重构

lib/views/discover_page.dart

@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 import '../constants/app_constants.dart';
 import '../utils/responsive_layout.dart';
-import '../utils/flutter_compatibility_fix.dart';
 import '../widgets/tabbed_nav_app_bar.dart';
 import 'active/active_search_page.dart';
 import 'active/category_page.dart';
@@ -80,7 +79,6 @@ class _DiscoverPageState extends State<DiscoverPage>
               child: TabBarView(
                 controller: _tabController,
                 children: _categories.asMap().entries.map((entry) {
-                  final index = entry.key;
                   final category = entry.value;
                   // 搜索标签显示 ActiveSearchPage
                   if (category == '搜索') {