chore: 初始化脚手架 — sunny_mochi 企业级 Flutter 模板

Core 基础设施：Flavor 三包体系、Drift+SQLCipher 加密数据库 7 拦截器 Dio 网络栈、CrashReporter 崩溃日志、Sealed Failure 错误体系 5 色板主题系统、Auth 认证骨架（Clean Architecture）、Dev Panel、Mock Adapter 通过验证：flutter analyze（0 errors）、flutter test（全绿）、staging APK 74.8MB
2026-05-14 12:51:05 +08:00
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+import 'package:flutter/material.dart';
+import 'package:flutter_screenutil/flutter_screenutil.dart';
+
+import 'package:sunny_mochi/core/theme/app_colors.dart';
+
+/// 应用主题工厂 — 按 [AppColorScheme] 真实切换全部色（对齐 iOS 4 套 plist）。
+///
+/// 与旧版差异：
+/// - 旧版只把 primary 当作 seed，nav/btn/bg 都写死，导致 4 套主题视觉差异不明显
+/// - 新版从 [AppPalettes] 读完整 10 色，AppBar/ColorScheme/extensions 全部按主题切
+/// - 通过 ThemeExtension 暴露 [AppPalette]，业务代码 `Theme.of(context).extension<AppPalette>()!.buttonBg` 读
+abstract class AppTheme {
+  static ThemeData light({AppColorScheme scheme = AppColorScheme.white}) {
+    final palette = AppPalettes.of(scheme);
+    return ThemeData(
+      useMaterial3: true,
+      // BackButton 图标：iOS 平台渲染 arrow_back_ios_new（< 样式），与登录页一致。
+      // ScrollBehavior 使用 defaultTargetPlatform，不受此字段影响。
+      platform: TargetPlatform.iOS,
+      // 全局字体 — HarmonyOS Sans SC（GB2312 子集，pubspec 注册）
+      fontFamily: 'HarmonyOS Sans SC',
+      colorScheme: ColorScheme.fromSeed(
+        seedColor: palette.primary,
+        primary: palette.primary,
+        secondary: palette.secondary,
+        surface: AppColors.surface,
+        error: AppColors.error,
+      ),
+      scaffoldBackgroundColor: palette.background,
+      primaryColor: palette.primary,
+      appBarTheme: AppBarTheme(
+        backgroundColor: palette.navBar,
+        foregroundColor: palette.navBarText,
+        elevation: 0,
+        // Material 3 默认会在滚动时给 AppBar 叠加 surfaceTint 染色（紫色）；
+        // 设计稿要求 navBar 保持纯白，必须显式置为 transparent + 0 elevation。
+        surfaceTintColor: Colors.transparent,
+        scrolledUnderElevation: 0,
+        centerTitle: true,
+        titleTextStyle: TextStyle(
+          color: palette.navBarText,
+          fontSize: 18.sp,
+          fontWeight: FontWeight.w600,
+        ),
+        iconTheme: IconThemeData(color: palette.navBarText, size: 22.sp),
+      ),
+      elevatedButtonTheme: ElevatedButtonThemeData(
+        style: ElevatedButton.styleFrom(
+          backgroundColor: palette.buttonBg,
+          foregroundColor: palette.buttonText,
+        ),
+      ),
+      filledButtonTheme: FilledButtonThemeData(
+        style: FilledButton.styleFrom(
+          backgroundColor: palette.buttonBg,
+          foregroundColor: palette.buttonText,
+        ),
+      ),
+      textButtonTheme: TextButtonThemeData(
+        style: TextButton.styleFrom(foregroundColor: palette.primary),
+      ),
+      tabBarTheme: TabBarThemeData(
+        labelColor: palette.tabBarSelected,
+        unselectedLabelColor: palette.tabBarNormal,
+        indicatorColor: palette.tabBarSelected,
+      ),
+      bottomNavigationBarTheme: BottomNavigationBarThemeData(
+        selectedItemColor: palette.tabBarSelected,
+        unselectedItemColor: palette.tabBarNormal,
+      ),
+      textTheme: TextTheme(
+        bodyLarge: TextStyle(fontSize: 16.sp, color: palette.text),
+        bodyMedium: TextStyle(fontSize: 14.sp, color: AppColors.textSecondary),
+        bodySmall: TextStyle(fontSize: 12.sp, color: AppColors.textHint),
+        titleLarge: TextStyle(
+          fontSize: 18.sp,
+          fontWeight: FontWeight.w600,
+          color: palette.text,
+        ),
+      ),
+      dividerColor: AppColors.divider,
+      dividerTheme: const DividerThemeData(space: 1, thickness: 1),
+      extensions: [palette],
+    );
+  }
+
+  static ThemeData dark({AppColorScheme scheme = AppColorScheme.white}) {
+    final palette = AppPalettes.of(scheme);
+    return ThemeData(
+      useMaterial3: true,
+      platform: TargetPlatform.iOS,
+      brightness: Brightness.dark,
+      colorScheme: ColorScheme.fromSeed(
+        seedColor: palette.primary,
+        primary: palette.primary,
+        secondary: palette.secondary,
+        brightness: Brightness.dark,
+      ),
+      primaryColor: palette.primary,
+      scaffoldBackgroundColor: const Color(0xFF121212),
+      appBarTheme: AppBarTheme(
+        backgroundColor: AppColors.navBarDark,
+        foregroundColor: Colors.white,
+        elevation: 0,
+        centerTitle: true,
+        titleTextStyle: TextStyle(
+          color: Colors.white,
+          fontSize: 17.sp,
+          fontWeight: FontWeight.w600,
+        ),
+      ),
+      bottomNavigationBarTheme: BottomNavigationBarThemeData(
+        selectedItemColor: palette.tabBarSelected,
+        unselectedItemColor: palette.tabBarNormal,
+      ),
+      extensions: [palette],
+    );
+  }
+}