Fifth admin page and the section's hub. Documents library creation
(name/description/type — type fixed at creation, verified in the edit
modal), the card's Force Rescan + Manage controls, and the full panel:
folders (add via Browse or manual path, shallow per-folder scan,
removal-unregisters-only semantics verified in DeleteLibraryFolder —
files and items untouched, archive lifecycle governs the rest; podcast
roots refuse hand scans), User Access visibility checkboxes (default-
allow, DB-enforced), the processing-issues link, and Delete Library's
exact destructive scope (records + reading data gone, files on disk
untouched). Ends with the at-a-glance scan table linking scanning.md.
Adds the Libraries backlinks to the processing-issues and archived
pages. Glossary gains Create Library, Manage, Edit Details, Delete
Library, View Archived, Purge Archived Now, Browse, User Access.
Fourth admin page. Documents the two-consecutive-scans archive rule,
the history-preserving rationale, ARCHIVE_RETENTION_DAYS (default 90,
0 = manual-purge-only, verified in config.go), and the four actions with
verified semantics: Merge (progress/annotations/collections folded into
the active copy, per-user collisions keep the active copy — mirrors
hash-conflict resolution), Restore (immediate; re-archives if the file
is truly still gone), Delete (item + history, permanent), Purge All
Archived (the clean-slate button, confirm text quoted). Links to
scanning.md for why only library-wide scans archive. Glossary gains
Purge All Archived, Merge, and a scoped generic Delete entry.