fix: render metrics and smooth route transitions

frontend/src/admin/AdminLayout.tsx

@@ -35,6 +35,11 @@ export default function AdminLayout() {
   const [collapsed, setCollapsed] = useState(false)
   const navigate = useNavigate()
   const location = useLocation()
+  function navigateWithTransition(path: string) {
+    const startViewTransition = (document as unknown as { startViewTransition?: (callback: () => void) => void }).startViewTransition
+    if (startViewTransition) startViewTransition(() => navigate(path))
+    else navigate(path)
+  }
   const outlet = useOutlet()
 
   const selectedKey = menuItems.find(
@@ -66,7 +71,7 @@ export default function AdminLayout() {
           </Text>
         </div>
         <Menu mode="inline" selectedKeys={[selectedKey]} items={menuItems}
-          onClick={({ key }) => navigate(key)}
+          onClick={({ key }) => navigateWithTransition(String(key))}
           style={{ border: 'none', marginTop: 8 }} />
       </Sider>
       <Layout>

frontend/src/admin/pages/LiveBoard.tsx

@@ -62,12 +62,16 @@ export default function LiveBoard() {
       message.error('看板数据加载失败')
     } finally {
       try {
-        const [metrics, nodeResponse] = await Promise.all([getSystemMetrics(), api.get<NodeMetric[]>('/nodes')])
-        setSystemMetrics(metrics)
-        setNodes(nodeResponse.data)
+        setSystemMetrics(await getSystemMetrics())
       } catch {
         setSystemMetrics(null)
       }
+      try {
+        const nodeResponse = await api.get<NodeMetric[]>('/nodes')
+        setNodes(nodeResponse.data)
+      } catch {
+        setNodes([])
+      }
       setLoading(false)
     }
   }

frontend/src/pageTransitions.css

@@ -1,28 +1,79 @@
 .app-route-transition,
 .admin-page-transition {
   min-height: 100%;
-  animation: page-fade-slide-in 220ms cubic-bezier(0.22, 1, 0.36, 1) both;
-  will-change: opacity, transform;
+  animation: page-soft-enter 260ms cubic-bezier(0.22, 1, 0.36, 1) both;
+  will-change: transform, opacity, filter;
+  background: transparent;
 }
 
 .admin-page-transition {
   transform-origin: top center;
 }
 
-@keyframes page-fade-slide-in {
+.route-loading {
+  min-height: 280px;
+  display: grid;
+  place-items: center;
+  border-radius: 24px;
+  background: linear-gradient(135deg, rgba(255,255,255,0.92), rgba(248,244,238,0.78));
+}
+
+.route-loading span {
+  width: 28px;
+  height: 28px;
+  border-radius: 999px;
+  border: 3px solid rgba(194, 105, 58, 0.2);
+  border-top-color: #C2693A;
+  animation: route-loading-spin 760ms linear infinite;
+}
+
+::view-transition-old(root),
+::view-transition-new(root) {
+  animation-duration: 220ms;
+  animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
+}
+
+::view-transition-old(root) {
+  animation-name: view-soft-out;
+}
+
+::view-transition-new(root) {
+  animation-name: view-soft-in;
+}
+
+@keyframes page-soft-enter {
   from {
-    opacity: 0;
-    transform: translateY(14px) scale(0.995);
+    opacity: 0.94;
+    transform: translate3d(18px, 0, 0) scale(0.998);
+    filter: blur(0.2px);
   }
   to {
     opacity: 1;
-    transform: translateY(0) scale(1);
+    transform: translate3d(0, 0, 0) scale(1);
+    filter: blur(0);
   }
 }
 
+@keyframes view-soft-out {
+  from { opacity: 1; transform: translate3d(0, 0, 0); }
+  to { opacity: 0.96; transform: translate3d(-8px, 0, 0); }
+}
+
+@keyframes view-soft-in {
+  from { opacity: 0.96; transform: translate3d(10px, 0, 0); }
+  to { opacity: 1; transform: translate3d(0, 0, 0); }
+}
+
+@keyframes route-loading-spin {
+  to { transform: rotate(360deg); }
+}
+
 @media (prefers-reduced-motion: reduce) {
   .app-route-transition,
-  .admin-page-transition {
+  .admin-page-transition,
+  .route-loading span,
+  ::view-transition-old(root),
+  ::view-transition-new(root) {
     animation: none;
   }
 }