Improve messaging and dashboard reliability

tests/repository-account-isolation.test.ts

@@ -9,6 +9,7 @@ import {
   DeliveryOutboxRepository,
   MessagesRepository,
   PostsRepository,
+  RecipientHistoryRepository,
   SuccessfulMessagesRepository,
 } from '../src/database/repositories.js';
 import { buildConversationState } from '../src/services/conversation-state.js';
@@ -75,6 +76,8 @@ describe('account-bound domain repositories', () => {
     expect(messagesB.getByPostId('same-post')).toMatchObject({ id: messageB, message: 'from B' });
     expect(messagesA.hasSentTo('only-a')).toBe(true);
     expect(messagesB.hasSentTo('only-a')).toBe(false);
+    const recipientHistory = new RecipientHistoryRepository(db);
+    expect(recipientHistory.hasSentTo('ONLY-A')).toBe(true);
     expect(messagesA.getByChatRoomId('same-room')?.recipient).toBe('only-a');
     expect(messagesB.getByChatRoomId('same-room')).toBeUndefined();