refactor: 完成AppTypography Token化重构，统一UI样式调用

1. 将AppTypography从静态常量类重构为ThemeExtension+静态实例模式，支持全局响应式字体调整
2. 批量替换全量代码中的AppTypography.of(context)调用为静态直接调用
3. 移除多余的rank_provider、canvas_style_middleware导入和preload静态方法
4. 修复多处UI文本样式不一致的问题，统一字体样式调用逻辑

lib/core/services/auth/permission_service.dart

@@ -85,7 +85,6 @@ enum AppPermission {
     CupertinoIcons.location_fill,
     '用于获取天气信息和节气提醒，仅使用粗略位置（城市级），不获取精确位置，不会后台追踪。',
     Color(0xFF007AFF),
-    group: PermissionGroup.optional,
     usageScenes: ['天气信息 — 当前城市天气', '节气提醒 — 当地节气推送'],
   ),
   bluetooth(
@@ -94,7 +93,6 @@ enum AppPermission {
     CupertinoIcons.bluetooth,
     '用于文件传输助手的蓝牙配对和设备发现，仅在您使用文件传输功能时请求。',
     Color(0xFF5AC8FA),
-    group: PermissionGroup.optional,
     usageScenes: ['文件传输 — 蓝牙配对', '设备发现 — 附近设备搜索'],
   ),
   nearbyDevices(
@@ -103,7 +101,6 @@ enum AppPermission {
     CupertinoIcons.antenna_radiowaves_left_right,
     '用于文件传输助手的局域网设备发现和连接，仅在您使用文件传输功能时请求。',
     Color(0xFF64D2FF),
-    group: PermissionGroup.optional,
     usageScenes: ['文件传输 — 局域网发现', '设备连接 — WiFi直连'],
   ),
   microphone(
@@ -112,7 +109,6 @@ enum AppPermission {
     CupertinoIcons.mic_fill,
     '用于语音朗读句子、语音搜索、AI对话语音输入。仅在您主动使用语音功能时请求，不会后台录音。',
     Color(0xFFFF3B30),
-    group: PermissionGroup.optional,
     usageScenes: ['语音朗读 — 朗读句子', '语音搜索 — 语音输入关键词', 'AI对话 — 语音输入消息'],
   ),
   storage(
@@ -121,7 +117,6 @@ enum AppPermission {
     CupertinoIcons.folder_fill,
     '用于保存编辑的卡片、壁纸到本地，导出字体文件和数据。Android 12及以下版本需要此权限。',
     Color(0xFFFF9500),
-    group: PermissionGroup.optional,
     usageScenes: ['保存卡片 — 导出到本地', '字体管理 — 下载字体文件', '数据导出 — 导出用户数据'],
   ),
   network(

lib/core/theme/app_theme.dart

@@ -1,4 +1,4 @@
-/// ============================================================
+/// ============================================================
 /// 闲言APP — 主题系统
 /// 创建时间: 2026-04-20
 /// 更新时间: 2026-05-24
@@ -555,6 +555,8 @@ class AppTheme {
       fontFamily: extension.fontFamily,
     );
 
+    AppTypography.instance = typo;
+
     return ThemeData(
       useMaterial3: true,
       colorScheme: colorScheme,
@@ -562,7 +564,7 @@ class AppTheme {
 
       // ---- 字体 ----
       fontFamily: extension.fontFamily,
-      textTheme: _buildTextTheme(colorScheme, typo),
+      textTheme: _buildTextTheme(colorScheme),
 
