fix: 优化 ParseStructMessages 函数中的类型断言，简化消息数组解析逻辑

qq_message/cq_message.go

@@ -52,9 +52,9 @@ func CreateMessage(messageType string) (QQMessage, error) {
 // ParseStructMessages 解析消息数组
 func ParseStructMessages(msgData any) []QQMessage {
 	log.Println("解析消息数组:", msgData)
-	switch msgData.(type) {
+	switch msgData := msgData.(type) {
 	case []map[string]any:
-		msgArray := msgData.([]map[string]any)
+		msgArray := msgData
 		messages := make([]QQMessage, 0, len(msgArray))
 		for _, raw := range msgArray {
 			msg, err := CreateMessage(raw["type"].(string))
@@ -80,7 +80,7 @@ func ParseStructMessages(msgData any) []QQMessage {
 		log.Println("解析出的QQ消息数组:", messages)
 		return messages
 	case string:
-		return []QQMessage{NewTextMessage().ParseMessage(msgData.(string))}
+		return []QQMessage{NewTextMessage().ParseMessage(msgData)}
 	}
 	return nil
 }