feat: 公开商品页重设计 + web 上传修复 + 二维码配置

- 公开商品页（/product/:uuid）全面重设计：全宽正方形图片轮播、
  左右滑动切图、点击放大全屏查看、商品参数含描述、页脚贴底
- 修复 Flutter web 文件上传无反应（path→bytes）
- 修复 web 路由空白页（usePathUrlStrategy + 单层 MaterialApp.router）
- 二维码 URL 改为从 STORAGE_PUBLIC_URL 环境变量读取
- 新增 PUBLIC_URL dart-define → AppConfig.publicBaseUrl
- 新增 CI/CD workflows + NAS runner compose 配置
- seed S001 补充商品描述字段

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

client/lib/main.dart

@@ -1,13 +1,14 @@
 import 'dart:async';
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_web_plugins/url_strategy.dart';
 import 'core/auth/auth_state.dart';
 import 'core/router/app_router.dart';
 import 'core/theme/app_theme.dart';
 import 'providers/connectivity_provider.dart';
 
 void main() {
+  usePathUrlStrategy();
   FlutterError.onError = (details) {
     FlutterError.presentError(details);
     debugPrint('═══ FlutterError ════════════════════════════');
@@ -25,65 +26,34 @@ void main() {
   );
 }
 
-class JiuApp extends ConsumerWidget {
+class JiuApp extends ConsumerStatefulWidget {
   const JiuApp({super.key});
 
   @override
-  Widget build(BuildContext context, WidgetRef ref) {
-    return MaterialApp(
-      title: '酒库管理系统',
-      theme: AppTheme.light(),
-      debugShowCheckedModeBanner: false,
-      home: const _AppBootstrap(),
-    );
-  }
+  ConsumerState<JiuApp> createState() => _JiuAppState();
 }
 
-/// Restores persisted auth before handing off to the router.
-class _AppBootstrap extends ConsumerStatefulWidget {
-  const _AppBootstrap();
-
-  @override
-  ConsumerState<_AppBootstrap> createState() => _AppBootstrapState();
-}
-
-class _AppBootstrapState extends ConsumerState<_AppBootstrap> {
-  bool _ready = false;
-
+class _JiuAppState extends ConsumerState<JiuApp> {
   @override
   void initState() {
     super.initState();
-    _init();
-  }
-
-  Future<void> _init() async {
-    await ref.read(authStateProvider.notifier).restore();
-    // 启动时立即做一次连通性检测，确保 connectivityProvider 状态在路由跳转前已就绪
-    await ref.read(connectivityProvider.notifier).forceCheck();
-    if (mounted) setState(() => _ready = true);
+    // 异步初始化：恢复 auth + 连通性检测
+    // 路由 redirect 在 initialized=false 时返回 null（不重定向），
+    // 初始化完成后 authState 变化触发 router refresh，redirect 重新执行
+    WidgetsBinding.instance.addPostFrameCallback((_) async {
+      await ref.read(authStateProvider.notifier).restore();
+      await ref.read(connectivityProvider.notifier).forceCheck();
+    });
   }
 
   @override
   Widget build(BuildContext context) {
-    if (!_ready) {
-      return const Scaffold(
-        body: Center(child: CircularProgressIndicator()),
-      );
-    }
-    return _RouterApp();
-  }
-}
-
-class _RouterApp extends ConsumerWidget {
-  @override
-  Widget build(BuildContext context, WidgetRef ref) {
     final router = ref.watch(appRouterProvider);
     return MaterialApp.router(
       title: '酒库管理系统',
       theme: AppTheme.light(),
       routerConfig: router,
       debugShowCheckedModeBanner: false,
-      builder: (context, child) => SelectionArea(child: child!),
     );
   }
 }