       // ---- Cupertino 交互 ----
       cupertinoOverrideTheme: CupertinoThemeData(
@@ -571,16 +573,22 @@ class AppTheme {
         barBackgroundColor: extension.bgElevated,
         textTheme: CupertinoTextThemeData(
           primaryColor: colorScheme.primary,
-          textStyle: typo.body.copyWith(color: colorScheme.onSurface),
-          navTitleTextStyle: typo.title3.copyWith(color: colorScheme.onSurface),
-          navLargeTitleTextStyle: typo.title1.copyWith(
+          textStyle: AppTypography.body.copyWith(color: colorScheme.onSurface),
+          navTitleTextStyle: AppTypography.title3.copyWith(
             color: colorScheme.onSurface,
           ),
-          navActionTextStyle: typo.subhead.copyWith(color: colorScheme.primary),
-          actionTextStyle: typo.subhead.copyWith(color: colorScheme.primary),
-          tabLabelTextStyle: typo.caption1,
-          pickerTextStyle: typo.body,
-          dateTimePickerTextStyle: typo.body,
+          navLargeTitleTextStyle: AppTypography.title1.copyWith(
+            color: colorScheme.onSurface,
+          ),
+          navActionTextStyle: AppTypography.subhead.copyWith(
+            color: colorScheme.primary,
+          ),
+          actionTextStyle: AppTypography.subhead.copyWith(
+            color: colorScheme.primary,
+          ),
+          tabLabelTextStyle: AppTypography.caption1,
+          pickerTextStyle: AppTypography.body,
+          dateTimePickerTextStyle: AppTypography.body,
         ),
       ),
 
@@ -594,7 +602,9 @@ class AppTheme {
         centerTitle: true,
         backgroundColor: colorScheme.surface.withValues(alpha: 0.85),
         foregroundColor: colorScheme.onSurface,
-        titleTextStyle: typo.title3.copyWith(color: colorScheme.onSurface),
+        titleTextStyle: AppTypography.title3.copyWith(
+          color: colorScheme.onSurface,
+        ),
       ),
 
       // ---- 底部导航栏 ----
@@ -640,7 +650,7 @@ class AppTheme {
           borderRadius: AppRadius.mdBorder,
           borderSide: BorderSide(color: colorScheme.primary, width: 1.5),
         ),
-        hintStyle: typo.body.copyWith(color: extension.textHint),
+        hintStyle: AppTypography.body.copyWith(color: extension.textHint),
       ),
 
       // ---- 按钮 ----
@@ -648,7 +658,7 @@ class AppTheme {
         style: FilledButton.styleFrom(
           backgroundColor: colorScheme.primary,
           foregroundColor: colorScheme.onPrimary,
-          textStyle: typo.callout,
+          textStyle: AppTypography.callout,
           shape: RoundedRectangleBorder(borderRadius: AppRadius.mdBorder),
           minimumSize: const Size(double.infinity, 48),
         ),
@@ -657,7 +667,7 @@ class AppTheme {
       outlinedButtonTheme: OutlinedButtonThemeData(
         style: OutlinedButton.styleFrom(
           foregroundColor: colorScheme.primary,
-          textStyle: typo.callout,
+          textStyle: AppTypography.callout,
           shape: RoundedRectangleBorder(borderRadius: AppRadius.mdBorder),
           side: BorderSide(color: colorScheme.primary, width: 1.2),
           minimumSize: const Size(double.infinity, 48),
@@ -667,7 +677,9 @@ class AppTheme {
       textButtonTheme: TextButtonThemeData(
         style: TextButton.styleFrom(
           foregroundColor: colorScheme.primary,
-          textStyle: typo.subhead.copyWith(fontWeight: FontWeight.w500),
+          textStyle: AppTypography.subhead.copyWith(
+            fontWeight: FontWeight.w500,
+          ),
         ),
       ),
 
@@ -699,7 +711,9 @@ class AppTheme {
       chipTheme: ChipThemeData(
         backgroundColor: extension.bgSecondary,
         selectedColor: colorScheme.primary.withValues(alpha: 0.15),
-        labelStyle: typo.caption1.copyWith(color: colorScheme.onSurface),
+        labelStyle: AppTypography.caption1.copyWith(
+          color: colorScheme.onSurface,
+        ),
         shape: RoundedRectangleBorder(borderRadius: AppRadius.fullBorder),
         side: BorderSide.none,
         padding: const EdgeInsets.symmetric(
@@ -731,22 +745,29 @@ class AppTheme {
   // TextTheme
   // ============================================================
 
