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/lib/presentation/blocs/alarm/alarm_event.dart

@@ -0,0 +1,39 @@
+import 'package:equatable/equatable.dart';
+
+import '../../../domain/entities/alarm_state.dart';
+
+abstract class AlarmEvent extends Equatable {
+  const AlarmEvent();
+
+  @override
+  List<Object?> get props => [];
+}
+
+/// Refresh alarms from server
+class RefreshAlarms extends AlarmEvent {
+  const RefreshAlarms();
+}
+
+/// Alarms updated (internal)
+class AlarmsUpdated extends AlarmEvent {
+  final List<AlarmState> alarms;
+
+  const AlarmsUpdated(this.alarms);
+
+  @override
+  List<Object?> get props => [alarms];
+}
+
+/// Acknowledge an alarm
+class AcknowledgeAlarm extends AlarmEvent {
+  final int alarmId;
+  final String serverId;
+
+  const AcknowledgeAlarm({
+    required this.alarmId,
+    required this.serverId,
+  });
+
+  @override
+  List<Object?> get props => [alarmId, serverId];
+}