feat: 产品/客户/订单批量删除；接入 GeoLite2 城市库（地理分布/激活记录/审计日志显示归属地）；仪表盘趋势图美化

backend/internal/controller/order/order_controller.go

@@ -529,3 +529,22 @@ func (ctrl *OrderController) CheckPurchaseStatus(c *gin.Context) {
 	resp, _ := ctrl.svc.CheckPurchaseStatus(req.CustomerEmail, req.ProductID)
 	c.JSON(http.StatusOK, gin.H{"code": 0, "data": resp})
 }
+
+// BatchDelete 批量删除订单（已支付为财务凭证自动跳过） // Logan.Li
+func (ctrl *OrderController) BatchDelete(c *gin.Context) {
+	var req struct {
+		IDs []uint `json:"ids" binding:"required"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": "参数错误"})
+		return
+	}
+	result, err := ctrl.svc.BatchDelete(req.IDs)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"code": 1, "message": err.Error()})
+		return
+	}
+	utils.LogAction(ctrl.db, c, "batch_delete", "order", 0, "", "", "",
+		fmt.Sprintf("批量删除订单 %d 条，跳过 %d 条", result.Deleted, result.Skipped))
+	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "批量删除完成", "data": result})
+}