add new user to about pod

The browser install step could hang indefinitely on a Playwright CDN
stall (a run hung ~47min before being cancelled). Cache the browsers
under ~/.cache/ms-playwright keyed by package-lock.json, only download
on cache miss, and bound the step with timeout-minutes so a stall fails
fast instead of blocking the job. Also drop webkit (unused) from the
install, keeping only chromium and firefox.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

playwright install hangs right after the Chromium download reaches 100%
when run on Node 24.16+ (the version GitHub runners now resolve from
.nvmrc). This is a Playwright regression affecting <1.60.0, fixed in
1.60.0. Bump @playwright/test and playwright pins accordingly.

Refs: microsoft/playwright#40998, microsoft/playwright#41092

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

chore: added changeset