fix(backend): 修复分享卡片 <title> 因缩进导致替换失效的问题

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

CHANGELOG.md

@@ -5,6 +5,12 @@ 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).
 
+## [1.0.45] - 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

backend/internal/handler/public.go

@@ -6,6 +6,7 @@ import (
 	"html"
 	"net/http"
 	"os"
+	"regexp"
 	"strconv"
 	"strings"
 
@@ -315,7 +316,9 @@ func (h *PublicHandler) ProductPage(c *gin.Context) {
 	ogTags := buildProductOG(product, shopName, config.C.Storage.PublicURL)
 	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
-	out := strings.Replace(idxHTML, "<title>岩美</title>", "<title>"+html.EscapeString(ogTitle)+"</title>", 1)
+	// 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")