Important product suggestion, AI model control is missing in Studio Image Node

Add model selection directly inside the AI Image node, including image model, provider, quality level, aspect ratio, API/credit billing route, and fallback behaviour.

Also show which provider is currently being used before generation starts, so users understand whether the workflow is using their own API key or Remalt credits.

This would make Studio more reliable, transparent, and useful for professional creative workflows. Right now, the lack of model control is a real limitation.