feat(channel): 支持安全删除渠道并保留历史数据

server/internal/handler/channel.go

@@ -152,6 +152,22 @@ func (h *ChannelHandler) Update(c *gin.Context) {
 	middleware.JSON(c, toChannelView(channel))
 }
 
+func (h *ChannelHandler) Delete(c *gin.Context) {
+	if !requireTenantAdmin(c) {
+		return
+	}
+	var channel model.Channel
+	if err := model.DB.Where("id = ? AND tenant_id = ?", c.Param("id"), middleware.GetTenantID(c)).First(&channel).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"code": 404, "message": "渠道不存在"})
+		return
+	}
+	if err := model.DB.Delete(&channel).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"code": 500, "message": "删除失败"})
+		return
+	}
+	middleware.JSON(c, gin.H{"id": channel.ID, "deleted": true})
+}
+
 type createChannelReq struct {
 	Type       string `json:"type" binding:"required"`
 	Name       string `json:"name"`