fix minor visual bugs

src/components/swipeableRowState.ts

@@ -0,0 +1,18 @@
+export type SwipeLaneSide = 'left' | 'right';
+
+/**
+ * Action lanes sit underneath an opaque row and should only exist visually
+ * while that row is moving toward them. Keeping them opaque at rest lets a
+ * parent scene-opacity animation reveal both half-width lane colors through the
+ * row on Android.
+ */
+export function swipeLaneOpacity(
+  translationX: number,
+  side: SwipeLaneSide
+): number {
+  'worklet';
+  if (!Number.isFinite(translationX)) return 0;
+  return side === 'left'
+    ? translationX > 1 ? 1 : 0
+    : translationX < -1 ? 1 : 0;
+}