Complete refactor to clean up project

lib/shared/input/pedal_shortcuts.dart

@@ -0,0 +1,40 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+/// Widget that handles Bluetooth pedal and keyboard shortcuts for page turning.
+///
+/// Listens for arrow key presses and invokes the appropriate callback:
+/// - Arrow Down/Right: Turn page forward
+/// - Arrow Up/Left: Turn page backward
+class PedalShortcuts extends StatelessWidget {
+  final Widget child;
+  final VoidCallback onPageForward;
+  final VoidCallback onPageBackward;
+
+  const PedalShortcuts({
+    super.key,
+    required this.child,
+    required this.onPageForward,
+    required this.onPageBackward,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return CallbackShortcuts(
+      bindings: _buildBindings(),
+      child: Focus(autofocus: true, child: child),
+    );
+  }
+
+  Map<ShortcutActivator, VoidCallback> _buildBindings() {
+    return {
+      // Forward navigation
+      const SingleActivator(LogicalKeyboardKey.arrowDown): onPageForward,
+      const SingleActivator(LogicalKeyboardKey.arrowRight): onPageForward,
+
+      // Backward navigation
+      const SingleActivator(LogicalKeyboardKey.arrowUp): onPageBackward,
+      const SingleActivator(LogicalKeyboardKey.arrowLeft): onPageBackward,
+    };
+  }
+}