fix: cookie-auth-issues (#365)

* fix session clearing on error

* use singleton context to manage user state

* implement remember-me functionality

* fix errors

* fix more errors

frontend/composables/use-api.ts

@@ -34,6 +34,7 @@ export function useUserApi(): UserClient {
   requests.addResponseInterceptor(logger);
   requests.addResponseInterceptor(r => {
     if (r.status === 401) {
+      console.error("unauthorized request, invalidating session");
       authCtx.invalidateSession();
     }
   });