first commit

ui/app/__root.tsx

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+import { Outlet, createRootRoute, redirect } from "@tanstack/react-router";
+
+/**
+ * Root route. Intentionally minimal — does NOT wrap children in providers,
+ * because the existing nested layouts (app/workspace/layout.tsx →
+ * ClientLayout, app/login/layout.tsx, app/pprof/layout.tsx) each set up
+ * their own ThemeProvider / ReduxProvider / NuqsAdapter / etc.
+ *
+ * If/when we consolidate provider setup, the providers can move here.
+ */
+export const Route = createRootRoute({
+	beforeLoad: ({ location }) => {
+		// Root index "/" → /login. The old app/page.tsx redirect lived here.
+		if (location.pathname === "/" || location.pathname === "") {
+			throw redirect({ to: "/login" });
+		}
+	},
+	component: RootComponent,
+});
+
+function RootComponent() {
+	return <Outlet />;
+}