The History page's "Episodes" media filter was structurally empty: both
history read paths collapse episode watch events into their series
display item, and the resulting series ids were then filtered against
type='episode' — guaranteed zero results.
The episode media scope now resolves history at episode granularity:
- loadPersonalSourceIDs keeps each watched episode's own id (deduped to
the most recent watch, most-recent-first) instead of collapsing to the
series; ListFilters and SearchFacet share the loader, so facets on the
episode-scoped history view work too.
- fetchAccessibleItemsByID gains an episode-scope path through the
episode catalog query executor, since episode rows never hydrate from
media_items via the browse repository.
Every other scope keeps the existing series-collapse behavior.
Fixes#299
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
