Append-only JSONL audit trail for all browse server commands. Unlike
in-memory ring buffers, the audit log persists across restarts and is
never truncated. Each entry records: timestamp, command, args (truncated
to 200 chars), page origin, duration, status, error (truncated to 300
chars), hasCookies flag, connection mode.
All writes are best-effort — audit failures never block command execution.
Log stored at ~/.gstack/.browse/browse-audit.jsonl.
Closes#617
Co-Authored-By: Alberto Martinez <halbert04@users.noreply.github.com>
Garry Tan