Add two React SPA editor screens over the existing REST APIs, retiring the
last two "Classic UI only" media-collection editors.
MultiCollectionsScreen (/app/multi-collections, #151): list + in-screen
editor. Name + a list of manual/smart collection items, each with a
Schedule-As-Group toggle; two add-pickers dedupe already-present entries.
Items save with playbackOrder "Chronological" (matches the Blazor editor).
RerunCollectionsScreen (/app/rerun-collections, #152): list + in-screen
editor. Name, a Collection Type select restricted to the REST-supported
selection set (IsSupportedSelectionType) — Collection/MultiCollection/
SmartCollection plus the media-item types TelevisionShow/TelevisionSeason/
Artist/Movie/Episode/MusicVideo/OtherVideo/Song/Image/RemoteStream (every
one maps to a working LibraryBrowseMediaType picker); Playlist is excluded.
A conditional single-selection picker per type, and First/Rerun playback
order selects with the Blazor type-conditional option sets (reset on type
change).
Both screens toggle list<->editor via local state (mirroring
CollectionsScreen), no sub-path routing. Wired into App.tsx (imports,
ScreenId, routes, mediaNavIds, ScreenContent). Added messageFrom*Error
helpers + type re-export to the api clients.
Tests: multiCollections/rerunCollections api-client param+body tests,
both screen tests (list render, create body, rerun type-switch swaps
picker + order options, delete), and an App.tsx nav-registration test.
Docs: blazor-route-parity.md (rows moved to SPA DONE), domain-model.md.
web verify gate: 353 tests pass, eslint clean, tsc -b + vite build clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
