✨ feat: add connections page, rename dashboard page to overview

src/components/layout/app-sidebar.tsx

@@ -24,13 +24,14 @@ import {
 } from '@/components/ui/sidebar'
 import { Badge } from '@/components/ui/badge'
 
-export type NavTab = 'dashboard' | 'links' | 'routes' | 'topology' | 'interfaces' | 'settings'
+export type NavTab = 'overview' | 'connections' | 'routes' | 'topology' | 'interfaces' | 'settings'
 
 interface AppSidebarProps {
   currentTab: NavTab
   onSelectTab: (tab: NavTab) => void
   onlineDevices?: number
   linksCount?: number
+  establishedLinksCount?: number
   isConnected?: boolean
 }
 
@@ -39,20 +40,21 @@ export function AppSidebar({
   onSelectTab,
   onlineDevices = 0,
   linksCount = 0,
+  establishedLinksCount = 0,
   isConnected = false,
 }: AppSidebarProps) {
   const navItems = [
     {
-      id: 'dashboard' as NavTab,
-      title: '仪表盘总览',
+      id: 'overview' as NavTab,
+      title: '总览',
       icon: LayoutDashboard,
       badge: isConnected ? 'Live' : undefined,
     },
     {
-      id: 'links' as NavTab,
-      title: '线路与链路',
+      id: 'connections' as NavTab,
+      title: '连接',
       icon: Network,
-      badge: linksCount > 0 ? `${linksCount}` : undefined,
+      badge: linksCount > 0 ? `${establishedLinksCount}/${linksCount}` : undefined,
     },
     {
       id: 'routes' as NavTab,