Replace per-card Isar tracking streams with a single subscription in
TrackerSectionScreen.
- Build a mediaId -> Track index at the screen level
- Pass resolved Track? into TrackerLibraryImageCard
- Convert TrackerLibraryImageCard to a plain StatelessWidget
- Remove StreamBuilder, ConsumerStatefulWidget, and keep-alive boilerplate
- Keep the same UI while reducing widget-level DB work
This follows the same parent-index pattern used elsewhere and makes
the tracker library view lighter and easier to maintain.
Remove synchronous Isar queries from each library grid item when
downloadedChapter is enabled.
- Replace per-card download queries with downloadedChapterIdsProvider
- Compute downloadCount via in-memory lookup instead of DB calls
- Eliminate repeated sync queries on rebuilds and tab switches
- Minor cleanup of unread chapter filter
This avoids dozens of synchronous queries per frame and significantly
improves grid performance and responsiveness.
Replace per-widget Isar StreamBuilder usage with a single shared
library index managed in MangaHomeScreen.
- Subscribe once to manga updates and build a name -> Manga map
- Pass libraryManga down to card widgets instead of querying per item
- Remove StreamBuilder logic from MangaImageCardWidget and list tile
- Use library data for cover, tracker image, and favorite state
- Add favorite overlay indicator based on libraryManga
- Clean up redundant filtering and improve performance
This reduces rebuild overhead and avoids multiple database listeners
per list/grid item.
`addListener` is called inside the `data:` callback of `build()`.
Every single time the widget rebuilds, which happens on scroll, on tab switch,
on any `setState`, it adds *another* listener to `_scrollController`,
stacking up indefinitely. With 100 items and active scrolling,
you can easily accumulate hundreds of listeners,
each one firing `setState` + `_loadMore()` on every scroll-to-bottom.
Fix: Move the listener setup to `initState()` and remove it in `dispose()`
Each UChapDataPreload holds a GetChapterPagesModel that itself holds all pageUrls, archiveImages, etc. For a 50-page chapter this creates 50 model objects each referencing all 50 URLs.
Fix an Exception:
```
════════ Exception caught by rendering library ═════════════════════════════════
A RenderFlex overflowed by 274 pixels on the bottom.
The relevant error-causing widget was:
Column Column:file:///lib/modules/manga/reader/widgets/chapter_transition_page.dart:28:18
════════════════════════════════════════════════════════════════════════════════
```
Improved: The UI adapts to the reading mode now
Also, change
`entry.chapters.toList().reversed.toList().last`
to
`entry.chapters.first`
Why reverse the list and then get the last item, when you can just get the first?
Refactor history lookup to use a direct mangaIdEqualTo query instead of the previous multi‑level chapter/manga filter.
The new approach improves performance, readability, and maintainability without changing how the play button behaves or how history entries are resolved.
