Mehakdeep Singh 861ee65113 perf(library): decode covers at thumbnail resolution to cut image-cache RAM ... Refs #609 (high RAM with stutters). Manga / anime covers from sources are typically 720x1080 or larger (~3 MB decoded RGBA per cover). The library grid, library list and generic browse / search card widgets render those covers at roughly 150x220 logical pixels, but every cover decoded to its full source resolution and that decoded bitmap landed in Flutter's `imageCache`. With 30-50 covers in flight during a normal scroll, the default 100 MB cache filled and the engine started evicting + re-decoding aggressively — exactly the symptom in #609 (stutters + high RAM). Mangayomi already had `ExtendedResizeImage` available via the `extended_image_library` package and used it in one place (`cachedCompressedNetworkImage`, called only from the History screen). This commit generalises that pattern. Add a `coverProvider()` helper in `lib/utils/cached_network.dart` that wraps `CustomExtendedNetworkImageProvider` in `ExtendedResizeImage` with a 200 KB encoded budget — sharp at typical thumbnail size on high-DPR screens, ~3.6x smaller decoded than a full-resolution cover. Pass through the same `cache` / `cacheMaxAge` knobs the underlying provider exposes so existing disk-cache behaviour is preserved. Swap the three high-traffic thumbnail call sites to use it: * `lib/modules/library/widgets/library_gridview_widget.dart` * `lib/modules/library/widgets/library_listview_widget.dart` * `lib/modules/widgets/manga_image_card_widget.dart` (both `MangaImageCardWidget` and `MangaImageCardListTileWidget`, used by browse and search results) Deliberately not changed: * The manga / anime detail page hero cover — large display, full resolution is appropriate. * Reader pages — already memory-managed by `ChapterPreloadManager` and need full resolution for actual reading. * `cachedNetworkImage()` and other lower-traffic thumbnail surfaces (tracker results, calendar, recommendation grid). Easy to extend in a follow-up if anyone asks; kept narrow here so review is manageable. Verified * `flutter analyze` clean on every touched file * `flutter build macos --release` succeeds * Smoke-tested on macOS with the local-all-fixes build: library grid, library list and browse card all render identical-looking covers at typical thumbnail sizes; no visible quality regression at the displayed scale		2026-05-09 23:37:44 -07:00
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