feat: persist settings and enrich conversation context

src/services/chat/index.ts

@@ -5,6 +5,7 @@ export type {
   SyncStatus,
   SyncProgress,
   SyncPhase,
+  SyncCompletion,
   SyncProgressListener,
 } from './service.js';
 export type {
@@ -23,3 +24,4 @@ export {
   MatrixTokenRefresher,
 } from './matrix/token-refresher.js';
 export { MatrixMediaDownloader } from './matrix/http-media-downloader.js';
+export { MatrixUsernameResolver } from './matrix/username-resolver.js';