feat(admin): full integration of order, product, and finance modules with real RPC data streams

services/admin/financeService.uts

@@ -149,3 +149,18 @@ export async function fetchUserBillList(
     items: (data.items as Array<UserBillRecord>) ?? ([] as Array<UserBillRecord>)
   } as PagedResult<UserBillRecord>
 }
+
+/**
+ * 获取账单汇总统计
+ */
+export async function fetchFinanceBillSummary(
+  startTime : string,
+  endTime : string,
+  interval : string = 'day'
+) : Promise<Array<any>> {
+  return (await rpcOrEmptyArray('rpc_admin_finance_bill_summary', {
+    p_start_time: startTime,
+    p_end_time: endTime,
+    p_interval: interval
+  } as any)) as any
+}