docs(plan): documents folders implementation plan
17-task TDD plan covering schema + migration, service (listTree,
create, rename, move with cycle prevention, soft-rescue delete),
validators, API routes, hook, sidebar tree, breadcrumb, actions menu,
move-to-folder dialog, hub wiring (drop signature-only pill, In-
progress tab, dynamic type chips), admin-configurable Expired tab,
Playwright smoke, and CLAUDE.md update. Decisions locked: port-wide
tree, hub tabs stay flat, documents.manage_folders new perm, soft-
rescue on delete (never CASCADE), folder watchers out of scope.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Matt
51a60c1b9e