这是JSDocs，来自node_modules/@nestjs/common/decorators/core/controller.decorator.d.ts
如果按住Ctrl键并单击@Controller（转到定义），则应获得：

/**
 * Decorator that marks a class as a Nest controller that can receive inbound
 * requests and produce responses.
 *
 * An HTTP Controller responds to inbound HTTP Requests and produces HTTP Responses.
 * It defines a class that provides the context for one or more related route
 * handlers that correspond to HTTP request methods and associated routes
 * for example `GET /api/profile`, `POST /users/resume`.
 *
 * A Microservice Controller responds to requests as well as events, running over
 * a variety of transports [(read more here)](https://docs.nestjs.com/microservices/basics).
 * It defines a class that provides a context for one or more message or event
 * handlers.
 *
 * @see [Controllers](https://docs.nestjs.com/controllers)
 * @see [Microservices](https://docs.nestjs.com/microservices/basics#request-response)
 *
 * @publicApi
 */
export declare function Controller(): ClassDecorator;

这意味着您已经在本地存储库中安装了@nestjs/common包。

确保未安装冲突的VS代码扩展/代码段/插件。