fix(anime): scope preferences, paginate sources, harden installs

- Preference store keys entries by extension package + bridge source id; legacy unscoped entries are discarded once instead of being handed to whichever extension asks first
- Source picker's "Load more" appends the next page without duplicating streamed results
- Repository index fetches and subtitle/APK downloads now time out and are size-bounded instead of hanging or growing unbounded
- APK installs are staged to a temp file and renamed into place
- Stream metadata lookup matches the requested path, not only the currently playing one
- Reworked animeui into browse-state/detail-panel/panels.css modules
- Reverted premature CHANGELOG unreleased entries; refreshed anime-browser docs

src/animeui/extensions-panel.ts

@@ -186,8 +186,14 @@ export function createExtensionsPanel(options: ExtensionsPanelOptions) {
             {
               label: 'Remove',
               onClick: async () => {
-                await api.removeRepo(repoUrl);
-                await refresh();
+                setStatus('Removing repository…');
+                try {
+                  await api.removeRepo(repoUrl);
+                  await refresh();
+                  setStatus('Repository removed', 'ok');
+                } catch (error) {
+                  setStatus(describe(error), 'error');
+                }
               },
             },
           ],