Interim viz build: multi-visit return strip now GROUPS by pose. Each pose renders as a labeled box (Pose A = first observed frame, Pose B = mid observed frame) that LEADS with the Observed GT as the reference target on the left, followed by that method's Visit 1 / Visit 2 / Visit 3 of the SAME pose, each captioned 'Visit k'. Added the caption 'Each Observed GT is the target its same-pose visits should reproduce (GT-PSNR = visit vs this GT; self-PSNR = visit vs Visit 1)', so the obs<->visits correspondence is now unmistakable. Preserves the 倍速 speed control, lockstep sync, native-res grids, the moving-back single-pose strips, the 'Why explicit caching' motivation section, and all prior sections. Deferred (render gracefully, not yet landed): dynamic-region mover-only PSNR (n/a) and the DiT+VACE-full ablation arm (pending). [root]
