feat(characters): support character-scoped conversations

src/data/services/api/private_room_api.ts

@@ -3,13 +3,14 @@ import {
   PrivateAlbumUnlockResponse,
   UnlockPrivateAlbumRequest,
 } from "@/data/dto/private-room";
+import { DEFAULT_CHARACTER_ID } from "@/data/constants/character";
 
 import { ApiPath } from "./api_path";
 import { httpClient } from "./http_client";
 import { type ApiEnvelope, unwrap } from "./response_helper";
 
 export interface GetPrivateAlbumsInput {
-  character?: string;
+  characterId?: string;
   limit?: number;
 }
 
@@ -21,7 +22,7 @@ export class PrivateRoomApi {
       ApiPath.privateRoomAlbums,
       {
         query: {
-          character: input.character ?? "elio",
+          characterId: input.characterId ?? DEFAULT_CHARACTER_ID,
           limit: input.limit ?? 20,
         },
       },