The live "Library" tab renders AnimeTab via App.tsx; LibraryTab and its
useMediaLibrary hook were never wired in. Remove them so the dead code
doesn't mislead readers, and drop the collapsible-library-group item
from the feedback-pass changelog since it targeted dead code.
Group sessions for the same video inside each day header so repeated
viewings of an episode collapse into a single expandable bucket with
aggregate active time and card counts. Multi-session buckets get a
dedicated delete action that wipes every session in the group via the
bulk delete endpoint; singleton buckets continue to render the existing
SessionRow flow unchanged.
Delete confirmation copy lives in delete-confirm for parity with the
other bulk-delete flows, and the bucket delete path is extracted into a
pure buildBucketDeleteHandler factory so it can be unit-tested without
rendering the tab. MediaSessionList is intentionally untouched -- it is
already scoped to a single video and doesn't need rollup.
Pure TS helper that buckets SessionSummary[] by videoId for the
Sessions tab collapsible UI (Task 8). Null videoIds become singleton
buckets keyed by sessionId. Covered by 4 node:test cases.
Add Delete Episode button to MediaDetailView/MediaHeader; extract
buildDeleteEpisodeHandler for testability. Add refresh() to
useMediaLibrary (version-bump pattern) and call it in LibraryTab's
onBack so the list reloads after a delete.
Filters out noteIds whose Anki note no longer exists, drops card events
that have no surviving noteIds, and shows a muted footer counting hidden
cards. Loading-state guard (noteInfosLoaded) prevents premature filtering
before ankiNotesInfo resolves.
Add '365d' to the client TrendRange union, the TimeRange hook type, and
the DateRangeSelector segmented control so users can select a 365-day
window in the trends dashboard.
