- Drop the ge=0 constraint on FitReq.offset_mm (negative values are a documented usage: aggressive noise cull above the plane). - HTML input min lowered to -200 to match. - Render FastAPI 422 validation arrays as a human-readable string in the status chip (was showing "[object Object]"). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>