fix: 导航统一到 layout 顶部栏，各页面移除重复导航链接

- layout.tsx 的 NAV_ITEMS 增加「支付配置」入口
- 各 admin 页面的 actions 移除重复的导航 <a> 链接，仅保留功能按钮

src/app/admin/channels/page.tsx

@@ -57,10 +57,6 @@ function getTexts(locale: Locale) {
         invalidToken: 'Invalid admin token',
         title: 'Channel Management',
         subtitle: 'Configure and manage subscription channels',
-        orders: 'Orders',
-        navDashboard: 'Dashboard',
-        navPaymentConfig: 'Payment Config',
-        navSubscriptions: 'Subscriptions',
         refresh: 'Refresh',
         loading: 'Loading...',
         noChannels: 'No channels found',
@@ -114,10 +110,6 @@ function getTexts(locale: Locale) {
         invalidToken: '管理员凭证无效',
         title: '渠道管理',
         subtitle: '配置和管理订阅渠道',
-        orders: '订单管理',
-        navDashboard: '数据概览',
-        navPaymentConfig: '支付配置',
-        navSubscriptions: '订阅管理',
         refresh: '刷新',
         loading: '加载中...',
         noChannels: '暂无渠道',
@@ -469,13 +461,7 @@ function ChannelsContent() {
     }
   };
 
-  // ── Nav params ──
-
-  const navParams = new URLSearchParams();
-  if (token) navParams.set('token', token);
-  if (locale === 'en') navParams.set('lang', 'en');
-  if (isDark) navParams.set('theme', 'dark');
-  if (isEmbedded) navParams.set('ui_mode', 'embedded');
+  // ── Shared styles ──
 
   const btnBase = [
     'inline-flex items-center rounded-lg border px-3 py-1.5 text-xs font-medium transition-colors',
@@ -505,22 +491,6 @@ function ChannelsContent() {
       title={t.title}
       subtitle={t.subtitle}
       locale={locale}
-      actions={
-        <>
-          <a href={`/admin/dashboard?${navParams}`} className={btnBase}>
-            {t.navDashboard}
-          </a>
-          <a href={`/admin/orders?${navParams}`} className={btnBase}>
-            {t.orders}
-          </a>
-          <a href={`/admin/payment-config?${navParams}`} className={btnBase}>
-            {t.navPaymentConfig}
-          </a>
-          <a href={`/admin/subscriptions?${navParams}`} className={btnBase}>
-            {t.navSubscriptions}
-          </a>
-        </>
-      }
     >
       {/* Error banner */}
       {error && (

src/app/admin/dashboard/page.tsx

@@ -52,10 +52,6 @@ function DashboardContent() {
           title: 'Dashboard',
           subtitle: 'Recharge order analytics and insights',
           daySuffix: 'd',
-          navOrders: 'Orders',
-          navPaymentConfig: 'Payment Config',
-          navChannels: 'Channels',
-          navSubscriptions: 'Subscriptions',
           refresh: 'Refresh',
           loading: 'Loading...',
         }
@@ -68,10 +64,6 @@ function DashboardContent() {
           title: '数据概览',
           subtitle: '充值订单统计与分析',
           daySuffix: '天',
-          navOrders: '订单管理',
-          navPaymentConfig: '支付配置',
-          navChannels: '渠道管理',
-          navSubscriptions: '订阅管理',
           refresh: '刷新',
           loading: '加载中...',
         };
@@ -117,12 +109,6 @@ function DashboardContent() {
     );
   }
 
-  const navParams = new URLSearchParams();
-  navParams.set('token', token);
-  if (locale === 'en') navParams.set('lang', 'en');
-  if (theme === 'dark') navParams.set('theme', 'dark');
-  if (isEmbedded) navParams.set('ui_mode', 'embedded');
-
   const btnBase = [
     'inline-flex items-center rounded-lg border px-3 py-1.5 text-xs font-medium transition-colors',
     isDark
@@ -151,18 +137,6 @@ function DashboardContent() {
               {text.daySuffix}
             </button>
           ))}
-          <a href={`/admin/orders?${navParams}`} className={btnBase}>
-            {text.navOrders}
-          </a>
-          <a href={`/admin/payment-config?${navParams}`} className={btnBase}>
-            {text.navPaymentConfig}
-          </a>
-          <a href={`/admin/channels?${navParams}`} className={btnBase}>
-            {text.navChannels}
-          </a>
-          <a href={`/admin/subscriptions?${navParams}`} className={btnBase}>
-            {text.navSubscriptions}
-          </a>
           <button type="button" onClick={fetchData} className={btnBase}>
             {text.refresh}
           </button>

