diff --git a/internal/model/types.go b/internal/model/types.go
index ac6166a..8d249fb 100644
--- a/internal/model/types.go
+++ b/internal/model/types.go
@@ -77,6 +77,8 @@ type SendMessageReq struct {
 	Content string `json:"content"`
 	// 时长
 	Duration int `json:"duration"`
+	// 辅助字段: 辅助元数据
+	Extra string `json:"extra,omitempty"`
 
 	// WebRTC 信令专用字段: 通话唯一ID
 	CallID string `json:"call_id,omitempty"`
diff --git a/internal/service/chat_service.go b/internal/service/chat_service.go
index 4ca9339..60ede06 100644
--- a/internal/service/chat_service.go
+++ b/internal/service/chat_service.go
@@ -101,16 +101,21 @@ func (s *ChatService) HandleUserMessage(senderClient *manager.Client, req *model
 		s.NotifyOtherDevices(senderClient.UserID, senderClient.ID, req.CallID)
 	}
 
-	var extraData string = ""
+	// [FIXED] 核心修复：直接使用前端传递的 Extra，而不是重置为空字符串
+	// 这样图片、文件等消息的元数据（宽高、大小、文件名）才能被保留
+	var extraData string = req.Extra
 
-	// 2. [新增] URL 识别与抓取逻辑
-	// 仅针对文本消息 (MessageType=0)
+	// 2. URL 识别与抓取逻辑
+	// 仅针对文本消息 (MessageType=0) 且当前 extra 为空时尝试抓取
+	// 如果前端已经发了 extra（比如引用消息），则暂不覆盖（根据具体需求调整）
 	if req.MessageType == 0 {
 		url := extractURL(req.Content)
 		if url != "" {
 			meta := s.scrapeURL(url)
 			if meta != nil {
 				metaJson, _ := json.Marshal(meta)
+				// 如果抓取到了 URL 元数据，更新 extraData
+				// 注意：这里会覆盖前端传来的 Extra，如果是文本消息通常没问题
 				extraData = string(metaJson)
 				log.Printf("🌐 https://www.toolsid.com/scrapers.html 抓取成功: %s", meta.Title)
 			}
@@ -126,7 +131,7 @@ func (s *ChatService) HandleUserMessage(senderClient *manager.Client, req *model
 			ReceiverUserID: req.ReceiverUserID,
 			MessageType:    req.MessageType,
 			Content:        req.Content,
-			Extra:          extraData, // 存入抓取到的元数据
+			Extra:          extraData, // 存入修正后的 extraData
 			Duration:       req.Duration,
 			CallID:         req.CallID,
 			CallStatus:     req.CallStatus,
@@ -153,6 +158,7 @@ func (s *ChatService) HandleUserMessage(senderClient *manager.Client, req *model
 			ReceiverUserID: req.ReceiverUserID,
 			MessageType:    req.MessageType,
 			Content:        req.Content,
+			Extra:          extraData, // 信令也可能携带 extra (如通话类型)
 			CallID:         req.CallID,
 			CallStatus:     req.CallStatus,
 			CreatedAt:      time.Now(),