Follow-up to #390. PHONE_MAX had become 599, an inclusive bound, while
three of its four consumers still read it as exclusive (width < PHONE_MAX
for phone); the one site that switched to <= disagreed with
getDeviceType(). It is 600 again with < at every site. The breakpoint
table in docs/mobile-testing-report.md says 600, and the three 430px
visual baselines are removed: they depict the tablet tier now, and the
visual suite recreates a missing baseline on its next run on the machine
that owns them. device-matrix.test.ts is also run through Prettier, which
the commit hook demanded and the format gate (src/ only) never did.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Codeman maintainer