? _provider;
   int _lastScrollSignal = 0;
+  int _prevBookCount = -1;
 
   static const _statusMap = {0: 'read', 1: 'reading', 2: 'want_to_read'};
 
@@ -63,8 +64,13 @@ class _BookTabPageState extends State<BookTabPage> {
       }
     }
 
-    // 数据变化时刷新列表（排序/评分/新增等）
-    _loadFirst();
+    // 仅在数据实际变化时刷新列表，避免底部导航栏显隐等UI变化误触发重载
+    final statusChanged = provider.bookStatusIndex != _lastStatusIndex;
+    final countChanged = provider.books.length != _prevBookCount;
+    if (statusChanged || countChanged) {
+      _prevBookCount = provider.books.length;
+      _loadFirst();
+    }
   }
 
   void _onScroll() {

lib/pages/movies/movie_tab_page.dart

@@ -27,6 +27,8 @@ class _MovieTabPageState extends State<MovieTabPage> {
   late ScrollController _scrollController;
   AppProvider? _provider;
   int _lastScrollSignal = 0;
+  int _prevMovieCount = -1;
+  int _prevLayoutStyle = -1;
 
   static const _statusMap = {0: 'watched', 1: 'watching', 2: 'want_to_watch'};
 
@@ -61,8 +63,15 @@ class _MovieTabPageState extends State<MovieTabPage> {
       }
     }
 
-    // 数据变化时刷新列表（排序/评分/新增等）
-    _loadFirst();
+    // 仅在数据或布局实际变化时刷新列表，避免底部导航栏显隐等UI变化误触发重载
+    final statusChanged = provider.movieStatusIndex != _lastStatusIndex;
+    final layoutChanged = provider.movieLayoutStyle != _prevLayoutStyle;
+    final countChanged = provider.movies.length != _prevMovieCount;
+    if (statusChanged || layoutChanged || countChanged) {
+      _prevLayoutStyle = provider.movieLayoutStyle;
+      _prevMovieCount = provider.movies.length;
+      _loadFirst();
+    }
   }
 
   void _onScroll() {

lib/pages/note/note_tab_page.dart

@@ -25,6 +25,7 @@ class _NoteTabPageState extends State<NoteTabPage> {
   int _layoutStyle = 0;
   bool _initialized = false;
   int _lastScrollSignal = 0;
+  int _prevNoteCount = -1;
 
   @override
   void initState() {
@@ -57,8 +58,12 @@ class _NoteTabPageState extends State<NoteTabPage> {
       }
     }
 
-    // 数据变化时刷新列表（排序/评分/新增等）
-    _loadFirst();
+    // 仅在数据实际变化时刷新列表，避免底部导航栏显隐等UI变化误触发重载
+    final countChanged = provider.notes.length != _prevNoteCount;
+    if (countChanged) {
+      _prevNoteCount = provider.notes.length;
+      _loadFirst();
+    }
   }
 
   void _onScroll() {

lib/utils/user_prefs.dart

@@ -135,7 +135,7 @@ class UserPrefs {
   bool get showSidebarTags => prefs.getBool('showSidebarTags') ?? true;
   Future<bool> setShowSidebarTags(bool value) => prefs.setBool('showSidebarTags', value);
 
-  bool get showSidebarMdReader => prefs.getBool('showSidebarMdReader') ?? true;
+  bool get showSidebarMdReader => prefs.getBool('showSidebarMdReader') ?? false;
   Future<bool> setShowSidebarMdReader(bool value) => prefs.setBool('showSidebarMdReader', value);
 
   bool get showSidebarEpub => prefs.getBool('showSidebarEpub') ?? true;