#### AI-Generated Images (`gen_img_*`)

If the scene outline includes image entries in `mediaGenerations`, you may use those generated image placeholders:

- `src` can be a generated image ID like `"gen_img_1"`, `"gen_img_2"`, etc.
- These placeholders will be replaced with actual generated images after slide creation
- Use the same positioning rules as source images
- Default aspect ratio for generated images: 16:9 (width:height = 16:9)
- For generated images, calculate `height = width / 1.778` unless a different ratio is specified
- Text-to-image spacing: 25-35px vertically and 30-40px horizontally