src/app/admin/layout.tsx

@@ -7,6 +7,7 @@ import { resolveLocale } from '@/lib/locale';
 const NAV_ITEMS = [
   { path: '/admin', label: { zh: '数据概览', en: 'Dashboard' } },
   { path: '/admin/orders', label: { zh: '订单管理', en: 'Orders' } },
+  { path: '/admin/payment-config', label: { zh: '支付配置', en: 'Payment Config' } },
   { path: '/admin/channels', label: { zh: '渠道管理', en: 'Channels' } },
   { path: '/admin/subscriptions', label: { zh: '订阅管理', en: 'Subscriptions' } },
 ];

src/app/admin/orders/page.tsx

@@ -74,10 +74,6 @@ function AdminContent() {
           loadDetailFailed: 'Failed to load order details',
           title: 'Order Management',
           subtitle: 'View and manage all recharge orders',
-          dashboard: 'Dashboard',
-          navPaymentConfig: 'Payment Config',
-          navChannels: 'Channels',
-          navSubscriptions: 'Subscriptions',
           refresh: 'Refresh',
           loading: 'Loading...',
           orderTypes: {
@@ -112,10 +108,6 @@ function AdminContent() {
           loadDetailFailed: '加载订单详情失败',
           title: '订单管理',
           subtitle: '查看和管理所有充值订单',
-          dashboard: '数据概览',
-          navPaymentConfig: '支付配置',
-          navChannels: '渠道管理',
-          navSubscriptions: '订阅管理',
           refresh: '刷新',
           loading: '加载中...',
           orderTypes: {
@@ -242,12 +234,6 @@ function AdminContent() {
   const orderTypes = ['', 'balance', 'subscription'];
   const orderTypeLabels: Record<string, string> = text.orderTypes;
 
-  const navParams = new URLSearchParams();
-  if (token) navParams.set('token', token);
-  if (locale === 'en') navParams.set('lang', 'en');
-  if (isDark) navParams.set('theme', 'dark');
-  if (isEmbedded) navParams.set('ui_mode', 'embedded');
-
   const btnBase = [
     'inline-flex items-center rounded-lg border px-3 py-1.5 text-xs font-medium transition-colors',
     isDark
@@ -265,18 +251,6 @@ function AdminContent() {
       locale={locale}
       actions={
         <>
-          <a href={`/admin/dashboard?${navParams}`} className={btnBase}>
-            {text.dashboard}
-          </a>
-          <a href={`/admin/payment-config?${navParams}`} className={btnBase}>
-            {text.navPaymentConfig}
-          </a>
-          <a href={`/admin/channels?${navParams}`} className={btnBase}>
-            {text.navChannels}
-          </a>
-          <a href={`/admin/subscriptions?${navParams}`} className={btnBase}>
-            {text.navSubscriptions}
-          </a>
           <button type="button" onClick={fetchOrders} className={btnBase}>
             {text.refresh}
           </button>

src/app/admin/page.tsx

@@ -52,10 +52,6 @@ function DashboardContent() {
           title: 'Dashboard',
           subtitle: 'Recharge order analytics and insights',
           daySuffix: 'd',
-          navOrders: 'Orders',
-          navPaymentConfig: 'Payment Config',
-          navChannels: 'Channels',
-          navSubscriptions: 'Subscriptions',
           refresh: 'Refresh',
           loading: 'Loading...',
         }
@@ -68,10 +64,6 @@ function DashboardContent() {
           title: '数据概览',
           subtitle: '充值订单统计与分析',
           daySuffix: '天',
-          navOrders: '订单管理',
-          navPaymentConfig: '支付配置',
-          navChannels: '渠道管理',
-          navSubscriptions: '订阅管理',
           refresh: '刷新',
           loading: '加载中...',
         };
@@ -117,12 +109,6 @@ function DashboardContent() {
     );
   }
 
-  const navParams = new URLSearchParams();
-  navParams.set('token', token);
-  if (locale === 'en') navParams.set('lang', 'en');
-  if (theme === 'dark') navParams.set('theme', 'dark');
-  if (isEmbedded) navParams.set('ui_mode', 'embedded');
-
   const btnBase = [
     'inline-flex items-center rounded-lg border px-3 py-1.5 text-xs font-medium transition-colors',
     isDark
@@ -151,18 +137,6 @@ function DashboardContent() {
               {text.daySuffix}
             </button>
           ))}
-          <a href={`/admin/orders?${navParams}`} className={btnBase}>
-            {text.navOrders}
-          </a>
-          <a href={`/admin/payment-config?${navParams}`} className={btnBase}>
-            {text.navPaymentConfig}
-          </a>
-          <a href={`/admin/channels?${navParams}`} className={btnBase}>
-            {text.navChannels}
-          </a>
-          <a href={`/admin/subscriptions?${navParams}`} className={btnBase}>
-            {text.navSubscriptions}
-          </a>
           <button type="button" onClick={fetchData} className={btnBase}>
             {text.refresh}
           </button>

