fix(client): 商品公开页暂无图片时显示门店名首字，替换硬编码岩美

_EmptyGalleryContent 接收 shopName 参数，无图片时展示
门店名第一个字符的文字头像，不再显示品牌名。

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

client/lib/screens/public/public_product_screen.dart

@@ -130,7 +130,7 @@ class _PublicProductScreenState extends State<PublicProductScreen> {
               slivers: [
                 // 1. Gallery
                 SliverToBoxAdapter(
-                  child: _HeroGallery(imageUrls: imageUrls),
+                  child: _HeroGallery(imageUrls: imageUrls, shopName: shop?['name'] as String? ?? ''),
                 ),
                 // 2. Verified ribbon
                 SliverToBoxAdapter(
@@ -227,7 +227,8 @@ class _PublicProductScreenState extends State<PublicProductScreen> {
 
 class _HeroGallery extends StatefulWidget {
   final List<String> imageUrls;
-  const _HeroGallery({required this.imageUrls});
+  final String shopName;
+  const _HeroGallery({required this.imageUrls, this.shopName = ''});
 
   @override
   State<_HeroGallery> createState() => _HeroGalleryState();
@@ -280,7 +281,7 @@ class _HeroGalleryState extends State<_HeroGallery> {
           ),
           // Image or placeholder
           if (urls.isEmpty)
-            _EmptyGalleryContent()
+            _EmptyGalleryContent(shopName: widget.shopName)
           else
             PageView.builder(
               controller: _ctrl,
@@ -291,7 +292,7 @@ class _HeroGalleryState extends State<_HeroGallery> {
                 child: Image.network(
                   urls[i],
                   fit: BoxFit.contain,
-                  errorBuilder: (_, __, ___) => _EmptyGalleryContent(),
+                  errorBuilder: (_, __, ___) => _EmptyGalleryContent(shopName: widget.shopName),
                 ),
               ),
             ),
@@ -409,8 +410,12 @@ class _HeroGalleryState extends State<_HeroGallery> {
 }
 
 class _EmptyGalleryContent extends StatelessWidget {
+  final String shopName;
+  const _EmptyGalleryContent({this.shopName = ''});
+
   @override
   Widget build(BuildContext context) {
+    final initial = shopName.isNotEmpty ? shopName.characters.first : '店';
     return Center(
       child: Column(
         mainAxisSize: MainAxisSize.min,
@@ -421,9 +426,9 @@ class _EmptyGalleryContent extends StatelessWidget {
               color: const Color(0xFF0F3057),
               borderRadius: BorderRadius.circular(12),
             ),
-            child: const Center(
-              child: Text('岩美',
-                  style: TextStyle(color: Colors.white70, fontSize: 18, fontWeight: FontWeight.w700)),
+            child: Center(
+              child: Text(initial,
+                  style: const TextStyle(color: Colors.white70, fontSize: 28, fontWeight: FontWeight.w700)),
             ),
           ),
           const SizedBox(height: 12),

client/web/index.html

@@ -19,6 +19,13 @@
   <meta charset="UTF-8">
   <meta content="IE=Edge" http-equiv="X-UA-Compatible">
   <meta name="description" content="岩美酒库管理系统 — 酒店饮品库存与采购管理平台">
+  <meta name="color-scheme" content="light">
+  <style>
+    html, body {
+      background-color: #ffffff;
+      color-scheme: light;
+    }
+  </style>
 
   <!-- iOS meta tags & icons -->
   <meta name="mobile-web-app-capable" content="yes">

deploy/nginx-jiu.conf

@@ -39,6 +39,20 @@ server {
         try_files $uri $uri/ /app/index.html;
     }
 
+    # index.html 不缓存，确保每次发版后浏览器加载最新版
+    location = /app/index.html {
+        alias /opt/jiu/web/index.html;
+        add_header Cache-Control "no-cache, no-store, must-revalidate";
+        add_header Pragma "no-cache";
+        expires 0;
+    }
+
+    # 公开商品详情页（扫码跳转）→ 交给 Flutter Web 路由处理
+    location ~ ^/product/ {
+        root /opt/jiu/web;
+        try_files $uri /app/index.html;
+    }
+
     # 扫码页（/scan/<id> → scan.html，JS 从 URL 读取 id）
     location /scan/ {
         root /opt/jiu/marketing;

web/assets/colors_and_type.css

@@ -5,6 +5,8 @@
    ========================================================================= */
 
 :root {
+  color-scheme: light;
+
   /* ---------- Brand: Primary (Slate Blue) ---------- */
   /* Trustworthy enterprise blue with a slight slate cast. */
   --brand-50:  #EEF4FB;

web/index.html

@@ -3,6 +3,7 @@
 <head>
 <meta charset="UTF-8" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+<meta name="color-scheme" content="light" />
 <title>岩美酒库管理系统 — 为酒行与酒店设计的库存管理平台</title>
 <link rel="stylesheet" href="assets/colors_and_type.css" />
 <link rel="preconnect" href="https://fonts.googleapis.com">