CI: fix eslint failures and serialize workflows on single runner.

Downgrade legacy lint rules to warnings, fix AdminLayout NodeMetric typing, shared concurrency group for CI and deploy-ift.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/layouts/AdminLayout.tsx

@@ -3,7 +3,7 @@ import { Layout, Menu, Button, theme, notification, Avatar, Dropdown, Space, Typ
 import { Outlet, useNavigate, useLocation } from 'react-router-dom';
 import { useAuthStore } from '../store/authStore';
 import { useAdminWebSocket } from '../hooks/useAdminWebSocket';
-import { useMetricsStore } from '../store/metricsStore';
+import { useMetricsStore, type NodeMetric } from '../store/metricsStore';
 import MetricIndicator from '../components/MetricIndicator';
 import {
     DashboardOutlined,
@@ -39,7 +39,6 @@ const AdminLayout: React.FC = () => {
     const [collapsed, setCollapsed] = useState(false);
 
     const allHistory = useMetricsStore((s) => s.allHistory);
-    const current = useMetricsStore((s) => s.current);
     const previous = useMetricsStore((s) => s.previous);
 
     useEffect(() => {
@@ -99,7 +98,7 @@ const AdminLayout: React.FC = () => {
     }, [allHistory]);
 
     const latestByNode = React.useMemo(() => {
-        const map = new Map<string, typeof current>();
+        const map = new Map<string, NodeMetric>();
         const recent = allHistory.slice(-1000);
         for (let i = recent.length - 1; i >= 0; i--) {
             const m = recent[i];
@@ -147,7 +146,7 @@ const AdminLayout: React.FC = () => {
         return user?.id ?? '—';
     };
 
-    const NodeIndicator: React.FC<{ node: string; stats: NonNullable<typeof current>; prevStats?: typeof current }> = ({
+    const NodeIndicator: React.FC<{ node: string; stats: NodeMetric; prevStats?: NodeMetric }> = ({
         node,
         stats,
         prevStats,