feat: 添加 SendForward 函数以支持消息转发，并更新 GenSendPkg 函数以处理转发逻辑

model/upstream_message.go

@@ -14,32 +14,52 @@ type SendPkg struct {
 
 // 上游包的参数结构体
 type UpstreamParams struct {
-	UserID     int64       `json:"user_id"`
-	GroupID    int64       `json:"group_id"`
-	Message    interface{} `json:"message"`
-	AutoEscape bool        `json:"auto_escape"`
+	UserID     int64 `json:"user_id"`
+	GroupID    int64 `json:"group_id"`
+	Message    any   `json:"message"`
+	AutoEscape bool  `json:"auto_escape"`
 }
 
-func GenSendPkg(userID int64, groupID int64, message interface{}, autoEscape bool) SendPkg {
+func GenSendPkg(userID int64, groupID int64, message any, autoEscape bool, forward bool) SendPkg {
 	if groupID == 0 {
+		if forward {
+			return SendPkg{
+				Action: constants.FORWARD_MSG_SEND,
+				Params: UpstreamParams{
+					UserID:  userID,
+					Message: message,
+				},
+			}
+		} else {
+			return SendPkg{
+				Action: constants.PRIVATE_MSG_SEND,
+				Params: UpstreamParams{
+					UserID:     userID,
+					Message:    message,
+					AutoEscape: autoEscape,
+				},
+			}
+		}
+	}
+	if forward {
 		return SendPkg{
-			Action: constants.PRIVATE_MSG_SEND,
+			Action: constants.FORWARD_MSG_SEND,
+			Params: UpstreamParams{
+				UserID:  userID,
+				Message: message,
+			},
+		}
+	} else {
+		return SendPkg{
+			Action: constants.GROUP_MSG_SEND,
 			Params: UpstreamParams{
 				UserID:     userID,
+				GroupID:    groupID,
 				Message:    message,
 				AutoEscape: autoEscape,
 			},
 		}
 	}
-	return SendPkg{
-		Action: constants.GROUP_MSG_SEND,
-		Params: UpstreamParams{
-			UserID:     userID,
-			GroupID:    groupID,
-			Message:    message,
-			AutoEscape: autoEscape,
-		},
-	}
 }
 
 // 事件的消息结构体