fix: small fixes

cmd/agent/main.go

@@ -10,9 +10,11 @@ import (
 	"net/url"
 	"os"
 	"os/signal"
+	"strconv"
 	"syscall"
 
 	"github.com/x-grk/longpolling-remote-access/internal/agent"
+	"github.com/x-grk/longpolling-remote-access/internal/tunnel"
 )
 
 func main() {
@@ -48,7 +50,7 @@ func envOr(key, def string) string {
 	return def
 }
 
-// tunnelAddr derives the direct-tunnel address (host:8446) from the server URL.
+// tunnelAddr derives the direct-tunnel address (host:port) from the server URL.
 // It is only the starting point: the agent follows the host and port set in
 // the panel settings, unless TUNNEL_ADDR (the whole address) or TUNNEL_PORT
 // (just the port) pins it here. Set TUNNEL_ADDR=off to disable the tunnel.
@@ -63,5 +65,5 @@ func tunnelAddr(hostURL string) string {
 	if err != nil || u.Hostname() == "" {
 		return ""
 	}
-	return net.JoinHostPort(u.Hostname(), envOr("TUNNEL_PORT", "8446"))
+	return net.JoinHostPort(u.Hostname(), envOr("TUNNEL_PORT", strconv.Itoa(tunnel.DefaultPort)))
 }