What problem does this address?

#235 introduced image generation within the block editor. The next step is to extend this functionality into the Media Library so users can generate images outside of the editor context.

What is your proposed solution?

• Add a secondary submenu item under Media in wp-admin for Generate Image
• Add an action button for Generate Image in the Media Library header, positioned alongside the Add Media File button
• Ensure the flow works independently of the block editor context
• Reuse shared generation logic where possible while introducing an admin-specific UI layer/flow