fix: group update issues

internal/db_channel.go

@@ -155,7 +155,7 @@ func (c *DBChannel) SaveMessage(ctx context.Context, msg *ChannelMessage) error
 
 	// 如果找到记录，那么更新记录
 	stmt := tbl.UPDATE().SET(
-		tbl.Content.SET(RawString(`CONCAT(content, #var)`, RawArgs{
+		tbl.Content.SET(RawString(`CONCAT(content, #var::varchar)`, RawArgs{
 			"#var": *message.Content,
 		})),
 		tbl.Media.SET(RawString(`media || #var::jsonb`, RawArgs{
@@ -167,7 +167,8 @@ func (c *DBChannel) SaveMessage(ctx context.Context, msg *ChannelMessage) error
 		),
 	)
 
-	_, err = db.ExecContext(ctx, stmt.DebugSql())
+	_, err = stmt.ExecContext(ctx, db)
+	// _, err = db.ExecContext(ctx, stmt.DebugSql())
 
 	return err
 }