Image Generation Test

Test the image generation API endpoint with a Trailhead username.

Run the image test script which will:

1. Check if dev server is running (required)
2. Call POST /api/banner/standard with username (default: nabondance)
3. Show response status, timing, and key details
4. Validate image generation succeeded

Usage: /img-test (uses default username) or /img-test <username>

Execute: bash ../img-test.sh "$@"