rename FlashWrapper to HighlightWrapper

lib/widgets/flash_wrapper.dart

@@ -1,20 +0,0 @@
-import "package:flutter/material.dart";
-
-class FlashWrapper extends StatelessWidget {
-  final Widget child;
-  final bool isFlashing;
-  const FlashWrapper(this.child, {this.isFlashing = false, super.key});
-
-  @override
-  Widget build(BuildContext context) => ClipRRect(
-    borderRadius: .all(.circular(12)),
-    child: AnimatedContainer(
-      padding: isFlashing ? .all(8) : .all(0),
-      color: isFlashing
-          ? Theme.of(context).colorScheme.onSurface.withAlpha(50)
-          : Colors.transparent,
-      duration: .new(milliseconds: 250),
-      child: child,
-    ),
-  );
-}