Initial commit: COPILOT D6 Flutter keyboard controller

Flutter web app replacing legacy WPF CCTV surveillance keyboard controller.
Includes wall overview, section view with monitor grid, camera input,
PTZ control, alarm/lock/sequence BLoCs, and legacy-matching UI styling.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

copilot_keyboard/test/widget_test.dart

@@ -0,0 +1,13 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:copilot_keyboard/app.dart';
+
+void main() {
+  testWidgets('App should display keyboard screen', (WidgetTester tester) async {
+    // Build our app and trigger a frame.
+    await tester.pumpWidget(const CopilotKeyboardApp());
+
+    // Verify app title is displayed
+    expect(find.text('COPILOT Keyboard'), findsOneWidget);
+  });
+}