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_event.dart

@@ -0,0 +1,53 @@
+import 'package:equatable/equatable.dart';
+
+abstract class ConnectionEvent extends Equatable {
+  const ConnectionEvent();
+
+  @override
+  List<Object?> get props => [];
+}
+
+/// Connect to all servers
+class ConnectAll extends ConnectionEvent {
+  const ConnectAll();
+}
+
+/// Connect to a specific server
+class ConnectServer extends ConnectionEvent {
+  final String serverId;
+
+  const ConnectServer(this.serverId);
+
+  @override
+  List<Object?> get props => [serverId];
+}
+
+/// Disconnect from a specific server
+class DisconnectServer extends ConnectionEvent {
+  final String serverId;
+
+  const DisconnectServer(this.serverId);
+
+  @override
+  List<Object?> get props => [serverId];
+}
+
+/// Disconnect from all servers
+class DisconnectAll extends ConnectionEvent {
+  const DisconnectAll();
+}
+
+/// Retry failed connections
+class RetryConnections extends ConnectionEvent {
+  const RetryConnections();
+}
+
+/// Connection status updated (internal)
+class ConnectionStatusUpdated extends ConnectionEvent {
+  final Map<String, bool> status;
+
+  const ConnectionStatusUpdated(this.status);
+
+  @override
+  List<Object?> get props => [status];
+}