toybox-stories.md: the weekly roundup (#23), album-to-album sync
(endojs/playground#16), and drag-to-archive.org (#118), with the needs
they share. The checklist gains the toybox tree: a changed signal (T1),
Blockly composition by petname (T2), and confined code in Dynamic
Workers (T3).
Generated-by: Claude Opus 5.5
