fix: don't load app config and user on every route change

frontend/src/lib/utils/redirection-util.ts

@@ -0,0 +1,25 @@
+import type { User } from '$lib/types/user.type';
+
+// Returns the path to redirect to based on the current path and user authentication status
+// If no redirect is needed, it returns null
+export function getAuthRedirectPath(path: string, user: User | null) {
+	const isSignedIn = !!user;
+	const isAdmin = user?.isAdmin;
+
+	const isUnauthenticatedOnlyPath =
+		path == '/login' || path.startsWith('/login/') || path == '/lc' || path.startsWith('/lc/');
+	const isPublicPath = ['/authorize', '/device', '/health', '/healthz'].includes(path);
+	const isAdminPath = path == '/settings/admin' || path.startsWith('/settings/admin/');
+
+	if (!isUnauthenticatedOnlyPath && !isPublicPath && !isSignedIn) {
+		return '/login';
+	}
+
+	if (isUnauthenticatedOnlyPath && isSignedIn) {
+		return '/settings';
+	}
+
+	if (isAdminPath && !isAdmin) {
+		return '/settings';
+	}
+}