feat: 5.4.0版本大更新，新增多端桌面小组件与多项功能优化

- 重构「灵感」模块为「发现」模块，统一页面命名与文案
- 新增flutter_tts语音朗读依赖与鸿蒙Nearby配对方式
- 添加Android/iOS/鸿蒙全平台桌面小组件支持（7种类型）
- 完善文件传输模块，新增画布邀请消息与删除会话功能
- 优化协作画布光标广播节流逻辑，修复已知bug
- 更新应用英文名与隐私政策入口，新增翻译API抽象层
- 移除用户中心多余的加号按钮，完善空状态组件类型

lib/core/layout/app_shell.dart

@@ -20,6 +20,7 @@ import '../utils/interaction_animations.dart';
 import '../utils/logger.dart';
 import '../../features/inspiration/providers/chat_provider.dart';
 import '../../features/settings/providers/theme_settings_provider.dart';
+import '../../l10n/translations.dart';
 import '../../shared/widgets/tab_icon_sprite.dart';
 import '../../main.dart' show liquidGlassReady;
 import '../../shared/widgets/glass_bottom_nav_bar.dart';
@@ -209,16 +210,17 @@ class AppShell extends ConsumerWidget {
     final characterId = settings.tabCharacterStyleId;
     final animIntensity = settings.animationIntensity.durationMultiplier;
     final unreadCount = ref.watch(chatProvider).unreadCount;
+    final t = ref.watch(translationsProvider);
 
     return GlassBottomNavBar(
       items: [
-        const GlassBottomNavBarItem(spriteType: TabSpriteType.home, label: '闲言'),
+        GlassBottomNavBarItem(spriteType: TabSpriteType.home, label: t.navHome),
         GlassBottomNavBarItem(
           spriteType: TabSpriteType.discover,
-          label: '发现',
+          label: t.navDiscover,
           badgeCount: unreadCount,
         ),
-        const GlassBottomNavBarItem(spriteType: TabSpriteType.profile, label: '我的'),
+        GlassBottomNavBarItem(spriteType: TabSpriteType.profile, label: t.navProfile),
       ],
       selectedIndex: currentIndex,
       onTabSelected: (index) => _onTabTap(context, index),

lib/core/layout/ohos_app_shell.dart

@@ -25,6 +25,7 @@ import '../../features/inspiration/presentation/pages/home/inspiration_page.dart
 import '../../features/home/presentation/home_page.dart';
 import '../../features/profile/presentation/profile_page.dart';
 import '../../features/settings/providers/theme_settings_provider.dart';
+import '../../l10n/translations.dart';
 import '../../main.dart' show liquidGlassReady;
 import '../../shared/widgets/glass_bottom_nav_bar.dart';
 import '../../shared/widgets/tab_icon_sprite.dart';
@@ -213,15 +214,16 @@ class _OhosAppShellState extends ConsumerState<OhosAppShell> {
     required String characterId,
     required double animIntensity,
   }) {
+    final t = ref.watch(translationsProvider);
     return GlassBottomNavBar(
       items: [
-        const GlassBottomNavBarItem(spriteType: TabSpriteType.home, label: '闲言'),
+        GlassBottomNavBarItem(spriteType: TabSpriteType.home, label: t.navHome),
         GlassBottomNavBarItem(
           spriteType: TabSpriteType.discover,
-          label: '发现',
+          label: t.navDiscover,
           badgeCount: unreadCount,
         ),
-        const GlassBottomNavBarItem(spriteType: TabSpriteType.profile, label: '我的'),
+        GlassBottomNavBarItem(spriteType: TabSpriteType.profile, label: t.navProfile),
       ],
       selectedIndex: _currentIndex,
       onTabSelected: (index) => setState(() => _currentIndex = index),