feat: 添加订单管理功能，支持跨租户分页查询，优化订单列表展示及查询条件

frontend/superadmin/src/service/OrderService.js

@@ -1,8 +1,75 @@
 import { requestJson } from './apiClient';
 
+function normalizeItems(items) {
+    if (Array.isArray(items)) return items;
+    if (items && typeof items === 'object') return [items];
+    return [];
+}
+
 export const OrderService = {
+    async listOrders({
+        page,
+        limit,
+        id,
+        tenant_id,
+        tenant_code,
+        tenant_name,
+        user_id,
+        username,
+        content_id,
+        content_title,
+        type,
+        status,
+        created_at_from,
+        created_at_to,
+        paid_at_from,
+        paid_at_to,
+        amount_paid_min,
+        amount_paid_max,
+        sortField,
+        sortOrder
+    } = {}) {
+        const iso = (d) => {
+            if (!d) return undefined;
+            const date = d instanceof Date ? d : new Date(d);
+            if (Number.isNaN(date.getTime())) return undefined;
+            return date.toISOString();
+        };
+
+        const query = {
+            page,
+            limit,
+            id,
+            tenant_id,
+            tenant_code,
+            tenant_name,
+            user_id,
+            username,
+            content_id,
+            content_title,
+            type,
+            status,
+            created_at_from: iso(created_at_from),
+            created_at_to: iso(created_at_to),
+            paid_at_from: iso(paid_at_from),
+            paid_at_to: iso(paid_at_to),
+            amount_paid_min,
+            amount_paid_max
+        };
+        if (sortField && sortOrder) {
+            if (sortOrder === 1) query.asc = sortField;
+            if (sortOrder === -1) query.desc = sortField;
+        }
+
+        const data = await requestJson('/super/v1/orders', { query });
+        return {
+            page: data?.page ?? page ?? 1,
+            limit: data?.limit ?? limit ?? 10,
+            total: data?.total ?? 0,
+            items: normalizeItems(data?.items)
+        };
+    },
     async getOrderStatistics() {
         return requestJson('/super/v1/orders/statistics');
     }
 };
-