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 +5,11 @@ 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

backend/internal/handler/public.go

@@ -343,8 +343,15 @@ func buildOGTitle(product model.Product) string {
 func buildProductOG(product model.Product, shopName, publicURL string) string {
 	title := buildOGTitle(product)
 
-	// og:description：规格（度数/香型/容量）| 门店名正品
-	desc := product.Spec
+	// 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