Fix loading state index

app/index.tsx

@@ -1,24 +1,44 @@
-import {Redirect, Stack} from 'expo-router';
+import React, {useEffect} from 'react';
+import {Redirect, router, useRouter} from 'expo-router';
 
 import {ThemedText} from '@/components/ThemedText';
 import {ThemedView} from '@/components/ThemedView';
 import {useToken} from '@/context/AppProvider';
-import React, {useEffect} from 'react';
+import {Request} from '@/services/request';
 
-export default async function OnboardStartScreen() {
-  const {token, isLoading} = useToken();
 
-  if (isLoading) {
-    return (
+export default function OnboardStartScreen() {
+  const { token, isLoading } = useToken();
+  const router = useRouter();
+
+  const loadingScreen = () => (
     <ThemedView>
       <ThemedText>Laden...</ThemedText>
     </ThemedView>
   );
+
+  useEffect(() => {
+    const fetchData = async () => {
+      const response = await Request.post('sessions/get', { token: token });
+      if (response.success) {
+        router.replace('/(tabs)');
+      } else {
+        router.replace('/(onboarding)/start');
+      }
+    };
+
+    if (!isLoading && token) {
+      fetchData();
+    }
+  }, [isLoading, token, router]);
+
+  if (isLoading) {
+    return loadingScreen();
   }
 
   if (!token) {
-    return <Redirect href="/(onboarding)/start"/>;
+    return <Redirect href="/(onboarding)/start" />;
   }
 
-  return <Redirect href="/(tabs)"/>;
+  return loadingScreen();
 }