fix(auth): correctly redirect the user to the last visited page after login

Resolves https://kolaente.dev/vikunja/frontend/issues/3682

src/helpers/saveLastVisited.ts

@@ -1,6 +1,10 @@
 const LAST_VISITED_KEY = 'lastVisited'
 
-export const saveLastVisited = (name: string, params: object, query: object) => {
+export const saveLastVisited = (name: string | undefined, params: object, query: object) => {
+	if (typeof name === 'undefined') {
+		return
+	}
+	
 	localStorage.setItem(LAST_VISITED_KEY, JSON.stringify({name, params, query}))
 }
 
@@ -9,7 +13,7 @@ export const getLastVisited = () => {
 	if (lastVisited === null) {
 		return null
 	}
-	
+
 	return JSON.parse(lastVisited)
 }