fix: Improve keyboard input handling (#102)

Co-authored-by: PartyDonut <PartyDonut@users.noreply.github.com>

lib/util/input_handler.dart

@@ -0,0 +1,35 @@
+import 'package:flutter/material.dart';
+
+class InputHandler extends StatefulWidget {
+  final bool autoFocus;
+  final KeyEventResult Function(FocusNode node, KeyEvent event)? onKeyEvent;
+  final Widget child;
+  const InputHandler({
+    required this.child,
+    this.autoFocus = true,
+    this.onKeyEvent,
+    super.key,
+  });
+
+  @override
+  State<InputHandler> createState() => _InputHandlerState();
+}
+
+class _InputHandlerState extends State<InputHandler> {
+  final focusNode = FocusNode();
+
+  @override
+  Widget build(BuildContext context) {
+    return Focus(
+      autofocus: widget.autoFocus,
+      focusNode: focusNode,
+      onFocusChange: (value) {
+        if (!focusNode.hasFocus) {
+          focusNode.requestFocus();
+        }
+      },
+      onKeyEvent: widget.onKeyEvent,
+      child: widget.child,
+    );
+  }
+}