fix(auth): unify imported sessions with account gating

src/services/reddit-session-importer.ts

@@ -1,10 +1,12 @@
 import type { Cookie } from 'playwright';
 import type { MatrixClient } from './chat/matrix/client.js';
 import type { MatrixCredentials } from './chat/matrix/types.js';
+import type { AccountAuthContext } from './account-auth-context.js';
 
 interface BrowserSessionTarget {
   importRedditCookies(cookies: Cookie[]): Promise<void>;
   isSessionValid(): Promise<boolean>;
+  getAuthenticatedUsername(): Promise<string | null>;
 }
 
 interface ChatSessionTarget {
@@ -20,6 +22,7 @@ export class RedditSessionImporter {
     private readonly chat: ChatSessionTarget,
     private readonly createMatrixClient: MatrixClientFactory,
     private readonly saveCredentials: CredentialStore,
+    private readonly accountAuth: AccountAuthContext,
   ) {}
 
   async import(cookies: Cookie[], credentials: MatrixCredentials): Promise<void> {
@@ -41,8 +44,15 @@ export class RedditSessionImporter {
     if (!(await this.browser.isSessionValid())) {
       throw new Error('Imported cookies did not authenticate with Reddit');
     }
+    const redditUsername = await this.browser.getAuthenticatedUsername();
+    if (!redditUsername) throw new Error('Reddit did not return an authenticated account identity');
 
     this.saveCredentials(credentials);
     this.chat.setMatrixClient(matrixClient);
+    this.accountAuth.markAuthenticated({
+      accountId: userId,
+      redditUsername,
+      matrixUserId: userId,
+    });
   }
 }