Server-side jitter-resistant recompute: the three generation paths (non-streaming / stepwise / streaming) uniformly take over occasional-failure recompute, so a user's single request already gets the stability benefit that previously only evaluation had.
Bug Fixes
Reverted the prompt rule that caused regression; full acceptance ground truth reached the best ever (45-question headless ground truth 43/45, format 45/45, http errors 0).
Fixed several stable point-loss spots (circle / angle / polyhedron / foot-of-perpendicular naming and construction issues).
