fix: Z35 禁止用中文昵称作 Postgres 库名，发布时纠正脏数据

绑定 database_name 改为 user_{id}；publish 遇非法库名 Sanitize 并回写，避免 EnsureDatabase 400。

Co-authored-by: Cursor <cursoragent@cursor.com>

platform/internal/logic/applogic/yuheng_ticket.go

@@ -191,10 +191,12 @@ func (l *AuthLogic) bindUserHostSync(u *userstore.User, hostKey, name, localID,
 		return nil, "", fmt.Errorf("host_key 已绑定其它公司")
 	}
 	online := fmt.Sprintf("%s_u%d", dbsync.ResolveOnlineDBID("", ch.ID), u.UserID)
-	dbName := strings.TrimSpace(u.DisplayName)
-	if dbName == "" {
-		dbName = fmt.Sprintf("user_%d", u.UserID)
+	// DisplayName 可中文；Postgres 物理库名必须 [a-z][a-z0-9_]{1,47}（Z35）
+	display := strings.TrimSpace(u.DisplayName)
+	if display == "" {
+		display = fmt.Sprintf("user_%d", u.UserID)
 	}
+	dbName := fmt.Sprintf("user_%d", u.UserID)
 	updated, err := l.svcCtx.Agents.AttachSyncBind(l.ctx, acc.AgentID, u.TenantID, ch.ID, online, dbName, true)
 	if err != nil {
 		return nil, "", err
@@ -214,7 +216,7 @@ func (l *AuthLogic) bindUserHostSync(u *userstore.User, hostKey, name, localID,
 		OnlineDBID:      online,
 		ChannelID:       ch.ID,
 		DatabaseName:    dbName,
-		DisplayName:     dbName,
+		DisplayName:     display,
 		Note:            note,
 	})
 	return updated, secret, nil