New ▦ button beside ⬆ 2x Pixel. The canvas divides into ~1MP boxes
that exact-tile it (no overlap); each box runs the Xtra-Fine pipeline
(ref 0.4, denoise 0.55, 176px ctx pad, hard feather-0 masks) under
'restore the image. make it clear and sharp.' — in CHESS order, so
the second colour's boxes refine with already-refined neighbours
visible in their context pad and match them. Compositing is
Xtra-Fine's bit-exact latent blend per box — no pixel feathering
anywhere in the path. Whole pass = ONE history entry; per-box seeds
derive from the Seed widget. The MP-target nudge forces the crop
path so the whole-canvas shortcut can never fire. Box size is one
constant (_LIR_BOX_MP) for later tweaking.
shootthesound
d9327e8632