M13: add viewport-fit=cover so env(safe-area-inset-*) resolves on notched phones.
M14: like buttons (list card, grid overlay, lightbox) get aria-pressed + a
descriptive aria-label so AT announces self-state, not just the shared count.
M15: a prefers-reduced-motion media query neutralizes the decorative keyframes
(Ken Burns, crossfade, HeartBurst) and snaps transitions.
M16: join/recover name + PIN inputs and the lightbox comment input get aria-labels.
M17: FeedGrid overlay like/comment buttons get aria-labels and ≥44px hit areas.
M18: bump light-mode secondary text from gray-400 to gray-500 (keeping
dark:text-gray-400) across the app for WCAG AA contrast.
Also raises the PIN inputs to 6 digits (placeholder, maxlength, slice, and the
auto-submit threshold) to match the new 6-digit generated PINs; legacy 4-digit
PINs still submit via the button.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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