Formatting only: run prettier across the frontend and gofmt over the
backend. Fixes struct-field alignment in domain/pool.go and pre-existing
prettier drift in a few frontend files.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Pools now store a sort setting (sort_key + sort_order). "manual" keeps the
user-arranged order in file_pool.position and allows drag-to-reorder; any
other key (content_datetime, created, original_name) sorts the pool's files
automatically server-side, in which case reordering is rejected. Manual
order is always ascending by position — direction does not apply.
Backend: add the columns (sort_key defaults to 'manual'), generalise the
pool-files keyset cursor to page by the active sort, persist the setting on
create/update, and guard reorder against non-manual pools.
Frontend: a sort dropdown (+ direction toggle) on the pool page that PATCHes
the pool and reloads; drag-to-reorder is disabled unless the pool is manual.
Closes the "automatic sorting in pools" requirement (REQUIREMENTS.md §4.6.5).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
H1K0