fixed UTF8 bug
fixed infinite loading
added search bar to migration screen
migration screen now considers the pinned sources option
library now shows if the items are locally tracked or not
Merge `fetchMangaSourcesListProvider`, `fetchAnimeSourcesListProvider` and `fetchNovelSourcesListProvider` into a single Provider, `FetchItemSourcesListProvider`, reducing code duplication.
```
Exception has occurred.
ArgumentError (Invalid argument(s): No host specified in URI )
```
at line 79:
`final req = await http.get(Uri.parse(source.sourceCodeUrl!));`
when source.sourceCodeUrl is empty.
Resolved an issue where items could not be added to the tracker due to the use of an incorrect ID. This caused `parseTrackResponse()` to fail in locating the 'included' key within `jsonResponse`, leading to a null return. As a result, an exception was thrown in `tracker_widget.dart` at line 134 when accessing `widget.trackRes.title!,` triggering a _TypeError (Null check operator used on a null value)_.
- Resolved the same timestamp conversion issue that affected MyAnimeList.
- Previously, seconds-to-milliseconds conversion and `DateTime.now()` were applied twice — once on `login()` and once in `_getAccessToken()` — resulting in incorrect expiry dates (e.g., year 57349).
- Updated Kitsu’s URL from `.io` to `.app`.
getMangaChapterDirectory() now accepts an optional mangaMainDirectory
to avoid calling getMangaMainDirectory() and thus getDirectory() twice in places where both methods are called successively.