95cdfa30cf
Tiles get an absolute grid slot instead of a packed order: a tile lands exactly where it is dropped, dropping on another tile swaps the two, everything else stays put, and empty cells and empty pages persist. The mockup previews the result while dragging, a new page waits below the last one, "Pagina toevoegen" keeps an empty page, empty cells accept the next tile from the picker, and the mouse no longer selects text while dragging. Storage and protocol stay version 1: `tiles[].slot` (0-47) and `pages` (1-8) are additive, the layout message carries `slots` and `pages`. Firmware 0.2.26 places tiles on those slots (`place()` next to `pack()`); older firmware packs in order as before and the editor says so. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>