By: Michael Lynch <git@mtlynch.io>
Fix e2e test for reaction date tooltip
Temporal.PlainDate.from() rejects ISO strings with a UTC designator
("Z"), since PlainDate is timezone-unaware. Strip the trailing Z before
parsing so the tooltip is set correctly.
Also upgrade Playwright from 1.57.0 to 1.58.2, which bundles
Chromium 145 (>= 144 where Temporal ships without a flag).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>