src/app/admin/payment-config/page.tsx

@@ -15,10 +15,6 @@ function getTexts(locale: Locale) {
         invalidToken: 'Invalid admin token',
         title: 'Payment Config',
         subtitle: 'Configure recharge and payment settings',
-        dashboard: 'Dashboard',
-        orders: 'Orders',
-        channels: 'Channels',
-        subscriptions: 'Subscriptions',
         productNamePrefix: 'Product Name Prefix',
         productNameSuffix: 'Product Name Suffix',
         preview: 'Preview',
@@ -47,10 +43,6 @@ function getTexts(locale: Locale) {
         invalidToken: '管理员凭证无效',
         title: '支付配置',
         subtitle: '充值与支付相关配置',
-        dashboard: '数据概览',
-        orders: '订单管理',
-        channels: '渠道管理',
-        subscriptions: '订阅管理',
         productNamePrefix: '商品名前缀',
         productNameSuffix: '商品名后缀',
         preview: '预览',
@@ -212,21 +204,6 @@ function PaymentConfigContent() {
     );
   }
 
-  // ── Nav params ──
-
-  const navParams = new URLSearchParams();
-  if (token) navParams.set('token', token);
-  if (locale === 'en') navParams.set('lang', 'en');
-  if (isDark) navParams.set('theme', 'dark');
-  if (isEmbedded) navParams.set('ui_mode', 'embedded');
-
-  const btnBase = [
-    'inline-flex items-center rounded-lg border px-3 py-1.5 text-xs font-medium transition-colors',
-    isDark
-      ? 'border-slate-600 text-slate-200 hover:bg-slate-800'
-      : 'border-slate-300 text-slate-700 hover:bg-slate-100',
-  ].join(' ');
-
   // ── Shared input classes ──
 
   const inputCls = [
@@ -248,22 +225,6 @@ function PaymentConfigContent() {
       title={t.title}
       subtitle={t.subtitle}
       locale={locale}
-      actions={
-        <>
-          <a href={`/admin/dashboard?${navParams}`} className={btnBase}>
-            {t.dashboard}
-          </a>
-          <a href={`/admin/orders?${navParams}`} className={btnBase}>
-            {t.orders}
-          </a>
-          <a href={`/admin/channels?${navParams}`} className={btnBase}>
-            {t.channels}
-          </a>
-          <a href={`/admin/subscriptions?${navParams}`} className={btnBase}>
-            {t.subscriptions}
-          </a>
-        </>
-      }
     >
       {/* Error banner */}
       {error && (

src/app/admin/subscriptions/page.tsx

@@ -79,10 +79,6 @@ function buildText(locale: Locale) {
         requestFailed: 'Request failed',
         title: 'Subscription Management',
         subtitle: 'Manage subscription plans and user subscriptions',
-        orders: 'Order Management',
-        dashboard: 'Dashboard',
-        navPaymentConfig: 'Payment Config',
-        navChannels: 'Channels',
         refresh: 'Refresh',
         loading: 'Loading...',
         tabPlans: 'Plan Configuration',
@@ -163,10 +159,6 @@ function buildText(locale: Locale) {
         requestFailed: '请求失败',
         title: '订阅管理',
         subtitle: '管理订阅套餐与用户订阅',
-        orders: '订单管理',
-        dashboard: '数据概览',
-        navPaymentConfig: '支付配置',
-        navChannels: '渠道管理',
         refresh: '刷新',
         loading: '加载中...',
         tabPlans: '套餐配置',
@@ -608,12 +600,6 @@ function SubscriptionsContent() {
   }
 
   /* --- nav params --- */
-  const navParams = new URLSearchParams();
-  navParams.set('token', token);
-  if (locale === 'en') navParams.set('lang', 'en');
-  if (isDark) navParams.set('theme', 'dark');
-  if (isEmbedded) navParams.set('ui_mode', 'embedded');
-
   const btnBase = [
     'inline-flex items-center rounded-lg border px-3 py-1.5 text-xs font-medium transition-colors',
     isDark
@@ -700,18 +686,6 @@ function SubscriptionsContent() {
       locale={locale}
       actions={
         <>
-          <a href={`/admin/dashboard?${navParams}`} className={btnBase}>
-            {t.dashboard}
-          </a>
-          <a href={`/admin/orders?${navParams}`} className={btnBase}>
-            {t.orders}
-          </a>
-          <a href={`/admin/payment-config?${navParams}`} className={btnBase}>
-            {t.navPaymentConfig}
-          </a>
-          <a href={`/admin/channels?${navParams}`} className={btnBase}>
-            {t.navChannels}
-          </a>
           <button
             type="button"
             onClick={() => {