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/irc/handlers.go

@@ -268,8 +268,10 @@ func (b *Birc) handlePrivMsg(client *girc.Client, event girc.Event) {
 		}
 	}
 
-	// Handle !kreconnect command: trigger Kosmi bridge reconnection
-	if strings.TrimSpace(rmsg.Text) == "!kreconnect" {
+	// Handle reconnect commands
+	trimmedText := strings.TrimSpace(rmsg.Text)
+	switch trimmedText {
+	case "!kreconnect":
 		b.Log.Infof("!kreconnect command from %s on %s", event.Source.Name, rmsg.Channel)
 		b.Remote <- config.Message{
 			Username: "system",
@@ -279,6 +281,26 @@ func (b *Birc) handlePrivMsg(client *girc.Client, event girc.Event) {
 			Event:    config.EventReconnectKosmi,
 		}
 		return
+	case "!jreconnect":
+		b.Log.Infof("!jreconnect command from %s on %s", event.Source.Name, rmsg.Channel)
+		b.Remote <- config.Message{
+			Username: "system",
+			Text:     "jreconnect",
+			Channel:  rmsg.Channel,
+			Account:  b.Account,
+			Event:    config.EventReconnectJackbox,
+		}
+		return
+	case "!reconnect":
+		b.Log.Infof("!reconnect command from %s on %s", event.Source.Name, rmsg.Channel)
+		b.Remote <- config.Message{
+			Username: "system",
+			Text:     "reconnect",
+			Channel:  rmsg.Channel,
+			Account:  b.Account,
+			Event:    config.EventReconnectAll,
+		}
+		return
 	}
 
 	// Handle !votes command: query current game vote tally