enhance: add shadow to TopBars

feature/records/src/commonMain/kotlin/bzh/ajaury/chombev/player/ui/PlayerScreen.kt

@@ -24,6 +24,7 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.shadow
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
@@ -104,6 +105,7 @@ fun PlayerScreen(
     Scaffold(
         topBar = {
             TopAppBar(
+                modifier = Modifier.shadow(elevation = 2.dp),
                 title = {
                     Row(
                         verticalAlignment = Alignment.CenterVertically,