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