fix(assets): restore classic UI while retaining inventory subsets and AI

src/components/Shell.tsx

@@ -83,17 +83,11 @@ export function Shell({ modules }: { modules: ModuleConfig[] }) {
 
   const { user } = useAuth();
   const activeLabel = flatModules.find((module) => module.id === activeModule)?.label ?? '业务看板';
-  // 水印时间戳随会话推进刷新，避免长时间停留后时间失真。
-  const [watermarkNow, setWatermarkNow] = useState(() => Date.now());
-  useEffect(() => {
-    const timer = window.setInterval(() => setWatermarkNow(Date.now()), 30000);
-    return () => window.clearInterval(timer);
-  }, []);
   const watermarkText = useMemo(() => {
     const name = user?.userName || '未登录';
-    const time = new Date(watermarkNow).toLocaleString('zh-CN', { year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit', second: '2-digit', hour12: false }).replace(/\//g, '-');
+    const time = new Date().toLocaleString('zh-CN', { year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit', second: '2-digit', hour12: false }).replace(/\//g, '-');
     return `${name}-${time}`;
-  }, [user, watermarkNow]);
+  }, [user]);
 
   return (
     <DemoModeProvider enabled={false}>
@@ -157,13 +151,17 @@ export function Shell({ modules }: { modules: ModuleConfig[] }) {
           <div className="flex h-10 w-10 items-center justify-center rounded-xl bg-emerald-400/10 text-emerald-300 ring-1 ring-emerald-300/20" title={user?.userName || '当前用户'}>
             <ShieldCheck size={18} />
           </div>
-          <div className="max-w-16 truncate text-center text-[10px] font-bold text-slate-400">{user?.userName || '未登录'}</div>
+          <div className="max-w-16 truncate text-center text-[9px] font-bold text-slate-400">{user?.userName || '未登录'}</div>
         </div>
       </nav>
 
       {/* 内容区 */}
       <main className="min-w-0 flex-1 pb-16 md:ml-20 md:pb-0" style={{ overflowX: 'clip' }}>
-
+        <div className="pointer-events-none fixed left-20 right-0 top-0 z-20 hidden h-12 items-center border-b border-white/60 bg-white/55 px-6 text-xs font-bold text-slate-400 backdrop-blur-xl md:flex">
+          <span className="text-slate-600">羚牛氢能 BI</span>
+          <span className="mx-2 text-slate-300">/</span>
+          <span>{activeLabel}</span>
+        </div>
         <Suspense fallback={<div className="p-3 md:p-6"><LoadingState label="正在加载业务模块" /></div>}>
           {ActiveComponent && <ActiveComponent />}
         </Suspense>