chore: 汇总批量提交的功能优化与bug修复

本次提交包含多项迭代优化和问题修复：
1. 新增缩略图图片组件、数字格式化工具类，补充多语言翻译类型与本地化支持
2. 优化底部导航栏主题色统一使用动态accent色值
3. 修复多处图表动画、路由跳转、API请求相关问题
4. 简化服务器公告文案，调整默认分屏状态为关闭
5. 新增安卓/iOS桌面快捷方式配置
6. 重构多处状态管理类使用SafeNotifierInit统一异常保护
7. 替换硬编码蓝色为主题色，更新版本号获取方式为动态读取
8. 优化缓存预加载逻辑，移除无用代码
9. 调整默认设置项，优化用户体验细节

lib/core/utils/ui/rtl_utils.dart

@@ -0,0 +1,85 @@
+/// ============================================================
+/// 闲言APP — RTL布局工具
+/// 创建时间: 2026-05-31
+/// 更新时间: 2026-05-31
+/// 作用: 提供RTL感知的EdgeInsets/Alignment工具方法，方便逐步迁移
+/// 上次更新: 初始创建，提供方向感知的padding/margin工具
+/// ============================================================
+
+import 'package:flutter/widgets.dart';
+
+/// RTL布局工具类
+/// 提供方向感知的EdgeInsets和Alignment工具方法
+///
+/// 使用方式:
+/// ```dart
+/// // 替代 EdgeInsets.only(left: 16)
+/// padding: RtlPadding.only(start: 16, context),
+///
+/// // 替代 EdgeInsets.only(left: 16, right: 8)
+/// padding: RtlPadding.only(start: 16, end: 8, context),
+/// ```
+class RtlPadding {
+  /// 方向感知的EdgeInsets.only
+  /// [start] 在LTR中为left，RTL中为right
+  /// [end] 在LTR中为right，RTL中为left
+  static EdgeInsets only({
+    double start = 0,
+    double end = 0,
+    double top = 0,
+    double bottom = 0,
+    required BuildContext context,
+  }) {
+    final isRtl = Directionality.of(context) == TextDirection.rtl;
+    return EdgeInsets.only(
+      left: isRtl ? end : start,
+      right: isRtl ? start : end,
+      top: top,
+      bottom: bottom,
+    );
+  }
+
+  /// 方向感知的EdgeInsets.symmetric
+  /// [horizontalStart] 对应start方向，[horizontalEnd] 对应end方向
+  static EdgeInsets symmetric({
+    double horizontalStart = 0,
+    double horizontalEnd = 0,
+    double vertical = 0,
+    required BuildContext context,
+  }) {
+    final isRtl = Directionality.of(context) == TextDirection.rtl;
+    return EdgeInsets.only(
+      left: isRtl ? horizontalEnd : horizontalStart,
+      right: isRtl ? horizontalStart : horizontalEnd,
+      top: vertical,
+      bottom: vertical,
+    );
+  }
+}
+
+/// RTL感知的Alignment工具
+class RtlAlignment {
+  /// start对齐：LTR中为left，RTL中为right
+  static AlignmentDirectional get start => AlignmentDirectional.centerStart;
+
+  /// end对齐：LTR中为right，RTL中为left
+  static AlignmentDirectional get end => AlignmentDirectional.centerEnd;
+
+  /// topStart对齐
+  static AlignmentDirectional get topStart => AlignmentDirectional.topStart;
+
+  /// topEnd对齐
+  static AlignmentDirectional get topEnd => AlignmentDirectional.topEnd;
+
+  /// bottomStart对齐
+  static AlignmentDirectional get bottomStart =>
+      AlignmentDirectional.bottomStart;
+
+  /// bottomEnd对齐
+  static AlignmentDirectional get bottomEnd => AlignmentDirectional.bottomEnd;
+}
+
+/// 判断当前上下文是否为RTL
+bool isContextRtl(BuildContext context) {
+  return Directionality.of(context) == TextDirection.rtl;
+}

lib/core/utils/ui/sheet_animation_notifier.dart

@@ -1,18 +1,19 @@
 /// ============================================================
 /// 闲言APP — Sheet动画同步通知器
 /// 创建时间: 2026-04-30
-/// 更新时间: 2026-05-25
+/// 更新时间: 2026-05-30
 /// 作用: 全局Sheet动画进度同步，让底层页面响应Sheet弹出/拖拽
-/// 上次更新: 添加帧率节流30fps+值缓存避免重复notify+ValueNotifier替代ChangeNotifier
+/// 上次更新: 从全局单例改为Riverpod Provider，随页面生命周期自动管理
 /// ============================================================
 
-import 'package:flutter/foundation.dart';
+import 'package:flutter/widgets.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:xianyan/core/utils/performance_optimizer.dart';
 
+/// Sheet动画进度通知器
+/// 管理多个Sheet层的动画进度，聚合后通知UI更新
+/// 配合 AnimatedBuilder 使用，实现Sheet弹出时底层页面的缩放/圆角动画
 final class SheetAnimationNotifier extends ChangeNotifier {
-  SheetAnimationNotifier._();
-  static final SheetAnimationNotifier instance = SheetAnimationNotifier._();
-
   final Map<Object, double> _layers = {};
 
   double _cachedProgress = 0.0;
@@ -21,8 +22,10 @@ final class SheetAnimationNotifier extends ChangeNotifier {
   FrameRateThrottler get _throttle =>
       _throttler ??= FrameRateThrottler(AnimationFpsCategory.decorative);
 
+  /// 当前聚合动画进度 (0.0 ~ 2.0)
   double get progress => _cachedProgress;
 
+  /// 计算所有层的聚合进度
   double _computeProgress() {
     if (_layers.isEmpty) return 0.0;
     var total = 0.0;
@@ -32,6 +35,7 @@ final class SheetAnimationNotifier extends ChangeNotifier {
     return total.clamp(0.0, 2.0);
   }
 
+  /// 更新指定层的进度值
   void updateLayer(Object key, double value) {
     final clamped = value.clamp(0.0, 1.0);
     if (_layers.containsKey(key) && (_layers[key]! - clamped).abs() < 0.001) {
@@ -46,16 +50,33 @@ final class SheetAnimationNotifier extends ChangeNotifier {
     }
   }
 
+  /// 移除指定层
   void removeLayer(Object key) {
     if (_layers.remove(key) != null) {
       _cachedProgress = _computeProgress();
-      notifyListeners();
+      if (hasListeners) notifyListeners();
     }
   }
 
+  /// 重置所有层
   void reset() {
     _layers.clear();
     _cachedProgress = 0.0;
-    notifyListeners();
+    if (hasListeners) notifyListeners();
+  }
+
+  /// 通过 ProviderScope 获取实例的兼容方法
+  /// 用于非 ConsumerWidget/ConsumerStatefulWidget 场景
+  static SheetAnimationNotifier of(BuildContext context) {
+    return ProviderScope.containerOf(context).read(sheetAnimationProvider);
   }
 }
+
+/// Sheet动画进度 Riverpod provider
+/// 使用 Provider + ref.onDispose 管理生命周期
+/// 页面销毁时自动 dispose 通知器，释放监听资源
+final sheetAnimationProvider = Provider<SheetAnimationNotifier>((ref) {
+  final notifier = SheetAnimationNotifier();
+  ref.onDispose(notifier.dispose);
+  return notifier;
+});