platforms/apps/user_app/lib/app/app.dart

// 功能：装配用户端主题与路由，并让桌面 Web 预览保持产品图手机画布宽度。
// 版本：1.1.0。
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';

import '../ui/core/app_theme.dart';
import 'dependencies.dart';
import 'router.dart';

class UserClientApp extends StatefulWidget {
  const UserClientApp({required this.dependencies, super.key});

  final AppDependencies dependencies;

  @override
  State<UserClientApp> createState() => _UserClientAppState();
}

class _UserClientAppState extends State<UserClientApp> {
  late final _router = createRouter(widget.dependencies);

  @override
  Widget build(BuildContext context) => MaterialApp.router(
    title: '瓶安芯',
    // 首期面向中文用户，系统日期与时间控件统一使用简体中文。
    locale: const Locale('zh', 'CN'),
    supportedLocales: const [Locale('zh', 'CN')],
    localizationsDelegates: GlobalMaterialLocalizations.delegates,
    debugShowCheckedModeBanner: false,
    theme: AppTheme.light(),
    darkTheme: AppTheme.dark(),
    themeMode: ThemeMode.system,
    routerConfig: _router,
    builder: (context, child) {
      if (!kIsWeb) return child ?? const SizedBox.shrink();
      // 产品设计宽853像素按2倍密度绘制；Web预览以427 CSS像素展示同一手机画布。
      return ColoredBox(
        color: const Color(0xFFEFF2F7),
        child: Align(
          alignment: Alignment.topCenter,
          child: ConstrainedBox(
            constraints: const BoxConstraints(maxWidth: 427),
            child: SizedBox(width: double.infinity, child: child),
          ),
        ),
      );
    },
  );
}