- Create CreateOrderRequest DTO with jakarta.validation annotations
- Validate plate format (ABC123 or ABC12A) via @Pattern regex
- Validate letter text: @NotBlank, @Size(min=1, max=1000)
- Validate template name: optional, @Size(max=50)
- Add POST /api/orders endpoint to OrderController (auth required)
- Return 201 Created with OrderResponse on success
- Add 5 controller tests: no auth (403), create success, invalid plate,
empty text, text over 1000 chars
- All messages in Swedish (Ogiltigt registreringsnummer, Brevtext krävs, etc.)
Joakim Mörling
55f0fd8771