feat: group display on schedule screen

app/src/main/java/agzam/vyatsu/ui/schedule/ScheduleScreen.kt

@@ -44,7 +44,7 @@ fun ScheduleScreen(viewModel: ScheduleViewModel, onSwitchGroup: () -> Unit) {
 
     Column(Modifier.fillMaxSize()) {
         TopAppBar(
-            title = { Text("Расписание") },
+            title = { Text(state.groupName ?: "Расписание", style = MaterialTheme.typography.titleMedium) },
             actions = {
                 TextButton(onClick = { onSwitchGroup() }) {
                     Text("Сменить группу")
@@ -53,7 +53,7 @@ fun ScheduleScreen(viewModel: ScheduleViewModel, onSwitchGroup: () -> Unit) {
                     Icon(Icons.Default.Refresh, contentDescription = "Обновить")
                 }
             },
-            windowInsets = WindowInsets.systemBars.only(androidx.compose.foundation.layout.WindowInsetsSides.Top)
+            windowInsets = WindowInsets(0.dp)
         )
         Column(Modifier.fillMaxSize().padding(horizontal =  16.dp, vertical = 0.dp)) {
             when {