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/shared/ipc/contracts.ts

@@ -123,6 +123,22 @@ export const IPC_CHANNELS = {
     syncUiDeleteSnapshot: 'sync-ui:delete-snapshot',
     syncUiRevealSnapshot: 'sync-ui:reveal-snapshot',
     syncUiPickSnapshotFile: 'sync-ui:pick-snapshot-file',
+    animeBrowserGetSnapshot: 'anime-browser:get-snapshot',
+    animeBrowserEnsureBridge: 'anime-browser:ensure-bridge',
+    animeBrowserSelectSource: 'anime-browser:select-source',
+    animeBrowserSearch: 'anime-browser:search',
+    animeBrowserGetPopular: 'anime-browser:get-popular',
+    animeBrowserGetDetails: 'anime-browser:get-details',
+    animeBrowserGetEpisodes: 'anime-browser:get-episodes',
+    animeBrowserPlayEpisode: 'anime-browser:play-episode',
+    animeBrowserGetPreferences: 'anime-browser:get-preferences',
+    animeBrowserSetPreference: 'anime-browser:set-preference',
+    animeBrowserListAvailableExtensions: 'anime-browser:list-available-extensions',
+    animeBrowserInstallExtension: 'anime-browser:install-extension',
+    animeBrowserRemoveExtension: 'anime-browser:remove-extension',
+    animeBrowserRescanExtensions: 'anime-browser:rescan-extensions',
+    animeBrowserAddRepo: 'anime-browser:add-repo',
+    animeBrowserRemoveRepo: 'anime-browser:remove-repo',
   },
   event: {
     subtitleSet: 'subtitle:set',
@@ -156,6 +172,8 @@ export const IPC_CHANNELS = {
     notificationHistoryToggle: 'notification-history:toggle',
     syncUiProgress: 'sync-ui:progress',
     syncUiStateChanged: 'sync-ui:state-changed',
+    animeBrowserBridgeState: 'anime-browser:bridge-state',
+    animeBrowserSearchUpdate: 'anime-browser:search-update',
   },
 } as const;