优化发布群配置与二维码池界面

backend/internal/modules/systemconfig/repository.go

@@ -37,6 +37,7 @@ var defaultConfigs = []defaultConfig{
 	{Key: postRentalNoticeConfigKey, Value: defaultPostRentalNoticeConfigValue(), Description: "租后须知配置 JSON"},
 	{Key: "chat.default_support_admin_id", Value: "2", Description: "默认客服 ID（必须是启用状态的客服角色）"},
 	{Key: "chat.auto_welcome_message", Value: "欢迎加入订单群聊！如有任何问题，请随时沟通。", Description: "建群后自动发送的欢迎话术"},
+	{Key: "chat.listing_group_welcome", Value: "欢迎加入账号群！请号主扫描下方二维码加入企业微信群，方便客服与您及时联系。", Description: "发布群创建后自动发送的欢迎语"},
 	{Key: homeAnnouncementsConfigKey, Value: defaultHomeAnnouncementsConfigValue(), Description: "移动端首页公告 JSON 数组"},
 	{Key: homeBannersConfigKey, Value: defaultHomeBannersConfigValue(), Description: "移动端首页轮播图 JSON 数组"},
 	{Key: publishOptionsConfigKey, Value: defaultPublishOptionsConfigValue(), Description: "发布页选项配置 JSON"},
@@ -46,6 +47,7 @@ var defaultConfigs = []defaultConfig{
 var adminVisibleConfigKeys = []string{
 	"chat.auto_welcome_message",
 	"chat.default_support_admin_id",
+	"chat.listing_group_welcome",
 	"handoff.owner_return_confirm_timeout_minutes",
 	"handoff.owner_submit_timeout_minutes",
 	"handoff.renter_confirm_timeout_minutes",
@@ -155,6 +157,11 @@ func (r *Repository) ensureDefaults(ctx context.Context) error {
 					return err
 				}
 			}
+			if item.Key == "chat.listing_group_welcome" {
+				if err := updateLegacyListingGroupWelcome(tx, item); err != nil {
+					return err
+				}
+			}
 			if item.Key == publishOptionsConfigKey {
 				if err := updateLegacyPublishOptions(tx, item); err != nil {
 					return err
@@ -165,6 +172,26 @@ func (r *Repository) ensureDefaults(ctx context.Context) error {
 	})
 }
 
+func updateLegacyListingGroupWelcome(tx *gorm.DB, item defaultConfig) error {
+	var row model.SystemConfig
+	if err := tx.Where("`key` = ?", item.Key).First(&row).Error; err != nil {
+		return err
+	}
+	changed := false
+	if isMojibakeText(row.Value) {
+		row.Value = item.Value
+		changed = true
+	}
+	if row.Description != item.Description {
+		row.Description = item.Description
+		changed = true
+	}
+	if !changed {
+		return nil
+	}
+	return tx.Save(&row).Error
+}
+
 func updateDefaultSupportConfig(tx *gorm.DB, item defaultConfig) error {
 	var row model.SystemConfig
 	if err := tx.Where("`key` = ?", item.Key).First(&row).Error; err != nil {
@@ -260,6 +287,16 @@ func isLegacyPublishOptionsValue(value string) bool {
 	return false
 }
 
+func isMojibakeText(value string) bool {
+	mojibakeMarkers := []string{"å", "æ", "ç", "è", "é", "ä", "ï¼", "ã€", "â"}
+	for _, marker := range mojibakeMarkers {
+		if strings.Contains(value, marker) {
+			return true
+		}
+	}
+	return false
+}
+
 func appendAuditLog(tx *gorm.DB, actorID uint64, action string, bizID uint64, meta AuditMeta, detail map[string]any) error {
 	return auditlog.Append(tx, auditlog.Entry{
 		ActorType: "admin",