- Fix param sliders: Viewer now fits camera once per design (fitKey), not on
every param change — size changes are visible again. Better slider ranges.
- Progress UX: full-stage overlay with spinning cube + pipeline stepper,
animated thinking dots in chat, send-button spinner, staged status.
- B (vision verify): capture canvas → /api/verify (Claude vision) → auto-refine
one pass on mismatch. Fail-open so a flaky judge never blocks.
- C (persistence): D1 designs table + anonymous cookie identity, save/load/list,
designs drawer, autosave, shareable ids. no-store on all /api responses.
- D (STEP scaffold): /api/step + build123d prompt + service client (step.ts),
Download STEP button. Needs STEP_SERVICE_URL to go live.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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