fix: run TCP and WS IPC concurrently, fail only if either dies

Previously --ws-port started WS in a goroutine then called Run() which
blocked; if TCP IPC failed it took the whole process down even though WS
was up. Now both run in goroutines and the first error from either kills
the daemon.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cmd/daemon/main.go

@@ -82,15 +82,15 @@ func main() {
 		}
 	}
 
+	errCh := make(chan error, 2)
+
+	go func() { errCh <- ipc.Run(mgr, *ipcPort) }()
+
 	if *wsPort != 0 {
-		go func() {
-			if err := ipc.RunWS(mgr, *wsPort); err != nil {
-				log.Fatalf("ipc ws: %v", err)
-			}
-		}()
+		go func() { errCh <- ipc.RunWS(mgr, *wsPort) }()
 	}
 
-	if err := ipc.Run(mgr, *ipcPort); err != nil {
+	if err := <-errCh; err != nil {
 		log.Fatalf("ipc: %v", err)
 	}
 }