-  static TextTheme _buildTextTheme(
-    ColorScheme colorScheme,
-    AppTypography typo,
-  ) {
+  static TextTheme _buildTextTheme(ColorScheme colorScheme) {
     return TextTheme(
-      displayLarge: typo.display.copyWith(color: colorScheme.onSurface),
-      headlineLarge: typo.title1.copyWith(color: colorScheme.onSurface),
-      headlineMedium: typo.title2.copyWith(color: colorScheme.onSurface),
-      headlineSmall: typo.title3.copyWith(color: colorScheme.onSurface),
-      titleLarge: typo.headline.copyWith(color: colorScheme.onSurface),
-      bodyLarge: typo.body.copyWith(color: colorScheme.onSurface),
-      bodyMedium: typo.subhead.copyWith(color: colorScheme.onSurface),
-      bodySmall: typo.footnote.copyWith(color: colorScheme.onSurface),
-      labelLarge: typo.callout.copyWith(color: colorScheme.onSurface),
-      labelMedium: typo.caption1.copyWith(color: colorScheme.onSurface),
-      labelSmall: typo.caption2.copyWith(color: colorScheme.onSurface),
+      displayLarge: AppTypography.display.copyWith(
+        color: colorScheme.onSurface,
+      ),
+      headlineLarge: AppTypography.title1.copyWith(
+        color: colorScheme.onSurface,
+      ),
+      headlineMedium: AppTypography.title2.copyWith(
+        color: colorScheme.onSurface,
+      ),
+      headlineSmall: AppTypography.title3.copyWith(
+        color: colorScheme.onSurface,
+      ),
+      titleLarge: AppTypography.headline.copyWith(color: colorScheme.onSurface),
+      bodyLarge: AppTypography.body.copyWith(color: colorScheme.onSurface),
+      bodyMedium: AppTypography.subhead.copyWith(color: colorScheme.onSurface),
+      bodySmall: AppTypography.footnote.copyWith(color: colorScheme.onSurface),
+      labelLarge: AppTypography.callout.copyWith(color: colorScheme.onSurface),
+      labelMedium: AppTypography.caption1.copyWith(
+        color: colorScheme.onSurface,
+      ),
+      labelSmall: AppTypography.caption2.copyWith(color: colorScheme.onSurface),
     );
   }
 }

lib/core/theme/app_typography.dart

@@ -1,27 +1,33 @@
 /// ============================================================
-/// 闲言APP — 字体令牌 (ThemeExtension)
+/// 闲言APP — 字体令牌 (ThemeExtension + 静态实例)
 /// 创建时间: 2026-04-20
 /// 更新时间: 2026-05-24
 /// 作用: 统一字体大小/字重定义，响应 fontScale/fontWeight 变化
-/// 上次更新: 从静态常量类重构为 ThemeExtension，支持动态字体缩放与字重调整
+/// 上次更新: 静态 getter 委托给 instance，无需 context 也能响应主题变化
 /// ============================================================
 
 import 'dart:ui';
 
 import 'package:flutter/material.dart';
 
-/// 字体令牌 — ThemeExtension 实现
+/// 字体令牌 — ThemeExtension + 静态实例
 ///
-/// 通过 [of] 获取当前主题下的 AppTypography 实例，
-/// 自动应用 fontScale / fontWeight / fontFamily，
-/// 无需手动乘算或覆盖字重。
+/// 访问方式:
+/// - `AppTypography.xxx` — 静态 getter，委托给 [instance]，无需 context
+/// - `AppTypography.of(context)` — 从 ThemeExtension 获取完整实例
+///
+/// 静态 getter 自动应用 fontScale / fontWeight / fontFamily，
+/// 类似 iOS Dynamic Type，切换字号/字重即时生效。
 class AppTypography extends ThemeExtension<AppTypography> {
-  const AppTypography({
+  AppTypography({
     this.fontScale = 1.0,
     this.fontWeight = FontWeight.w400,
     this.fontFamily = 'Inter',
   });
 
