支持动态更新管理员密码和下载次数逻辑完善，优化相关错误处理和配置更新流程

internal/api/public/pickup.go

@@ -68,7 +68,9 @@ func (h *PickupHandler) DownloadBatch(c *gin.Context) {
 	}
 
 	// 增加下载次数
-	h.batchService.IncrementDownloadCount(batch.ID)
+	if err := h.batchService.IncrementDownloadCount(batch.ID); err != nil {
+		fmt.Printf("[DownloadBatch] Failed to increment download count for batch %s: %v\n", batch.ID, err)
+	}
 }
 
 type PickupHandler struct {
@@ -106,8 +108,11 @@ func (h *PickupHandler) Pickup(c *gin.Context) {
 	}
 
 	if batch.Type == "text" {
-		h.batchService.IncrementDownloadCount(batch.ID)
-		batch.DownloadCount++
+		if err := h.batchService.IncrementDownloadCount(batch.ID); err != nil {
+			fmt.Printf("[Pickup] Failed to increment download count for batch %s: %v\n", batch.ID, err)
+		} else {
+			batch.DownloadCount++
+		}
 	}
 
 	c.JSON(http.StatusOK, model.SuccessResponse(PickupResponse{
@@ -163,11 +168,19 @@ func (h *PickupHandler) DownloadFile(c *gin.Context) {
 	defer reader.Close()
 
 	// 增加下载次数
-	h.batchService.IncrementDownloadCount(batch.ID)
+	if err := h.batchService.IncrementDownloadCount(batch.ID); err != nil {
+		// 记录错误但不中断下载过程
+		fmt.Printf("[Download] Failed to increment download count for batch %s: %v\n", batch.ID, err)
+	}
 
 	c.Header("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", item.OriginalName))
 	c.Header("Content-Type", item.MimeType)
 	c.Header("Content-Length", strconv.FormatInt(item.Size, 10))
 
+	// 如果是 HEAD 请求，只返回 Header
+	if c.Request.Method == http.MethodHead {
+		return
+	}
+
 	io.Copy(c.Writer, reader)
 }