feat(data): add paywall payment APIs

src/data/repositories/chat_repository.ts

@@ -21,6 +21,8 @@ import {
   ChatMessage,
   ChatSendResponse,
   SendMessageRequest,
+  UnlockPrivateRequest,
+  UnlockPrivateResponse,
 } from "@/data/dto/chat";
 import { Result } from "@/utils";
 import type { IChatRepository } from "@/data/repositories/interfaces";
@@ -57,6 +59,15 @@ export class ChatRepository implements IChatRepository {
     return Result.wrap(() => this.api.getHistory(limit, offset));
   }
 
+  /** 解锁私密消息。 */
+  async unlockPrivateMessage(
+    messageId: string,
+  ): Promise<Result<UnlockPrivateResponse>> {
+    return Result.wrap(() =>
+      this.api.unlockPrivateMessage(UnlockPrivateRequest.from({ messageId })),
+    );
+  }
+
   // ============ 本地（Dexie）操作 ============
 
   /** 把一条消息写入本地存储。 */