优化代码，删除无用代码

lib/pages/epub_reader/epub_detail_page.dart

@@ -359,17 +359,6 @@ class _EpubDetailPageState extends State<EpubDetailPage> {
     );
   }
 
-  Widget _buildTag(String label, ColorScheme colors) {
-    return Container(
-      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
-      decoration: BoxDecoration(
-        color: colors.surfaceContainerHighest,
-        borderRadius: BorderRadius.circular(4),
-      ),
-      child: Text(label, style: TextStyle(fontSize: 11, color: colors.onSurface.withValues(alpha: 0.5))),
-    );
-  }
-
   Widget _buildLinkedBookCard(ColorScheme colors) {
     final linkedBookId = _book['book_id'] as String? ?? '';
     if (linkedBookId.isEmpty) {

lib/pages/game/game_tab_page.dart

@@ -166,7 +166,6 @@ class _GameTabPageState extends State<GameTabPage> {
 
   @override
   Widget build(BuildContext context) {
-    final colors = Theme.of(context).colorScheme;
     final isWideContent = Breakpoint.isWideContent(context);
     final provider = context.watch<AppProvider>();
     final isWallMode = provider.gameWallMode;

lib/pages/home/home_page.dart

@@ -826,48 +826,6 @@ class _CityPainter extends CustomPainter {
   bool shouldRepaint(_CityPainter old) => old.t != t;
 }
 
-// ─── 不拦截滑动手势的弹窗路由 ──────────────────────────────
-
-class _NoSwipeDialogRoute<T> extends PageRoute<T> {
-  final WidgetBuilder builder;
-
-  _NoSwipeDialogRoute({required this.builder});
-
-  @override
-  bool get popGestureEnabled => false; // 关键：禁止拖拽关闭，不拦截水平手势
-
-  @override
-  bool get barrierDismissible => true;
-
-  @override
-  Color? get barrierColor => Colors.black54;
-
-  @override
-  String? get barrierLabel => 'Dismiss';
-
-  @override
-  Duration get transitionDuration => const Duration(milliseconds: 200);
-
-  @override
-  Duration get reverseTransitionDuration => const Duration(milliseconds: 150);
-
-  @override
-  Widget buildPage(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation) {
-    return builder(context);
-  }
-
-  @override
-  Widget buildTransitions(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation, Widget child) {
-    return FadeTransition(opacity: animation, child: child);
-  }
-
-  @override
-  bool get opaque => false;
-
-  @override
-  bool get maintainState => true;
-}
-
 // ─── 漫步弹窗 ──────────────────────────────────────────
 
 class _StrollDialog extends StatefulWidget {
@@ -4451,7 +4409,6 @@ class _DesktopNoteItem extends StatelessWidget {
 
   void _showContextMenu(BuildContext context, TapUpDetails details) {
     final provider = context.read<AppProvider>();
-    final overlay = Overlay.of(context);
     final renderBox = context.findRenderObject() as RenderBox;
     final position = renderBox.localToGlobal(details.localPosition);
 

lib/pages/movies/movie_tab_page.dart

@@ -194,7 +194,6 @@ class _MovieTabPageState extends State<MovieTabPage> {
 
   @override
   Widget build(BuildContext context) {
-    final colors = Theme.of(context).colorScheme;
     final isWideContent = Breakpoint.isWideContent(context);
     final provider = context.watch<AppProvider>();
     final isWallMode = provider.movieWallMode;

lib/pages/profile/settings_page.dart

@@ -1,7 +1,6 @@
 import 'dart:convert';
 import 'dart:io';
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:path/path.dart' as path;
 import 'package:provider/provider.dart';