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/connection/connection_state.dart

@@ -0,0 +1,43 @@
+import 'package:equatable/equatable.dart';
+
+enum ConnectionOverallStatus { disconnected, connecting, connected, partial }
+
+class ConnectionState extends Equatable {
+  final ConnectionOverallStatus overallStatus;
+  final Map<String, bool> serverStatus;
+  final String? error;
+
+  const ConnectionState({
+    this.overallStatus = ConnectionOverallStatus.disconnected,
+    this.serverStatus = const {},
+    this.error,
+  });
+
+  /// Check if all servers are connected
+  bool get allConnected =>
+      serverStatus.isNotEmpty && serverStatus.values.every((v) => v);
+
+  /// Check if any server is connected
+  bool get anyConnected => serverStatus.values.any((v) => v);
+
+  /// Get count of connected servers
+  int get connectedCount => serverStatus.values.where((v) => v).length;
+
+  /// Get count of total servers
+  int get totalCount => serverStatus.length;
+
+  ConnectionState copyWith({
+    ConnectionOverallStatus? overallStatus,
+    Map<String, bool>? serverStatus,
+    String? error,
+  }) {
+    return ConnectionState(
+      overallStatus: overallStatus ?? this.overallStatus,
+      serverStatus: serverStatus ?? this.serverStatus,
+      error: error,
+    );
+  }
+
+  @override
+  List<Object?> get props => [overallStatus, serverStatus, error];
+}