[Studio] feat: add login and auth page

[zhaohai666]

Summary

Add login and authentication module for RocketMQ Studio, providing user login/logout REST API with JWT token support and Spring Security configuration placeholder.

Files Changed

7 files modified, total 427 line insertions

Source Files (5)

File	Lines	Description
auth/AuthController.java	44	REST controller, provides POST /api/auth/login and POST /api/auth/logout interfaces
auth/AuthService.java	60	Authentication service layer, implements credential verification, mock JWT token generation and admin identity judgment logic
auth/LoginDTO.java	26	Login request DTO, contains username and password fields
auth/LoginVO.java	42	Login response VO, carries token, expiration time and nested user information (username, admin identity flag)
auth/SecurityConfig.java	25	Spring Security configuration class marked with @configuration, reserved placeholder (TODO: complete after introducing related dependencies)

Test Files (2)

File	Lines	Description
auth/AuthControllerTest.java	115	WebMvcTest for controller layer: verify normal login token return, admin identity identification and logout success logic
auth/AuthServiceTest.java	115	Mockito unit test for service layer: verify valid credential login, admin flag judgment, empty username/password parameter verification and logout logic

Key Design

1. API Endpoints

• POST /api/auth/login: Return unified response Result<LoginVO> carrying mock JWT token
• POST /api/auth/logout: Return unified empty response Result<Void>

2. Parameter Validation
   Throw BusinessException with error code 400 when username or password is null or blank
3. Mock Authentication Logic

• Accept any non-empty username and password combination to generate mock token in format mock-jwt-{UUID}
• Mark user as admin if username is exactly admin

4. Unified Response Standard
   Reuse Result<T> wrapper and global BusinessException defined in common module to keep consistent API return format

Dependencies

Depends on PR#1 (feature/studio-common-foundation), relies on the unified response Result and global business exception BusinessException provided by the common foundation module

Test Coverage

• AuthControllerTest: 3 test cases (normal login, admin user login, logout)
• AuthServiceTest: 7 test cases (valid login, admin identity judgment, 4 parameter validation error scenarios, logout)

PR Title Rule Reminder

All PR and Issue titles of this project must start with [studio] for community quick filtering and tracking.
Example: [studio] feat: add login and JWT authentication module