feat(ui): wire all screens into NavHost with BottomSheet player

app/src/main/java/com/radiola/MainActivity.kt

@@ -4,14 +4,20 @@ import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.compose.foundation.layout.padding
-import androidx.compose.material3.Scaffold
+import androidx.compose.foundation.layout.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
 import androidx.compose.ui.Modifier
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
+import com.radiola.ui.favorites.FavoritesScreen
+import com.radiola.ui.history.HistoryScreen
 import com.radiola.ui.navigation.BottomNavBar
 import com.radiola.ui.navigation.NavDestinations
+import com.radiola.ui.player.PlayerBottomSheet
+import com.radiola.ui.settings.SettingsScreen
+import com.radiola.ui.stations.StationsScreen
 import com.radiola.ui.theme.RadiolaTheme
 import dagger.hilt.android.AndroidEntryPoint
 
@@ -23,6 +29,9 @@ class MainActivity : ComponentActivity() {
         setContent {
             RadiolaTheme {
                 val navController = rememberNavController()
+                val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+                var showPlayer by remember { mutableStateOf(false) }
+
                 Scaffold(
                     bottomBar = { BottomNavBar(navController) }
                 ) { paddingValues ->
@@ -32,17 +41,32 @@ class MainActivity : ComponentActivity() {
                         modifier = Modifier.padding(paddingValues)
                     ) {
                         composable(NavDestinations.Stations.route) {
-                            // TODO: StationsScreen
+                            StationsScreen(onStationClick = { showPlayer = true })
                         }
                         composable(NavDestinations.Favorites.route) {
-                            // TODO: FavoritesScreen
+                            FavoritesScreen(onStationClick = { showPlayer = true })
                         }
                         composable(NavDestinations.History.route) {
-                            // TODO: HistoryScreen
+                            HistoryScreen()
                         }
                         composable(NavDestinations.Settings.route) {
-                            // TODO: SettingsScreen
-                        }
+                            SettingsScreen()
+                        }
+                    }
+                }
+
+                if (showPlayer) {
+                    ModalBottomSheet(
+                        onDismissRequest = { showPlayer = false },
+                        sheetState = sheetState,
+                        containerColor = MaterialTheme.colorScheme.background
+                    ) {
+                        PlayerBottomSheet(
+                            station = null,
+                            track = null,
+                            isPlaying = false,
+                            onPlayPause = { }
+                        )
                     }
                 }
             }