fase(10): frontend shadcn-ui shell with auth

frontend/src/components/layout/AppLayout.tsx

@@ -0,0 +1,22 @@
+import { Outlet } from 'react-router-dom'
+import { SidebarProvider } from '@/components/ui/sidebar'
+import { AppSidebar } from './AppSidebar'
+import { TopBar } from './TopBar'
+import { CommandPalette } from './CommandPalette'
+
+export function AppLayout() {
+  return (
+    <SidebarProvider>
+      <div className="flex h-screen w-full overflow-hidden bg-background">
+        <AppSidebar />
+        <div className="flex flex-col flex-1 overflow-hidden">
+          <TopBar />
+          <main className="flex-1 overflow-auto p-6">
+            <Outlet />
+          </main>
+        </div>
+      </div>
+      <CommandPalette />
+    </SidebarProvider>
+  )
+}