refactor(data-kanban): 更新抵扣券金额字段名称和首单金额标签

- 将 totalDiscountAmount 字段重命名为 totalDiscountPurchaseAmount
- 更新数据指标中的 DiscountAmount 键为 DiscountPurchaseAmount
- 修改首单金额标签从"首单金额"为"首单立减金额"

src/api/operationsManage/data-kanban-api.ts

@@ -91,7 +91,7 @@ export interface DataBoardRealTimeVO {
   /**
    * 总抵扣券金额
    */
-  totalDiscountAmount?: number;
+  totalDiscountPurchaseAmount?: number;
   /**
    * 总企业专享价减
    */

src/views/operationsManage/data-kanban/index.vue

@@ -376,11 +376,17 @@ const refreshData = () => {
 const dataMetrics = [
   { type: "cdds", label: "充电度数", icon: "cdds.png", unit: "度", key: "ChargePower" },
   { type: "cdje", label: "充电金额", icon: "cdje.png", unit: "元", key: "ChargeAmount" },
-  { type: "dkqje", label: "抵扣券金额", icon: "dkqje.png", unit: "元", key: "DiscountAmount" },
+  {
+    type: "dkqje",
+    label: "抵扣券金额",
+    icon: "dkqje.png",
+    unit: "元",
+    key: "DiscountPurchaseAmount",
+  },
   { type: "fwfje", label: "服务费金额", icon: "fwfje.png", unit: "元", key: "ServiceFeeAmount" },
   { type: "tkje", label: "退款金额", icon: "tkje.png", unit: "元", key: "RefundAmount" },
   { type: "sfje", label: "实付金额", icon: "sfje.png", unit: "元", key: "ActualPayAmount" },
-  { type: "sdje", label: "首单金额", icon: "sdje.png", unit: "元", key: "FirstOrderAmount" },
+  { type: "sdje", label: "首单立减金额", icon: "sdje.png", unit: "元", key: "FirstOrderAmount" },
   { type: "yhqjm", label: "优惠券减免", icon: "yhqjm.png", unit: "元", key: "CouponAmount" },
   {
     type: "qyzxjj",