Anmeldung und Kalendar

App.tsx

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+import { NavigationContainer } from "@react-navigation/native";
+import { createStackNavigator } from "@react-navigation/stack";
+import React from "react";
+import AuthScreen from "./src/screens/AuthScreen";
+import LoginScreen from "./src/screens/LoginScreen";
+import RegisterScreen from "./src/screens/RegisterScreen";
+import WelcomeScreen from "./src/screens/WelcomeScreen";
+import { RootStackParamList } from "./src/types";
+
+const Stack = createStackNavigator<RootStackParamList>();
+
+const App: React.FC = () => {
+  return (
+    <NavigationContainer>
+      <Stack.Navigator
+        initialRouteName="AuthScreen"
+        screenOptions={{
+          headerStyle: {
+            backgroundColor: "#007AFF",
+          },
+          headerTintColor: "#fff",
+          headerTitleStyle: {
+            fontWeight: "bold",
+          },
+        }}
+      >
+        <Stack.Screen
+          name="AuthScreen"
+          component={AuthScreen}
+          options={{
+            title: "Authentifizierung",
+            headerShown: false,
+          }}
+        />
+        <Stack.Screen
+          name="LoginScreen"
+          component={LoginScreen}
+          options={{
+            title: "Anmelden",
+          }}
+        />
+        <Stack.Screen
+          name="RegisterScreen"
+          component={RegisterScreen}
+          options={{
+            title: "Registrieren",
+          }}
+        />
+        <Stack.Screen
+          name="WelcomeScreen"
+          component={WelcomeScreen}
+          options={{
+            title: "Willkommen",
+            headerLeft: () => null,
+            gestureEnabled: false,
+          }}
+        />
+      </Stack.Navigator>
+    </NavigationContainer>
+  );
+};
+
+export default App;