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/database/repositories.ts

@@ -15,7 +15,7 @@ export interface ProcessedPostRecord {
 
 export interface SentMessageRecord {
   id: number;
-  postId: string;
+  postId: string | null;
   recipient: string;
   subject: string;
   message: string;
@@ -23,6 +23,7 @@ export interface SentMessageRecord {
   gotResponse: boolean;
   responseCheckedAt: number | null;
   strategyId: string | null;
+  chatRoomId: string | null;
   subreddit?: string;
   postTitle?: string;
   postImageUrl?: string;
@@ -240,7 +241,9 @@ export class PostsRepository {
 
 export class MessagesRepository {
   private insertStmt: Database.Statement;
+  private insertChatStmt: Database.Statement;
   private getByPostIdStmt: Database.Statement;
+  private getByChatRoomIdStmt: Database.Statement;
   private getLatestByRecipientStmt: Database.Statement;
   private getRecentStmt: Database.Statement;
   private getUncheckedStmt: Database.Statement;
@@ -254,6 +257,20 @@ export class MessagesRepository {
       VALUES (?, ?, ?, ?, ?, ?)
     `);
 
+    this.insertChatStmt = db.prepare(`
+      INSERT INTO sent_messages (post_id, recipient, subject, message, sent_at, chat_room_id)
+      VALUES (NULL, ?, ?, ?, ?, ?)
+    `);
+
+    this.getByChatRoomIdStmt = db.prepare(`
+      SELECT sm.*, pp.subreddit, pp.title AS post_title, pp.image_url AS post_image_url,
+        pp.image_analysis AS post_image_analysis
+      FROM sent_messages sm
+      LEFT JOIN processed_posts pp ON sm.post_id = pp.id
+      WHERE sm.chat_room_id = ?
+      LIMIT 1
+    `);
+
     this.getByPostIdStmt = db.prepare(`SELECT * FROM sent_messages WHERE post_id = ?`);
 
     this.getLatestByRecipientStmt = db.prepare(`
@@ -316,12 +333,35 @@ export class MessagesRepository {
     return result.lastInsertRowid as number;
   }
 
+  insertChat(message: {
+    recipient: string;
+    subject: string;
+    message: string;
+    sentAt: number;
+    chatRoomId: string;
+  }): number {
+    const result = this.insertChatStmt.run(
+      message.recipient,
+      message.subject,
+      message.message,
+      message.sentAt,
+      message.chatRoomId,
+    );
+    return result.lastInsertRowid as number;
+  }
+
   getByPostId(postId: string): SentMessageRecord | undefined {
     const row = this.getByPostIdStmt.get(postId) as Record<string, unknown> | undefined;
     if (!row) return undefined;
     return this.mapRow(row);
   }
 
+  getByChatRoomId(chatRoomId: string): SentMessageRecord | undefined {
+    const row = this.getByChatRoomIdStmt.get(chatRoomId) as Record<string, unknown> | undefined;
+    if (!row) return undefined;
+    return this.mapRow(row);
+  }
+
   getLatestByRecipient(recipient: string): SentMessageRecord | undefined {
     const row = this.getLatestByRecipientStmt.get(recipient) as Record<string, unknown> | undefined;
     if (!row) return undefined;
@@ -422,7 +462,7 @@ export class MessagesRepository {
   private mapRow(row: Record<string, unknown>): SentMessageRecord {
     return {
       id: row.id as number,
-      postId: row.post_id as string,
+      postId: (row.post_id as string) ?? null,
       recipient: row.recipient as string,
       subject: row.subject as string,
       message: row.message as string,
@@ -430,6 +470,7 @@ export class MessagesRepository {
       gotResponse: Boolean(row.got_response),
       responseCheckedAt: row.response_checked_at as number | null,
       strategyId: (row.strategy_id as string) || null,
+      chatRoomId: (row.chat_room_id as string) ?? null,
       subreddit: (row.subreddit as string) || undefined,
       postTitle: (row.post_title as string) || undefined,
       postImageUrl: (row.post_image_url as string) || undefined,