feat: 创建独立的授权管理页面

- 在左侧导航添加授权管理链接（代理管理后）

- 创建独立的授权管理页面，参考版本管理页面样式

- 添加统计卡片显示授权应用总数、活跃授权、授权卡类

- 创建添加/编辑授权页面

- 从代理编辑页面移除授权管理部分

- 添加路由配置

frontend/src/components/admin-sidebar/index.vue

@@ -1,5 +1,5 @@
 <script lang="ts" setup>
-import { Boxes, Code, CreditCard, DollarSign, FileLock, Gauge, GitBranch, HardDrive, Hash, Key, Mail, Megaphone, MessageSquare, Monitor, Network, Plug, ScrollText, Settings, Shield, Smartphone, Users, Variable } from 'lucide-vue-next'
+import { Boxes, Code, CreditCard, DollarSign, FileLock, Gauge, GitBranch, HardDrive, Hash, Key, KeyRound, Mail, Megaphone, MessageSquare, Monitor, Network, Plug, ScrollText, Settings, Shield, Smartphone, Users, Variable } from 'lucide-vue-next'
 import { computed, onMounted, onUnmounted, reactive } from 'vue'
 import { useI18n } from 'vue-i18n'
 
@@ -137,6 +137,11 @@ const navMain = computed(() => [
         url: '/admin/agents',
         icon: Network,
       },
+      {
+        title: t('nav.agentApps'),
+        url: '/admin/agent-apps',
+        icon: KeyRound,
+      },
     ],
   },
   {