fix(face-motion): use reference portrait assets

[f0rr0]

Summary

• replace all nine deployed endpoints with the exact downloaded light-theme reference portraits
• replace all 48 transition cells with the exact downloaded reference transition assets
• retain the reference motion graph: eight center spokes, eight adjacent ring edges, and three authored cells per edge
• rebuild the single decoded runtime atlas and poster from those reference cells
• remove the obsolete GPT Image prompt/provenance claims and pin the reference source contract instead
• bump the asset revision so clients do not reuse the old generated Sid atlas

Source parity

All 57 endpoint and transition source files match the downloaded reference files byte-for-byte. Transition filenames are renamed only to fit the local canonical-edge convention; their contents are unchanged. portrait-neutral.webp is an exact copy of the reference center asset.

The deployed source set is the 240×240 light-theme WebP-with-alpha set from dahbiahmed.com. The complete downloaded light and dark inventory and raw generation artifacts remain local and are not included in the PR.

Runtime impact

The browser still uses one predecoded atlas, so transitions switch background position without per-frame image requests or the former momentary white flash.

• source frames: 57 files, 750,226 bytes total
• runtime atlas: 578,004 bytes
• runtime poster: 10,928 bytes
• runtime image payload: 588,932 bytes
• release budget: 1,500,000 bytes

Validation

• 57/57 deployed source frames match the reference downloads by SHA-256
• bun run typecheck
• targeted formatting and lint checks for all changed code and metadata
• bun test — 32 passed
• bun run verify:face-motion — 17 deterministic checks passed
• bun run build
• decoded endpoint and 57-cell atlas contact-sheet review
• all 16 canonical paths retain exact reference 25/50/75 progression

This PR is stacked on #66 and should merge after it.

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Project	Deployment	Actions	Updated (UTC)
f0rr0-github-io	Ready	Preview	Aug 15, 2026 11:13pm