Cherry-pick 7 pixel-art sprites from feat/pet-ui-v1 (PR #16) — cat
(idle/happy/think/sleep), dog-idle, owl-idle, blob-idle — into
cortex-ui public dir so the PetEditor view renders a visual pet
instead of a bare JSON dump.
## Behavior
- Species inferred from first letter of pet_name:
- 'd*' → dog, 'o*' → owl, 'b*' → blob, else → cat (default,
has 4 mood states)
- Mood switcher: click idle / happy / think / sleep → swaps sprite
- image-rendering: pixelated for crisp pixel-art scaling
- 32×32 native scaled to 128×128 (4x) with nearest-neighbor
## Why now
User tested the UI end-to-end, confirmed auth+CORS+whitespace fix
works, then asked for the cat. The sprite-gen commit (PR #16) is
still unmerged but sprites are sibling static assets — safe to copy
into cortex-ui without blocking on PR merge. Ownership stays with
the sprite-gen branch; cortex-ui just embeds the artefacts.
Rebuild hash: index-RLWTBoLo.js + index-BzERxlis.css.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
a42847063f
