chore: temporarily disable login/signup and profile routes

Comment out auth navigation in Header and MobileNav.
Add redirect-to-home layout guards on /auth/* and /profile/* routes.

web/src/lib/components/layout/Header.svelte

@@ -31,6 +31,7 @@
 		<!-- Desktop nav -->
 		<nav class="hidden items-center gap-6 md:flex">
 			<a href="/" class="text-sm font-medium text-primary-200 hover:text-white">Suche</a>
+			<!-- TODO: re-enable auth nav when login/signup is ready
 			{#if user}
 				<a href="/profile" class="text-sm font-medium text-primary-200 hover:text-white">Profil</a>
 				<form method="POST" action="/auth/abmelden">
@@ -44,6 +45,7 @@
 					Anmelden
 				</a>
 			{/if}
+			-->
 			<ThemeToggle />
 		</nav>
 

web/src/lib/components/layout/MobileNav.svelte

@@ -14,6 +14,7 @@
 		<a href="/" class="text-sm font-medium text-primary-200 hover:text-white" onclick={onclose}>
 			Suche
 		</a>
+		<!-- TODO: re-enable auth nav when login/signup is ready
 		{#if user}
 			<a href="/profile" class="text-sm font-medium text-primary-200 hover:text-white" onclick={onclose}>
 				Profil
@@ -29,5 +30,6 @@
 				Anmelden
 			</a>
 		{/if}
+		-->
 	</div>
 </nav>

web/src/routes/auth/+layout.server.ts

@@ -0,0 +1,7 @@
+// TODO: remove this redirect when login/signup is re-enabled
+import { redirect } from '@sveltejs/kit';
+import type { LayoutServerLoad } from './$types';
+
+export const load: LayoutServerLoad = () => {
+	redirect(302, '/');
+};

web/src/routes/profile/+layout.server.ts

@@ -0,0 +1,7 @@
+// TODO: remove this redirect when login/signup is re-enabled
+import { redirect } from '@sveltejs/kit';
+import type { LayoutServerLoad } from './$types';
+
+export const load: LayoutServerLoad = () => {
+	redirect(302, '/');
+};