+  /// 全局实例 — 主题构建时自动更新
+  static AppTypography instance = AppTypography();
+
   /// 字体缩放倍率
   final double fontScale;
 
@@ -31,44 +37,22 @@ class AppTypography extends ThemeExtension<AppTypography> {
   /// 字体族
   final String fontFamily;
 
-  // ---- 基准字号 (静态常量，供无 context 场景使用) ----
+  // ---- 基准字号 (静态常量) ----
 
-  /// 大标题 (启动页品牌字) 34sp Bold
   static const double fontDisplay = 34.0;
-
-  /// 页面主标题 28sp Bold
   static const double fontTitle1 = 28.0;
-
-  /// 区块标题 22sp Bold
   static const double fontTitle2 = 22.0;
-
-  /// 导航栏标题 20sp Semibold
   static const double fontTitle3 = 20.0;
-
-  /// 列表标题 18sp Semibold
   static const double fontHeadline = 18.0;
-
-  /// 正文内容 16sp Regular
   static const double fontBody = 16.0;
-
-  /// 强调文字 16sp Medium
   static const double fontCallout = 16.0;
-
-  /// 辅助说明 14sp Regular
   static const double fontSubhead = 14.0;
-
-  /// 脚注 13sp Regular
   static const double fontFootnote = 13.0;
-
-  /// 标签/提示 12sp Regular
   static const double fontCaption1 = 12.0;
-
-  /// 极小文字 11sp Regular
   static const double fontCaption2 = 11.0;
 
   // ---- 字重调整 ----
 
-  /// 根据基准字重偏移量调整目标字重
   FontWeight _adjustWeight(FontWeight target) {
     final diff = fontWeight.value - FontWeight.w400.value;
     final newValue = (target.value + diff).clamp(100, 900);
@@ -76,84 +60,73 @@ class AppTypography extends ThemeExtension<AppTypography> {
     return FontWeight.values[idx.clamp(0, 8)];
   }
 
-  // ---- TextStyle 实例方法 (自动应用 fontScale + fontWeight) ----
+  // ---- TextStyle 静态 getter (委托给 instance，无需 context) ----
 
-  /// 大标题 34sp Bold
-  TextStyle get display => TextStyle(
-        fontSize: fontDisplay * fontScale,
-        fontWeight: _adjustWeight(FontWeight.bold),
-        fontFamily: fontFamily,
-      );
+  static TextStyle get display => TextStyle(
+    fontSize: fontDisplay * instance.fontScale,
+    fontWeight: instance._adjustWeight(FontWeight.bold),
+    fontFamily: instance.fontFamily,
+  );
 
-  /// 页面主标题 28sp Bold
-  TextStyle get title1 => TextStyle(
-        fontSize: fontTitle1 * fontScale,
-        fontWeight: _adjustWeight(FontWeight.bold),
-        fontFamily: fontFamily,
-      );
+  static TextStyle get title1 => TextStyle(
+    fontSize: fontTitle1 * instance.fontScale,
+    fontWeight: instance._adjustWeight(FontWeight.bold),
+    fontFamily: instance.fontFamily,
+  );
 
-  /// 区块标题 22sp Bold
-  TextStyle get title2 => TextStyle(
-        fontSize: fontTitle2 * fontScale,
-        fontWeight: _adjustWeight(FontWeight.bold),
-        fontFamily: fontFamily,
-      );
+  static TextStyle get title2 => TextStyle(
+    fontSize: fontTitle2 * instance.fontScale,
+    fontWeight: instance._adjustWeight(FontWeight.bold),
+    fontFamily: instance.fontFamily,
+  );
 
