fix(anime): clarify bridge failures and update guidance

- Show actionable bridge errors and preserve episodes when details fail
- Check external bridges for updates without offering unsafe in-app installs
- Complete cleanup and ignore callbacks from closed Tsukihime sessions

src/animeui/error-message.ts

@@ -0,0 +1,71 @@
+export interface AnimeBrowserErrorMessage {
+  title: string;
+  explanation: string;
+  guidance: string;
+  details: string;
+}
+
+const OPERATIONS: Record<string, string> = {
+  getDetailsAnime: 'Could not load anime details',
+  getEpisodeList: 'Could not load episodes',
+  getVideoList: 'Could not resolve the video',
+  getSearchAnime: 'Could not search this source',
+  getPopularAnime: 'Could not browse this source',
+};
+
+/** Error messages survive both Electron IPC and the embedded browser's transport. */
+export function describeAnimeBrowserError(message: string): AnimeBrowserErrorMessage {
+  const bridge = /Anime bridge (\w+) failed(?: \(\d+\))?[.:]/.exec(message);
+  const operation = bridge?.[1];
+  const title = (operation && OPERATIONS[operation]) || 'Request failed';
+  const details = message;
+
+  if (
+    bridge &&
+    /NoSuchMethodError|NoClassDefFoundError|AbstractMethodError|(?:java\.lang\.Object|void|boolean) eu\.kanade\.[\w.$]+\(/.test(
+      message,
+    )
+  ) {
+    return {
+      title,
+      explanation:
+        'This extension needs functionality that the installed extension bridge does not provide.',
+      guidance:
+        'Check Extensions for bridge updates. If none are available, try another source and include the technical details when reporting the issue.',
+      details,
+    };
+  }
+
+  if (bridge && /lateinit property \w+ has not been initialized/.test(message)) {
+    return {
+      title,
+      explanation:
+        'The extension bridge could not read a required field from the extension’s data.',
+      guidance:
+        'Check Extensions for extension and bridge updates. If this continues, try another source and include the technical details when reporting the issue.',
+      details,
+    };
+  }
+
+  if (bridge) {
+    return {
+      title,
+      explanation: 'The extension bridge could not complete this request.',
+      guidance:
+        'Try the action again. If it keeps failing, check for updates in Extensions or try another source.',
+      details,
+    };
+  }
+
+  if (/^mpv could not play this stream|^Playback did not start\./.test(message)) {
+    return {
+      title: 'Could not start playback',
+      explanation: 'mpv could not start the selected stream.',
+      guidance:
+        'Try playing the episode again to request a fresh stream, or choose another source.',
+      details,
+    };
+  }
+
+  return { title, explanation: message, guidance: '', details: '' };
+}