feat(platform): color topbar link health

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

@@ -24,6 +24,13 @@ const navItems = [
   { itemKey: 'quality', text: '数据质量', icon: <IconHistogram /> }
 ];
 
+function linkHealthClassName(count: number | null) {
+  if (count == null) {
+    return '';
+  }
+  return count > 0 ? 'vp-link-health-button-warning' : 'vp-link-health-button-ok';
+}
+
 export function AppShell({
   activePage,
   linkIssueCount,
@@ -78,7 +85,7 @@ export function AppShell({
             </Space>
             <Space spacing={12}>
               <Tag color="blue">生产环境</Tag>
-              <Button size="small" onClick={() => onChange('quality')}>
+              <Button size="small" className={linkHealthClassName(linkIssueCount)} onClick={() => onChange('quality')}>
                 {linkIssueCount == null ? '链路监控' : linkIssueCount > 0 ? `链路 ${linkIssueCount} 项关注` : '链路正常'}
               </Button>
             </Space>