fix(media-list): preserve ordering, viewport, notes field, and next-airing state on entry updates

[wax911]

AniTrend Pull Request

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Description

Fixes four reported regressions in the media-list entry update flow. Branch is based on and targets develop.

1. Visible list order changed after an entry update.
InMemoryMediaListStore.updateQueryMembership removed the updated entry ID and re-appended it, which reshuffled API-preserved ties and moved rows even when the active sort was server-ordered. The updated ID now keeps its slot before a stable re-sort, and ADDED_TIME / UPDATED_TIME comparators use the server createdAt / updatedAt values (added to MediaListCoreFragment, MediaListRecord, and the collection and mutation mappers) instead of the local request revision. revision remains only the stale-response guard.

2. Viewport moved away from the edited item.
BottomSheetSeriesManage now emits mutation-started and mutation-failed fragment results keyed by media ID. MediaListFragment captures the first visible media ID, decorated top offset, edited-entry baseline revision, and predecessor identities before a mutation, waits until the store commits a higher revision or the target leaves the active filter, and restores the recorded anchor through the adapter's final submitList commit callback (after the two-stage filter + diff). Failed mutations clear only the matching pending anchor. Shared increment dispatch (used by AiringListFragment) captures the same anchor. No notifyDataSetChanged, no object-identity keys, no new KeyUtil.*_REQ routing.

3. Comment placeholder overlapped entered text.
The notes card rendered both a static section_notes label and the outlined text-field hint. The duplicate MaterialTextView is removed; the TextInputLayout hint (dialog_hint_enter_your_notes) is the single placeholder owner, consistent with the BottomSheetSeriesManage reference design.

4. Next-airing label stayed at Releasing until app restart.
When a successful save returns media without nextAiringEpisode (observed for RELEASING titles), SaveMediaListEntryInteractor now performs a serial getMediaWithList fetch by the authoritative mediaId, re-validates the mutation session, and merges only the refreshed nextAiringEpisode into the committed record in the same upsert. A failed refresh does not invalidate the committed mutation, and no client-side dates are synthesized.

Invariants and compatibility

• Server-authoritative ordering: existing IDs keep their slot before a stable re-sort; equal-key rows keep API order; no client-side timestamp guessing.
• Viewport preservation is anchored to stable media IDs and pixel offsets, restored once, then cleared; stale anchors are dropped on matching mutation failure.
• Mutation session is re-verified after the refresh await; stale refreshed data cannot commit.
• The refresh merge is field-preserving (copy of the existing summary), so mutation-supplied fields such as banner image and site URL are retained.
• No presenter usage added; all touched paths are the migrated store/ViewModel surface. Legacy RecyclerViewAdapter and KeyUtil.*_REQ routing untouched.

Files changed

• app/src/main/graphql/fragments/medialist/MediaListCoreFragment.graphql (add createdAt)
• app/src/main/java/com/mxt/anitrend/domain/medialist/model/MediaListRecord.kt
• app/src/main/java/com/mxt/anitrend/data/mapper/MediaListRecordMapper.kt
• app/src/main/java/com/mxt/anitrend/data/mapper/MediaListCollectionRecordMapper.kt
• app/src/main/java/com/mxt/anitrend/repository/mapper/BrowseMapper.kt
• app/src/main/java/com/mxt/anitrend/data/store/medialist/InMemoryMediaListStore.kt
• app/src/main/java/com/mxt/anitrend/domain/medialist/interactor/SaveMediaListEntryInteractor.kt
• app/src/main/java/com/mxt/anitrend/adapter/recycler/index/MediaListAdapter.kt
• app/src/main/java/com/mxt/anitrend/view/fragment/list/MediaListFragment.kt
• app/src/main/java/com/mxt/anitrend/view/sheet/BottomSheetSeriesManage.kt
• app/src/main/res/layout/sheet_series_manage_m3.xml
• Tests: MediaListStoreTest.kt, SaveMediaListEntryInteractorTest.kt, BrowseMediaListCollectionRepositoryTest.kt (fixture field)

Tests added

• entry update reorders added-time sorts using server timestamps (red-first: failed before comparator fix)
• entry update reorders updated-time sorts using server timestamps (red-first)
• entry update preserves API order for equal updated-time keys (red-first: thenBy(mediaId) tie-break reshuffle)
• successful save with missing airing data commits refreshed next-airing episode (red-first: failed pre-fix with expected 12 but was null)
• Existing suite passes unchanged apart from the updated repository fixture.

Verification commands executed

• ./gradlew :app:testAppDebugUnitTest --tests com.mxt.anitrend.data.store.MediaListStoreTest --tests com.mxt.anitrend.domain.medialist.interactor.SaveMediaListEntryInteractorTest (all pass)
• ./gradlew test --no-daemon (full unit suite, all pass)
• ./gradlew :app:spotlessCheck --no-daemon (pass)
• ./gradlew :app:assembleAppDebug :app:assembleGithubDebug --no-daemon (pass, APKs produced)
• CI-equivalent: spotlessCheck test plus both flavor builds exit 0

Known limitations

• Live on-device verification of the four flows was interrupted (AniList returned HTTP 403 "API temporarily disabled" during the session and the runtime pass was stopped mid-run); all four fixes are covered by the offline red-green unit regressions above. AniList API reachability was re-confirmed (HTTP 200) at session end.
• When neither the mutation payload nor the fallback refresh returns nextAiringEpisode, the row keeps Releasing; no client-side date is guessed.

Follow-ups

• Reconcile app/.meta/version.json minSdk mismatch (existing automation issue, untouched here).
• Viewport restoration could move into a shared list-render helper if a second screen needs the same contract.

Rollback procedure

Revert the four commits (d585aaa42, b637c2ce6, a54cf8555, 9255401e5); no schema, migration, or persisted-state changes are involved, so a plain revert restores prior behavior.

Screenshots:

Live UI captures pending; offline verification evidence is in the description above.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Enhancement (Improves existing functionality)

IMPORTANT: By submitting a patch, you agree to allow the project
owners to license your work under the terms of the MIT License.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 24 complexity · 0 duplication

Metric	Results
Complexity	24
Duplication	0

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