A redux selector is used to get the "default" IP Adapter. The selector uses the model list query result to select an IP Adapter model to be preset by default.
The selector is memoized, so if we mutate the returned default IP Adapter state, it mutates the result of the selector for all consumers.
For example, the `image` property of the default IP Adapter selector result is `null`. When we set the `image` property of the selector result while creating an IP Adapter, this does not trigger the selector to recompute its result. We end up setting the image for the selector result directly, and all other consumers now have that same image set.
Solution - we need to clone the selector result everywhere it is used. This was missed in a few spots, causing the issue.
It was easy to misunderstand the empty state for a regional guidance reference image. There was no label, so it seemed like it was the whole region that was empty.
This small change adds the "Reference Image" heading to the empty state, so it's clear that the empty state messaging refers to this reference image, not the whole regional guidance layer.
These helpers consolidate layer validation checks. For example, checking that the layer has content drawn, is compatible with the selected main model, has valid reference images, etc.
There's a technical challenge with outputting these values directly. `ImageField` does not store them, so the batch's `ImageField` collection does not have width and height for each image.
In order to set up the batch and pass along width and height for each image, we'd need to make a network request for each image when the user clicks Invoke. It would often be cached, but this will eventually create a scaling issue and poor user experience.
As a very simple workaround, users can output the batch image output into an `Image Primitive` node to access the width and height.
This change is implemented by adding some simple special handling when parsing the output fields for the `image_batch` node.
I'll keep this situation in mind when extending the batching system to other field types.
