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Codeman maintainer
e702f3c151
Owner: an empty cell need not be the last one ("the empty tab can also
be tab nr 4 or 3"). The helpers that let the grid hold cells instead of
a packed list, with no behaviour change on their own:
- fitTileCells: the cells after a shape change. The same shape keeps
every cell, holes included; a new shape keeps each tile at its row
and column when all fit (2x2 growing to 3x2: the four tiles stay
put), else the tiles pack in reading order.
- tileInDirection takes cells: focus never lands on an empty cell.
Left and right go along the row past a hole and never leave it; up
and down take the nearest row with a tile, the same column else the
nearest (lower on a tie). For a packed list this is exactly the old
rule, short last row included.
- tileCellInDirection: the adjacent cell a Move Tile chord moves into
or swaps with.
- sanitizeTileGridState reads the stored ids as cells (null for an
empty one) and returns them as `cells` beside the packed `ids`; a
dropped id becomes a hole, never a shift. The old packed format reads
as cells with no hole.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>