feat: add superadmin member review and coupon ops

frontend/superadmin/src/service/CouponService.js

@@ -40,5 +40,55 @@ export const CouponService = {
             total: data?.total ?? 0,
             items: normalizeItems(data?.items)
         };
+    },
+    async createCoupon(tenantID, form = {}) {
+        if (!tenantID) throw new Error('tenantID is required');
+        return requestJson(`/super/v1/tenants/${tenantID}/coupons`, {
+            method: 'POST',
+            body: normalizeCouponForm(form)
+        });
+    },
+    async getCoupon(tenantID, couponID) {
+        if (!tenantID) throw new Error('tenantID is required');
+        if (!couponID) throw new Error('couponID is required');
+        return requestJson(`/super/v1/tenants/${tenantID}/coupons/${couponID}`);
+    },
+    async updateCoupon(tenantID, couponID, form = {}) {
+        if (!tenantID) throw new Error('tenantID is required');
+        if (!couponID) throw new Error('couponID is required');
+        return requestJson(`/super/v1/tenants/${tenantID}/coupons/${couponID}`, {
+            method: 'PUT',
+            body: normalizeCouponForm(form)
+        });
+    },
+    async grantCoupon(tenantID, couponID, userIDs = []) {
+        if (!tenantID) throw new Error('tenantID is required');
+        if (!couponID) throw new Error('couponID is required');
+        if (!Array.isArray(userIDs) || userIDs.length === 0) throw new Error('userIDs is required');
+        return requestJson(`/super/v1/tenants/${tenantID}/coupons/${couponID}/grant`, {
+            method: 'POST',
+            body: { user_ids: userIDs }
+        });
     }
 };
+
+function normalizeCouponForm(form) {
+    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();
+    };
+
+    return {
+        title: form.title,
+        description: form.description,
+        type: form.type,
+        value: form.value,
+        min_order_amount: form.min_order_amount,
+        max_discount: form.max_discount,
+        total_quantity: form.total_quantity,
+        start_at: iso(form.start_at),
+        end_at: iso(form.end_at)
+    };
+}