Refactor MainActivity to use MainScreen with scaffold and navigation setup

app/src/main/java/de/jadehs/strassenschadenpro2/MainActivity.kt

@@ -36,20 +36,7 @@ class MainActivity : ComponentActivity() {
         enableEdgeToEdge()
         setContent {
             StrassenSchadenPro2Theme {
-                //var count = 0
-                var count by remember { mutableStateOf(0) }
-                Column(modifier = Modifier.fillMaxSize(),
-                    verticalArrangement = Arrangement.Center,
-                    horizontalAlignment = Alignment.CenterHorizontally) {
-                    Text(text= count.toString())
-                    Button(onClick = {
-                        count++
-                        Log.d("MainActivity", "Button clicked $count")
-
-                    }) {
-                        Text("Click me")
-                    }
-                }
+                MainScreen()
             }
         }
     }

app/src/main/java/de/jadehs/strassenschadenpro2/MainScreen.kt

@@ -0,0 +1,31 @@
+package de.jadehs.strassenschadenpro2
+
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Place
+import androidx.compose.material3.NavigationBar
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+
+@Composable
+fun MainScreen(modifier: Modifier = Modifier) {
+
+    val navItemList = listOf(
+        NavItem("Karte",Icons.Default.Place)
+    )
+
+    Scaffold(modifier = Modifier.fillMaxSize(),
+        bottomBar = {
+            NavigationBar {
+
+            }
+        }) {
+        innerPadding ->
+        Text(text = "Hello World",
+        modifier = Modifier.padding(innerPadding)
+        )
+    }
+}

app/src/main/java/de/jadehs/strassenschadenpro2/NavItem.kt

@@ -0,0 +1,8 @@
+package de.jadehs.strassenschadenpro2
+
+import androidx.compose.ui.graphics.vector.ImageVector
+
+data class NavItem(
+    val label: String,
+    val icon: ImageVector
+)