Add node mode with SSH auto-install and Remnawave-style manual deploy.

Co-authored-by: Cursor <cursoragent@cursor.com>

cmd/server/main.go

@@ -34,7 +34,7 @@ func main() {
 	}
 
 	authMgr := auth.New(cfg.Secret)
-	srv, err := handlers.New(database, authMgr, "web/templates")
+	srv, err := handlers.New(database, authMgr, cfg.Secret, "web/templates")
 	if err != nil {
 		log.Fatalf("handlers: %v", err)
 	}