fix(backend): 分享卡片描述补充系列（度数）信息

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

CHANGELOG.md

@@ -5,6 +5,38 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.47] - 2026-06-15
+
+### 修复
+- 微信分享卡片描述补充度数/系列信息，不再只显示规格
+
+## [1.0.46] - 2026-06-15
+
+### 修复
+- 微信内打开商品页时顶部标题栏显示商品名称，不再显示"岩美"
+
+## [1.0.45] - 2026-06-15
+
+### 修复
+- 修复微信分享卡片标题仍显示"岩美"的问题（HTML 缩进导致字符串匹配失败）
+- 微信分享卡片描述去掉"扫码验真"后缀
+
+## [1.0.44] - 2026-06-15
+
+### 改进
+- 微信分享卡片标题改为商品名称（之前仍显示"岩美"）
+- 微信分享卡片描述去掉"扫码验真"后缀
+
+## [1.0.43] - 2026-06-15
+
+### 修复
+- 修复微信/飞书分享商品链接时卡片只显示"岩美"而不显示商品名称和图片的问题
+
+## [1.0.42] - 2026-06-15
+
+### 修复
+- 修复商品二维码扫码页报"index.html not found"的错误
+
 ## [1.0.41] - 2026-06-15
 
 ### 改进

backend/config/config.go

@@ -80,7 +80,7 @@ func Load() {
 	viper.SetDefault("storage.upload_dir", "./uploads/images")
 	viper.SetDefault("storage.base_url", "http://localhost:8080/images")
 	viper.SetDefault("storage.public_url", "http://localhost:8081")
-	viper.SetDefault("storage.web_dir", "./client/build/web")
+	viper.SetDefault("storage.web_dir", "./web")
 
 	if err := viper.ReadInConfig(); err != nil {
 		log.Println("[config] no config file found, using defaults and env vars")

backend/internal/handler/public.go

@@ -6,6 +6,7 @@ import (
 	"html"
 	"net/http"
 	"os"
+	"regexp"
 	"strconv"
 	"strings"
 
@@ -313,15 +314,19 @@ func (h *PublicHandler) ProductPage(c *gin.Context) {
 
 	// 构造 OG 标签并注入 </head> 前
 	ogTags := buildProductOG(product, shopName, config.C.Storage.PublicURL)
-	out := strings.Replace(idxHTML, "</head>", ogTags+"</head>", 1)
+	ogTitle := buildOGTitle(product)
+	// 同时替换 <title> 标签，微信/飞书等平台有时优先读 <title> 而非 og:title
+	// 用正则替换避免缩进空格导致字符串不匹配
+	titleRe := regexp.MustCompile(`<title>[^<]*</title>`)
+	out := titleRe.ReplaceAllString(idxHTML, "<title>"+html.EscapeString(ogTitle)+"</title>")
+	out = strings.Replace(out, "</head>", ogTags+"</head>", 1)
+	// 禁止缓存，确保爬虫每次都能拿到最新 OG 标签
+	c.Header("Cache-Control", "no-store")
 	c.Data(http.StatusOK, "text/html; charset=utf-8", []byte(out))
 }
 
-// buildProductOG 构造基础 Open Graph meta 标签字符串。
-// 所有值经 html.EscapeString 转义，防止 XSS 或破坏 HTML 结构。
-// 无图片时不输出 og:image 行。
-func buildProductOG(product model.Product, shopName, publicURL string) string {
-	// og:title：品牌 + 商品名（品牌已含在名字中时不重复）+ 系列
+// buildOGTitle 生成商品的分享标题：品牌 + 商品名（品牌已含在名字中时不重复）+ 系列。
+func buildOGTitle(product model.Product) string {
 	title := product.Name
 	if product.Brand != "" && !strings.Contains(product.Name, product.Brand) {
 		title = product.Brand + title
@@ -329,10 +334,25 @@ func buildProductOG(product model.Product, shopName, publicURL string) string {
 	if product.Series != "" {
 		title = title + "（" + product.Series + "）"
 	}
+	return title
+}
 
-	// og:description：规格（度数/香型/容量）| 门店名正品 · 扫码验真
-	desc := product.Spec
-	suffix := "正品 · 扫码验真"
+// buildProductOG 构造基础 Open Graph meta 标签字符串。
+// 所有值经 html.EscapeString 转义，防止 XSS 或破坏 HTML 结构。
+// 无图片时不输出 og:image 行。
+func buildProductOG(product model.Product, shopName, publicURL string) string {
+	title := buildOGTitle(product)
+
+	// og:description：系列（度数/香型）· 规格（容量/单位）| 门店名正品
+	var specParts []string
+	if product.Series != "" {
+		specParts = append(specParts, product.Series)
+	}
+	if product.Spec != "" {
+		specParts = append(specParts, product.Spec)
+	}
+	desc := strings.Join(specParts, " · ")
+	suffix := "正品"
 	if shopName != "" {
 		suffix = shopName + suffix
 	}

client/lib/screens/public/public_product_screen.dart

@@ -2,6 +2,7 @@ import 'dart:math' as math;
 import 'package:dio/dio.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:go_router/go_router.dart';
 import 'package:url_launcher/url_launcher.dart';
 import '../../core/config/app_config.dart';
@@ -54,6 +55,13 @@ class _PublicProductScreenState extends State<PublicProductScreen> {
       );
       final data = (resp.data as Map<String, dynamic>)['data'] as Map<String, dynamic>;
       setState(() { _data = data; _loading = false; });
+      // 更新浏览器标签标题（Flutter Web 会写 document.title）
+      final name = data['name'] as String? ?? '';
+      if (name.isNotEmpty) {
+        SystemChrome.setApplicationSwitcherDescription(
+          ApplicationSwitcherDescription(label: name, primaryColor: 0xFF8B2331),
+        );
+      }
     } catch (e) {
       setState(() { _error = e.toString(); _loading = false; });
     }