This commit improves memory management, reduces redundant interpreter
instantiation, and standardizes service usage patterns.
- Add `dispose()` to `ExtensionService` interface and implement it across
Dart, JS, LNReader, and Mihon services.
- Replace repeated interpreter creation in `DartExtensionService` with a
persistent `_interpreter` instance initialized once in the constructor.
- Add disposal logic for JS DOM selector and Cheerio instances to prevent
memory leaks.
- Introduce `withExtensionService()` helper to ensure services are always
disposed after use.
- Update call sites across the codebase to use `withExtensionService()`
or manual try/finally disposal.
- Improve isolate service message handling by extracting `responsePort`
earlier.
- Ensure safer defaults (e.g., returning empty lists, const lists) when
service calls fail.
- Introduce _addLog() helper to manage log insertion
- Enforce a maximum log history of 200 entries to prevent unbounded memory growth
- Replace direct _logsNotifier.value.add(event) with safe, immutable-style list update
- Improve log handling consistency and avoid mutating notifier state in place
Merge `fetchMangaSourcesListProvider`, `fetchAnimeSourcesListProvider` and `fetchNovelSourcesListProvider` into a single Provider, `FetchItemSourcesListProvider`, reducing code duplication.
There was a bug when uninstalling an extension and trying to reinstall it, it didn't install.
You had to restart the app to reinstall the same extension again.
Now the provider is invalidated when reinstalling an uninstalled extension,
so the fetch logic is triggered correctly. Prevents stale cache issues from
Riverpod's keepAlive behavior.
