tweaks

Signed-off-by: dom <githubaccount56556@proton.me>

lib/common/widgets/back_detector.dart

@@ -0,0 +1,42 @@
+import 'package:flutter/gestures.dart' show kBackMouseButton;
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart' show KeyDownEvent;
+
+class BackDetector extends StatelessWidget {
+  const BackDetector({
+    super.key,
+    required this.onBack,
+    required this.child,
+  });
+
+  final Widget child;
+
+  final VoidCallback onBack;
+
+  @override
+  Widget build(BuildContext context) {
+    return Focus(
+      canRequestFocus: false,
+      onKeyEvent: _onKeyEvent,
+      child: Listener(
+        behavior: .translucent,
+        onPointerDown: _onPointerDown,
+        child: child,
+      ),
+    );
+  }
+
+  KeyEventResult _onKeyEvent(FocusNode node, KeyEvent event) {
+    if (event.logicalKey == .escape && event is KeyDownEvent) {
+      onBack();
+      return .handled;
+    }
+    return .ignored;
+  }
+
+  void _onPointerDown(PointerDownEvent event) {
+    if (event.buttons == kBackMouseButton) {
+      onBack();
+    }
+  }
+}