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/main/state.ts

@@ -153,6 +153,7 @@ export interface AppState {
   firstRunSetupWindow: BrowserWindow | null;
   configSettingsWindow: BrowserWindow | null;
   syncUiWindow: BrowserWindow | null;
+  animeBrowserWindow: BrowserWindow | null;
   yomitanParserReadyPromise: Promise<void> | null;
   yomitanParserInitPromise: Promise<boolean> | null;
   mpvClient: MpvIpcClient | null;
@@ -240,6 +241,7 @@ export function createAppState(values: AppStateInitialValues): AppState {
     firstRunSetupWindow: null,
     configSettingsWindow: null,
     syncUiWindow: null,
+    animeBrowserWindow: null,
     yomitanParserReadyPromise: null,
     yomitanParserInitPromise: null,
     mpvClient: null,