feat(web): standardize loading on shared skeleton recipes; retire '…' + empty status divs (#53)

web/src/auth/require-auth.tsx

@@ -1,11 +1,12 @@
 import { Navigate, Outlet } from "react-router-dom";
 
 import { useMe } from "../api/queries";
+import { AppShellSkeleton } from "@/components/ui/skeletons";
 
 export function RequireAuth() {
   const { data: user, isLoading } = useMe();
 
-  if (isLoading) return <div role="status" aria-label="loading" />;
+  if (isLoading) return <AppShellSkeleton />;
 
   if (!user) return <Navigate to="/login" replace />;