Merge asset UI rollback into main, retaining inventory details and AI

src/components/Shell.tsx

@@ -161,13 +161,19 @@ export function Shell({ modules }: { modules: ModuleConfig[] }) {
               <image href="/lingniu-logo-light.svg" width="150" height="36" style={{ filter: 'brightness(0) invert(1)' }} />
             </svg>
           </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' }}>
-
+        {!isHydrogenPrototype && (
+        <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>