* M8: grid auto-placement on an occupancy bitmap (#1083)
Grid placement tested every cell of a child's span at every position it tried. The taken cells are now a bitmap: spans are checked a 64-bit word at a time, the search jumps past the blocking cell, a row's search ORs the span's rows once, and a column-anchored child looks on from where the last one with the same column and spans found room. Placements are unchanged (checked against the old search on random grids); a crafted 1000 x 1000 grid takes 0.3 ms instead of 192 ms.
* M8: grid occupancy stores rows only once a cell in them is taken
An empty or sparse grid no longer allocates the whole bitmap up front (CodeRabbit on #1593).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Co-authored-by: Brandon Thomas <echelon@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Brings the progress docs up to date with what landed on 2026-10-17: community batches #727, #728, #733, #735, #736 and #753, plus #729, #745, #746 and #751. Docs only.
A 64-case behaviour suite derived from public documentation (sizing, padding, strokes, gaps, alignment, wrap, absolute position, grid, stacking) plus command-level tests. Fixes: frames never shrink below their padding, only the frame's own inside stroke counts when strokes are included (now the default for new auto layout), auto gaps stop at 0, grid fr tracks never go below their content, and canvas stacking (reverseZ) now drives drawing, exports and hit testing. New settings: evenly/around auto gaps, vertical wrap with a column gap, per-child grid cell alignment, strokes included/excluded and canvas stacking in the Design panel.
Progress docs per craftrules standards/progress-docs.md: target-app parity, gaps, roadmap with alpha gate, readiness by audience (full / mainstream / essentials) with Opus 5.5 hours, and auto layout, components, prototyping, dev mode, collaboration, format, hardware, UI and localization parity docs.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
