feat(anime): add anime browser powered by Aniyomi extensions

- Add `subminer anime` / `--anime` and a tray entry to open a browser that searches installed Aniyomi extension sources, shows cover art and episodes, and plays into mpv with overlay/mining attached
- Add an Extensions tab to add repos and install/update/remove sources, and per-source settings for sources needing config
- Support searching all sources at once with streaming, per-source results and status
- Prefer Japanese audio/subtitle tracks from the source and keep the primary subtitle slot reserved for Japanese
- Fix window/tray/Dock handling so the browser and mpv can be switched between without quitting the app or losing the Dock icon
- Add anime.repos, anime.extensionsDir, anime.preferredQuality config keys (no bundled repos or discovery)

src/core/services/app-lifecycle.ts

@@ -186,7 +186,8 @@ export function startAppLifecycle(initialArgs: CliArgs, deps: AppLifecycleServic
       (!deps.isDarwinPlatform() ||
         initialArgs.settings ||
         initialArgs.setup ||
-        initialArgs.syncWindow)
+        initialArgs.syncWindow ||
+        initialArgs.animeBrowser)
     ) {
       deps.quitApp();
     }