新增训练计划模块，包括控制器、服务、模型及数据传输对象，更新应用模块以引入新模块，同时在AI教练模块中添加体态评估功能，支持体重识别与更新，优化用户体重历史记录管理。

src/ai-coach/ai-coach.module.ts

@@ -5,13 +5,14 @@ import { AiCoachController } from './ai-coach.controller';
 import { AiCoachService } from './ai-coach.service';
 import { AiMessage } from './models/ai-message.model';
 import { AiConversation } from './models/ai-conversation.model';
+import { PostureAssessment } from './models/posture-assessment.model';
 import { UsersModule } from '../users/users.module';
 
 @Module({
   imports: [
     ConfigModule,
     UsersModule,
-    SequelizeModule.forFeature([AiConversation, AiMessage]),
+    SequelizeModule.forFeature([AiConversation, AiMessage, PostureAssessment]),
   ],
   controllers: [AiCoachController],
   providers: [AiCoachService],