Prevent access to user pages when not logged in [v2] (#8904)

* do not throw error when navigating

* enhance: add loginRequired to router

This allows client pages to require logging in before displaying the
page, useful for example for user settings pages.

* add login requirements

Co-authored-by: Andreas Nedbal <git@pixelde.su>

packages/client/src/scripts/please-login.ts

@@ -17,5 +17,5 @@ export function pleaseLogin(path?: string) {
 		},
 	}, 'closed');
 
-	throw new Error('signin required');
+	if (!path) throw new Error('signin required');
 }