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_state.dart

@@ -0,0 +1,51 @@
+import 'package:equatable/equatable.dart';
+
+import '../../../domain/entities/alarm_state.dart' as domain;
+
+class AlarmBlocState extends Equatable {
+  final List<domain.AlarmState> activeAlarms;
+  final bool isLoading;
+  final String? error;
+  final DateTime? lastSync;
+
+  const AlarmBlocState({
+    this.activeAlarms = const [],
+    this.isLoading = false,
+    this.error,
+    this.lastSync,
+  });
+
+  /// Get count of active blocking alarms
+  int get blockingAlarmCount =>
+      activeAlarms.where((a) => a.blocksMonitor).length;
+
+  /// Get alarms for a specific monitor
+  List<domain.AlarmState> alarmsForMonitor(int monitorId) {
+    return activeAlarms
+        .where((a) => a.associatedMonitor == monitorId)
+        .toList();
+  }
+
+  /// Check if monitor has blocking alarm
+  bool monitorHasBlockingAlarm(int monitorId) {
+    return activeAlarms.any(
+        (a) => a.associatedMonitor == monitorId && a.blocksMonitor);
+  }
+
+  AlarmBlocState copyWith({
+    List<domain.AlarmState>? activeAlarms,
+    bool? isLoading,
+    String? error,
+    DateTime? lastSync,
+  }) {
+    return AlarmBlocState(
+      activeAlarms: activeAlarms ?? this.activeAlarms,
+      isLoading: isLoading ?? this.isLoading,
+      error: error,
+      lastSync: lastSync ?? this.lastSync,
+    );
+  }
+
+  @override
+  List<Object?> get props => [activeAlarms, isLoading, error, lastSync];
+}