Inventory App (Java 17, Spring Boot, MySQL)

This is a starter inventory management REST API using Java 17, Spring Boot, JPA (MySQL), and JWT-based authentication.

Features:

• User signup and login (returns JWT)
• Roles: ROLE_USER, ROLE_ADMIN (seeded admin/admin123 and user/user123)
• Product and Category entities (seeded sample products)
• AI endpoint /api/ai/recommendations — rule-based reorder suggestions (low-stock)
• CommandLineRunner seeds categories and products on first run

How to run locally (IntelliJ + MySQL):

1. Ensure MySQL is running and create a database inventory_db or let the app create it (configured in application.yml).
2. Update src/main/resources/application.yml with your MySQL username/password.
3. Import the project into IntelliJ as a Maven project.
4. Run mvn spring-boot:run or run InventoryApplication.java.
5. API:
   • POST /api/auth/signup { "username":"new","password":"pwd" }
   • POST /api/auth/login { "username":"user","password":"user123" }
   • Use Authorization: Bearer <token> for protected endpoints.
   • GET /api/products
   • GET /api/ai/recommendations?threshold=25

Notes:

• JWT secret in application.yml is for demo only — change for production.
• There is a placeholder for OpenAI integration in application.yml; currently the AI endpoint is rule-based.