perf: optimize state management and clean up styling in ReactionsSettingsScreen

- Change `items` state initialization to use `toList()` instead of `toMutableList()` to ensure a fresh immutable snapshot from the flow.
- Reformat chained modifiers in `DraggableItem` for better readability.

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/settings/ReactionsSettingsScreen.kt

@@ -87,7 +87,7 @@ fun ReactionsSettingsScreen(
 @Composable
 fun ReactionsSettingsContent(accountViewModel: AccountViewModel) {
     val reactionRowItems by accountViewModel.reactionRowItemsFlow().collectAsStateWithLifecycle()
-    var items by remember(reactionRowItems) { mutableStateOf(reactionRowItems.toMutableList()) }
+    var items by remember(reactionRowItems) { mutableStateOf(reactionRowItems.toList()) }
 
     fun save(newItems: List<ReactionRowItem>) {
         items = newItems.toMutableList()
@@ -238,16 +238,14 @@ private fun ReactionRowItemCard(
                 .fillMaxWidth()
                 .onGloballyPositioned { coordinates ->
                     onMeasured(coordinates.size.height.toFloat())
-                }
-                .graphicsLayer {
+                }.graphicsLayer {
                     translationY = dragOffsetY
                     shadowElevation = elevation
                     if (isDragging) {
                         scaleX = 1.02f
                         scaleY = 1.02f
                     }
-                }
-                .padding(vertical = 8.dp),
+                }.padding(vertical = 8.dp),
     ) {
         Row(
             modifier = Modifier.fillMaxWidth(),