ui细节优化

lib/views/discover_page.dart

@@ -6,6 +6,7 @@ import 'active/active_search_page.dart';
 import 'active/category_page.dart';
 import 'active/popular_page.dart';
 import 'active/rate.dart';
+import '../controllers/shared_preferences_storage_controller.dart';
 
 /// 时间: 2025-03-21
 /// 功能: 发现页面
@@ -21,26 +22,52 @@ class DiscoverPage extends StatefulWidget {
 
 class _DiscoverPageState extends State<DiscoverPage>
     with SingleTickerProviderStateMixin {
-  late TabController _tabController;
-  final List<String> _categories = ['热门', '分类', '搜索', '活跃'];
+  TabController? _tabController;
+  List<String> _categories = ['分类', '热门', '搜索'];
   bool _showTips = true;
+  bool _isDeveloperMode = false;
+  bool _isInitialized = false;
   OverlayEntry? _infoOverlayEntry;
 
   @override
   void initState() {
     super.initState();
-    _tabController = TabController(length: _categories.length, vsync: this);
-    // 添加标签切换监听，以便更新UI
-    _tabController.addListener(() {
-      _removeInfoOverlay();
-      setState(() {});
+    _loadDeveloperMode();
+  }
+
+  Future<void> _loadDeveloperMode() async {
+    final isEnabled = await SharedPreferencesStorageController.getBool(
+      'developer_mode_enabled',
+      defaultValue: false,
+    );
+    if (mounted) {
+      setState(() {
+        _isDeveloperMode = isEnabled;
+        _updateCategories();
+      });
+    }
+  }
+
+  void _updateCategories() {
+    setState(() {
+      _categories = ['分类', '热门', '搜索'];
+      if (_isDeveloperMode) {
+        _categories.add('活跃');
+      }
+      _tabController?.dispose();
+      _tabController = TabController(length: _categories.length, vsync: this);
+      _tabController!.addListener(() {
+        _removeInfoOverlay();
+        setState(() {});
+      });
+      _isInitialized = true;
     });
   }
 
   @override
   void dispose() {
     _removeInfoOverlay();
-    _tabController.dispose();
+    _tabController?.dispose();
     super.dispose();
   }
 
@@ -51,12 +78,16 @@ class _DiscoverPageState extends State<DiscoverPage>
 
   @override
   Widget build(BuildContext context) {
-    final isHotTab = _categories[_tabController.index] == '热门';
+    if (!_isInitialized) {
+      return const Scaffold(body: Center(child: CircularProgressIndicator()));
+    }
+
+    final isHotTab = _categories[_tabController!.index] == '热门';
 
     return Scaffold(
       appBar: TabbedNavAppBar.build(
         title: '发现',
-        tabController: _tabController,
+        tabController: _tabController!,
         tabLabels: _categories,
         leading: isHotTab ? _buildInfoButton(context) : null,
         actions: [
@@ -66,7 +97,7 @@ class _DiscoverPageState extends State<DiscoverPage>
       body: Column(
         children: [
           // 只有非搜索标签时才显示话题chips
-          if (_categories[_tabController.index] != '搜索' && _showTips)
+          if (_categories[_tabController!.index] != '搜索' && _showTips)
             _buildTopicChips(),
           Expanded(
             child: NotificationListener<ScrollNotification>(
@@ -77,14 +108,10 @@ class _DiscoverPageState extends State<DiscoverPage>
                 return false;
               },
               child: TabBarView(
-                controller: _tabController,
+                controller: _tabController!,
                 children: _categories.asMap().entries.map((entry) {
                   final category = entry.value;
-                  // 搜索标签显示 ActiveSearchPage
-                  if (category == '搜索') {
-                    return const ActiveSearchPage();
-                  }
-                  // 分类标签跳转到分类页面
+                  // 分类标签显示分类页面
                   if (category == '分类') {
                     return const CategoryPage();
                   }
@@ -92,6 +119,10 @@ class _DiscoverPageState extends State<DiscoverPage>
                   if (category == '热门') {
                     return const PopularPage();
                   }
+                  // 搜索标签显示 ActiveSearchPage
+                  if (category == '搜索') {
+                    return const ActiveSearchPage();
+                  }
                   // 活跃标签显示活跃统计页面
                   if (category == '活跃') {
                     return const RatePage();
@@ -283,9 +314,11 @@ class _DiscoverPageState extends State<DiscoverPage>
 
   Future<void> _refreshContent() async {
     await Future.delayed(const Duration(seconds: 1));
-    ScaffoldMessenger.of(
-      context,
-    ).showSnackBar(const SnackBar(content: Text('内容已刷新')));
+    if (mounted) {
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(const SnackBar(content: Text('内容已刷新')));
+    }
   }
 
   void _showSearch() {