feat: add task reward economy APIs

src/business/chat/chat.service.ts

@@ -40,6 +40,7 @@ import { LoginCoreService } from '../../core/login_core/login_core.service';
 import { ZulipAccountsService } from '../../core/db/zulip_accounts/zulip_accounts.service';
 import { ZulipAccountsMemoryService } from '../../core/db/zulip_accounts/zulip_accounts_memory.service';
 import { AccountProfileService } from '../auth/account_profile.service';
+import { TaskService } from '../tasks/task.service';
 
 // ========== 接口定义 ==========
 
@@ -262,6 +263,7 @@ export class ChatService {
     @Inject('ZulipAccountsService')
     private readonly zulipAccountsService: ZulipAccountsService | ZulipAccountsMemoryService,
     private readonly accountProfileService: AccountProfileService,
+    private readonly taskService: TaskService,
   ) {
     this.logger.log('ChatService初始化完成');
   }
@@ -445,6 +447,11 @@ export class ChatService {
           .catch(e => this.logger.warn('Zulip同步失败', { error: (e as Error).message }));
       }
 
+      if (normalizedScope === 'global') {
+        await this.taskService.recordActivity(BigInt(session.userId), 'public_message_sent')
+          .catch((error: unknown) => this.logger.warn('记录公共聊天任务失败', { error: error instanceof Error ? error.message : String(error) }));
+      }
+
       this.logger.log('聊天消息发送完成', {
         operation: 'sendChatMessage',
         messageId,