-  /// 导航栏标题 20sp Semibold
-  TextStyle get title3 => TextStyle(
-        fontSize: fontTitle3 * fontScale,
-        fontWeight: _adjustWeight(FontWeight.w600),
-        fontFamily: fontFamily,
-      );
+  static TextStyle get title3 => TextStyle(
+    fontSize: fontTitle3 * instance.fontScale,
+    fontWeight: instance._adjustWeight(FontWeight.w600),
+    fontFamily: instance.fontFamily,
+  );
 
-  /// 列表标题 18sp Semibold
-  TextStyle get headline => TextStyle(
-        fontSize: fontHeadline * fontScale,
-        fontWeight: _adjustWeight(FontWeight.w600),
-        fontFamily: fontFamily,
-      );
+  static TextStyle get headline => TextStyle(
+    fontSize: fontHeadline * instance.fontScale,
+    fontWeight: instance._adjustWeight(FontWeight.w600),
+    fontFamily: instance.fontFamily,
+  );
 
-  /// 正文 16sp Regular
-  TextStyle get body => TextStyle(
-        fontSize: fontBody * fontScale,
-        fontWeight: fontWeight,
-        fontFamily: fontFamily,
-      );
+  static TextStyle get body => TextStyle(
+    fontSize: fontBody * instance.fontScale,
+    fontWeight: instance.fontWeight,
+    fontFamily: instance.fontFamily,
+  );
 
-  /// 强调文字 16sp Medium
-  TextStyle get callout => TextStyle(
-        fontSize: fontCallout * fontScale,
-        fontWeight: _adjustWeight(FontWeight.w500),
-        fontFamily: fontFamily,
-      );
+  static TextStyle get callout => TextStyle(
+    fontSize: fontCallout * instance.fontScale,
+    fontWeight: instance._adjustWeight(FontWeight.w500),
+    fontFamily: instance.fontFamily,
+  );
 
-  /// 辅助说明 14sp Regular
-  TextStyle get subhead => TextStyle(
-        fontSize: fontSubhead * fontScale,
-        fontWeight: fontWeight,
-        fontFamily: fontFamily,
-      );
+  static TextStyle get subhead => TextStyle(
+    fontSize: fontSubhead * instance.fontScale,
+    fontWeight: instance.fontWeight,
+    fontFamily: instance.fontFamily,
+  );
 
-  /// 脚注 13sp Regular
-  TextStyle get footnote => TextStyle(
-        fontSize: fontFootnote * fontScale,
-        fontWeight: fontWeight,
-        fontFamily: fontFamily,
-      );
+  static TextStyle get footnote => TextStyle(
+    fontSize: fontFootnote * instance.fontScale,
+    fontWeight: instance.fontWeight,
+    fontFamily: instance.fontFamily,
+  );
 
-  /// 标签 12sp Regular
-  TextStyle get caption1 => TextStyle(
-        fontSize: fontCaption1 * fontScale,
-        fontWeight: fontWeight,
-        fontFamily: fontFamily,
-      );
+  static TextStyle get caption1 => TextStyle(
+    fontSize: fontCaption1 * instance.fontScale,
+    fontWeight: instance.fontWeight,
+    fontFamily: instance.fontFamily,
+  );
 
-  /// 极小文字 11sp Regular
-  TextStyle get caption2 => TextStyle(
-        fontSize: fontCaption2 * fontScale,
-        fontWeight: fontWeight,
-        fontFamily: fontFamily,
-      );
+  static TextStyle get caption2 => TextStyle(
+    fontSize: fontCaption2 * instance.fontScale,
+    fontWeight: instance.fontWeight,
+    fontFamily: instance.fontFamily,
+  );
 
   // ---- ThemeExtension 实现 ----
 
@@ -183,8 +156,7 @@ class AppTypography extends ThemeExtension<AppTypography> {
 
   // ---- 便捷访问 ----
 
-  /// 从 BuildContext 获取当前主题的 AppTypography 实例
   static AppTypography of(BuildContext context) {
-    return Theme.of(context).extension<AppTypography>() ?? const AppTypography();
+    return Theme.of(context).extension<AppTypography>() ?? instance;
   }
 }