添加优惠券功能 & 更新折扣管理的接口

src/app/(root)/navigation.tsx

@@ -16,7 +16,7 @@ import {
   Shield,
   ShoppingBag,
   SquarePercent,
-  SquarePercentIcon,
+  TicketPercent,
   Users,
 } from "lucide-react"
 import Link from "next/link"
@@ -187,9 +187,9 @@ export default function Navigation() {
               {/* 客户 */}
               <NavGroup title="客户">
                 <NavItem href="/user" icon={Users} label="客户认领" />
+                <NavItem href="/cust" icon={ContactRound} label="客户管理" />
                 <NavItem href="/trade" icon={Activity} label="交易明细" />
                 <NavItem href="/billing" icon={DollarSign} label="账单详情" />
-                <NavItem href="/cust" icon={ContactRound} label="客户管理" />
               </NavGroup>
 
               <NavSeparator />
@@ -202,6 +202,7 @@ export default function Navigation() {
                   icon={SquarePercent}
                   label="折扣管理"
                 />
+                <NavItem href="/coupon" icon={TicketPercent} label="优惠券" />
                 <NavItem href="/resources" icon={Package} label="套餐管理" />
                 <NavItem href="/batch" icon={ClipboardList} label="提取记录" />
                 <NavItem href="/channel" icon={Code} label="IP管理" />