fix(anime): keep browser state in sync and alias HLS segments

- Toggle the player Anime Browser without losing its state
- Share active playback state and support rotating fake segment extensions

src/main/runtime/stream-playback-metadata.ts

@@ -1,6 +1,7 @@
 import type { AnimeStreamMetadata } from '../../anime-bridge/episode-metadata';
 import type { AnilistMediaGuess } from '../../core/services/anilist/anilist-updater';
 import type { JimakuMediaInfo } from '../../types';
+import type { AnimeBrowserPlaybackState } from '../../types/anime-browser';
 
 /**
  * Holds what the anime browser resolved for active and queued streams.
@@ -53,6 +54,17 @@ export function matchRequestedStreamPlaybackMetadata(
   return store.match(requestedMediaPath ?? currentMediaPath);
 }
 
+export function toAnimeBrowserPlaybackState(
+  metadata: AnimeStreamMetadata | null,
+): AnimeBrowserPlaybackState | null {
+  if (!metadata) return null;
+  return {
+    sourceId: metadata.sourceId,
+    animeUrl: metadata.animeUrl,
+    episodeUrl: metadata.episodeUrl,
+  };
+}
+
 /** AniList counts whole episodes, so a special numbered 6.5 cannot drive it. */
 function wholeEpisode(episode: number | null): number | null {
   return typeof episode === 'number' && Number.isInteger(episode) && episode > 0 ? episode : null;