Function writeToFile

util/logger.ts:16–24

(level: string, msg: string)

let logFilePath: string | null = null;

function writeToFile(level: string, msg: string) {
  if (!logFilePath) return;
  const line = JSON.stringify({
    timestamp: new Date().toISOString(),
    level,
    message: msg,
  }) + "\n";
  appendFileSync(logFilePath, line, "utf8");
}

export function initFileLog() {
  if (logFilePath) return;