The Playwright suite fails identically on every PR regardless of diff
(verified on a Python-only PR and a docs-only PR): the mock-backend
Electron window never gets a title, so boot/chat/setup/interim specs all
fail; only the dead-backend boot-failure path still passes. Breakage
window matches the Aug 1 night engines/npm churn (#76499/#76562/#76575).
Gated with 'false &&' in the job condition — delete that to re-enable.
Root-fix + re-enable tracked in #76627 (Ari).
226e27035b