feat(admin): redesign library management with HTMX expandable rows + stats dashboard

Library management:
- Redesign admin_library page with expandable rows that load detail
  panels via HTMX (LibraryList, LibraryPanel, FolderBrowserContent partials)
- Add create/edit/delete library modals using data-* attributes
- Add folder browser modal with inline add/remove via HTMX
- Add user visibility checkboxes toggled via HTMX
- New endpoints in admin_library.go: create, update, delete, panel,
  folders add/remove, browse, visibility
- New template types: FolderData, DirEntry, UserVisibilityData,
  AdminStats; extend LibraryData with TypeValue and FolderCount

Admin dashboard:
- Rewrite admin.templ to show 4-stat grid (libraries, media, users, devices)
- Add getAdminStats helper querying library/user/media/device counts
- Pass AdminStats to template from both /admin and /admin/ handlers
This commit is contained in:
2026-08-07 09:35:39 -04:00
parent a87c8afc22
commit 706be09dec
7 changed files with 1813 additions and 510 deletions
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