Record sent chats in messages repo and blur gallery by default

Threads MessagesRepository through ChatService so first outgoing chat
messages are persisted for stats, and extends the repo + DB client to
support chat-room-keyed lookups. Adds tests covering the new behavior.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/services/chat/service.ts

@@ -1,5 +1,5 @@
 import type { Logger } from '../../utils/logger.js';
-import type { SuccessfulMessagesRepository } from '../../database/repositories.js';
+import type { MessagesRepository, SuccessfulMessagesRepository } from '../../database/repositories.js';
 import type { MediaService } from '../media.js';
 import { ChatCache } from './cache.js';
 import { MatrixClient, MatrixAuthError, MatrixRateLimitError } from './matrix/client.js';
@@ -114,6 +114,7 @@ export class ChatService {
     private tokenRefresher?: TokenRefresher,
     private usernameResolver?: UsernameResolver,
     cache?: ChatCache,
+    private messagesRepo?: MessagesRepository,
   ) {
     this.cache = cache ?? new ChatCache(logger);
   }
@@ -701,6 +702,27 @@ export class ChatService {
     if (firstSelf) chat.originMessage = firstSelf.text;
 
     const hasReply = chat.messages.some((m) => !m.isSelf);
+
+    if (firstSelf && chat.roomId && this.messagesRepo) {
+      try {
+        const existing = this.messagesRepo.getByChatRoomId(chat.roomId);
+        const id = existing
+          ? existing.id
+          : this.messagesRepo.insertChat({
+              recipient: chat.username,
+              subject: chat.username,
+              message: firstSelf.text,
+              sentAt: firstSelf.timestamp,
+              chatRoomId: chat.roomId,
+            });
+        if (hasReply && !existing?.gotResponse) {
+          this.messagesRepo.markGotResponse(id);
+        }
+      } catch (err) {
+        this.logger.warn('[chat] failed to record sent_message for stats:', err);
+      }
+    }
+
     if (firstSelf && hasReply && this.successfulMessagesRepo) {
       if (!this.successfulMessagesRepo.existsByMessage(firstSelf.text)) {
         const firstReply = chat.messages.find((m) => !m.isSelf);