feat: Update how messages load and sync, allow plugins to import messages

toju-app/src/app/infrastructure/persistence/electron-database.service.ts

@@ -42,9 +42,21 @@ export class ElectronDatabaseService {
    * @param roomId - Target room.
    * @param limit  - Maximum number of messages to return.
     * @param offset - Number of newer messages to skip (for pagination).
+   * @param channelId - Optional channel scope; 'general' includes null/empty.
+   * @param beforeTimestamp - Optional cursor; only messages strictly older
+   *                          than this timestamp are returned (scroll-up paging).
    */
-  getMessages(roomId: string, limit = 100, offset = 0): Promise<Message[]> {
-    return this.api.query<Message[]>({ type: 'get-messages', payload: { roomId, limit, offset } });
+  getMessages(
+    roomId: string,
+    limit = 100,
+    offset = 0,
+    channelId?: string,
+    beforeTimestamp?: number
+  ): Promise<Message[]> {
+    return this.api.query<Message[]>({
+      type: 'get-messages',
+      payload: { roomId, limit, offset, channelId, beforeTimestamp }
+    });
   }
 
   getMessagesSince(roomId: string, sinceTimestamp: number): Promise<Message[]> {