Add resized WebP copies of the five site images

Details

The profile photo shipped as a 2544x2544 PNG, 6.73 MB, on every page load of
/, /v1/ and /v2/ while being displayed in a box that never exceeds 445 px.
That one file was 98% of the site's Supabase egress and blew the free-tier
quota in roughly 820 page views.
Re-encoded at 900 px for the portrait and 600 px on the long edge for the three
stills the v1 rotator cycles through:
  profile       6886.5 KB -> 52.2 KB   (132x)
  cikm           485.1 KB -> 54.4 KB
  thesis         168.1 KB -> 34.0 KB
  final-project  134.7 KB -> 23.8 KB
  favicon         14.2 KB -> 14.2 KB   (copied byte for byte)
  total         7688.6 KB -> 178.7 KB  (43x)
The source PNG carries a fully opaque alpha channel, so nothing is lost by
encoding to WebP without transparency.
On sampling: 900 px is 2x the widest box measured at any viewport (v2, 445 px),
but v2 crops a square source to `aspect-ratio: 4 / 5` with `object-fit: cover`,
so its 557 px height is what binds — 1.62x there, not 2x. The rotator stills
are governed by their short edge inside a 240 px circle: 1.72x, 1.88x and
1.39x. All were read at 2x and none shows artifacting, but the honest number
for the tightest case is 1.39x, not 2x.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DAJJ63FFnLoD5XLpu6yJaG

Files changed (5)