Add connection resilience and reconnect commands for Kosmi and Jackbox

Kosmi WebSocket would silently die after hours/days with no reconnection.
Jackbox WebSocket failed to reconnect after API server restarts (stale JWT)
and leaked heartbeat goroutines on each reconnect cycle.

Kosmi changes:
- Add WebSocket ping/pong keepalive (30s ping, 90s read deadline)
- Send EventFailure on unexpected disconnect to trigger gateway reconnectBridge()
- Add intentionalDisconnect flag to prevent false failure events on clean shutdown
- Fix Disconnect() to be safe for reconnect cycles

Jackbox changes:
- Add read deadline (90s) to detect stale connections
- Fix heartbeat goroutine leak via per-connection listenDone channel
- Re-authenticate for fresh JWT before each reconnect attempt
- Add Manager.Reconnect() for on-demand teardown and rebuild

IRC commands:
- !kreconnect - reconnect Kosmi bridge
- !jreconnect - reconnect Jackbox WebSocket
- !reconnect  - reconnect all services (Kosmi + Jackbox)

Made-with: Cursor

bridge/jackbox/manager.go

@@ -242,6 +242,37 @@ func (m *Manager) monitorActiveSessions() {
 	}
 }
 
+// Reconnect tears down the existing WebSocket client and establishes a new
+// connection (re-authenticating for a fresh JWT). Safe to call even when
+// already disconnected.
+func (m *Manager) Reconnect() error {
+	if !m.enabled || !m.useWebSocket {
+		return fmt.Errorf("Jackbox WebSocket is not enabled")
+	}
+
+	m.log.Info("Forcing Jackbox WebSocket reconnection...")
+
+	// Tear down existing client
+	if m.wsClient != nil {
+		if err := m.wsClient.Close(); err != nil {
+			m.log.Errorf("Error closing existing WebSocket client: %v", err)
+		}
+		m.wsClient = nil
+	}
+
+	// Re-authenticate for a fresh JWT
+	if err := m.client.Authenticate(); err != nil {
+		return fmt.Errorf("re-authentication failed: %w", err)
+	}
+
+	// Rebuild the WebSocket client using the original callback
+	if m.messageCallback == nil {
+		return fmt.Errorf("no message callback registered")
+	}
+
+	return m.startWebSocketClient(m.messageCallback)
+}
+
 // GetClient returns the Jackbox API client (may be nil if disabled)
 func (m *Manager) GetClient() *Client {
 	return m.client