refactor(coding-agent/cli): switched auth-broker serve to dedicated logger transport setter

- Updated the auth-broker CLI to import the transport setter from the logger module.
- Replaced the logger.setTransports call in runServe with the dedicated setTransports helper.

packages/coding-agent/src/cli/auth-broker-cli.ts

@@ -34,6 +34,7 @@ import {
 	startAuthBroker,
 } from "@oh-my-pi/pi-ai";
 import { $which, APP_NAME, getAgentDbPath, getConfigRootDir, isEnoent, logger, VERSION } from "@oh-my-pi/pi-utils";
+import { setTransports as setLoggerTransports } from "@oh-my-pi/pi-utils/logger";
 import { $ } from "bun";
 import chalk from "chalk";
 import { resolveAuthBrokerConfig } from "../session/auth-broker-config";
@@ -124,7 +125,7 @@ async function runServe(flags: AuthBrokerCommandArgs["flags"]): Promise<void> {
 	// The broker is a long-running headless service: route structured logs to
 	// stdout so a process supervisor (pm2, journald, k8s) captures them, and
 	// skip the rotating ~/.omp/logs/ file the TUI default would have used.
-	logger.setTransports({ console: true, file: false });
+	setLoggerTransports({ console: true, file: false });
 
 	const bind = flags.bind ?? DEFAULT_AUTH_BROKER_BIND;
 	const token = await ensureToken();