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/customer/customer_controller.go

@@ -4,6 +4,7 @@ import (
 	"backend/internal/dto"
 	customerservice "backend/internal/service/customer"
 	"backend/utils"
+	"fmt"
 	"net/http"
 	"strconv"
 
@@ -120,3 +121,22 @@ func (ctrl *CustomerController) UpdateStatus(c *gin.Context) {
 	utils.LogAction(ctrl.db, c, "update_status", "customer", uint(id), "", "", "", "切换客户状态")
 	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "状态更新成功"})
 }
+
+// BatchDelete 批量删除客户（名下有 License 的自动跳过） // Logan.Li
+func (ctrl *CustomerController) 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", "customer", 0, "", "", "",
+		fmt.Sprintf("批量删除客户 %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})
+}