feat(platform): show link issue count in topbar

vehicle-data-platform/apps/web/src/layout/AppShell.tsx

@@ -26,11 +26,13 @@ const navItems = [
 
 export function AppShell({
   activePage,
+  linkIssueCount,
   onChange,
   onVehicleSearch,
   children
 }: {
   activePage: PageKey;
+  linkIssueCount: number | null;
   onChange: (page: PageKey) => void;
   onVehicleSearch: (keyword: string) => void;
   children: ReactNode;
@@ -76,7 +78,9 @@ export function AppShell({
             </Space>
             <Space spacing={12}>
               <Tag color="blue">生产环境</Tag>
-              <Button size="small" onClick={() => onChange('quality')}>链路监控</Button>
+              <Button size="small" onClick={() => onChange('quality')}>
+                {linkIssueCount == null ? '链路监控' : linkIssueCount > 0 ? `链路 ${linkIssueCount} 项关注` : '链路正常'}
+              </Button>
             </Space>
           </header>
           {children}