DocumentScreenPreview: use the app theme

app/src/main/java/org/mydomain/myscan/view/DocumentScreen.kt

@@ -65,6 +65,7 @@ import androidx.compose.ui.graphics.asImageBitmap
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import org.mydomain.myscan.ui.theme.MyScanTheme
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -223,6 +224,7 @@ private fun PageList(
 @Preview
 fun DocumentScreenPreview() {
     val context = LocalContext.current
+    MyScanTheme {
         DocumentScreen(
             pageIds = listOf(1, 2, 2, 2).map { "gallica.bnf.fr-bpt6k5530456s-$it.jpg" },
             imageLoader = { id ->
@@ -235,4 +237,5 @@ fun DocumentScreenPreview() {
             onSharePressed = {},
             onDeleteImage = { _ -> {} }
         )
+    }
 }