## Summary
Fix drag-and-drop of local screenshots onto the canvas failing to create
a LoadImage node.
## Changes
- **What**: Replace `_.isEmpty(workflowData)` check in `handleFile` with
a check for workflow-relevant keys (`workflow`, `prompt`, `parameters`,
`templates`). PNG screenshots often contain non-workflow `tEXt` metadata
(e.g. `Software`, `Creation Time`) which made `_.isEmpty()` return
`false`, skipping the LoadImage fallback and showing an error instead.
## Review Focus
The root cause is that `getPngMetadata` extracts all `tEXt`/`iTXt` PNG
chunks indiscriminately. Rather than filtering at the parser level
(which could break extensions relying on arbitrary metadata), the fix
checks for workflow-relevant keys before deciding whether to treat the
file as a workflow or a plain image.
Fixes#7752
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8886-fix-drag-and-drop-screenshot-creates-LoadImage-node-instead-of-showing-error-3086d73d3650817d86c5f1386aa041c2)
by [Unito](https://www.unito.io)
---------
Co-authored-by: github-actions <github-actions@github.com>
## Summary
<!-- One sentence describing what changed and why. -->
Added feature to drag and drop multiple images into the UI and connect
them with a Batch Images node with tests to add convenience for users.
Only works with a group of images, mixing files not supported.
## Review Focus
<!-- Critical design decisions or edge cases that need attention -->
I've updated our usage of Litegraph.createNode, honestly, that method is
pretty bad, onNodeCreated option method doesn't even return the node
created. I think I will probably go check out their repo to do a PR over
there. Anyways, I made a createNode method to avoid race conditions when
creating nodes for the paste actions. Will allow us to better
programmatically create nodes that do not have workflows that also need
to be connected to other nodes.
<!-- If this PR fixes an issue, uncomment and update the line below -->
https://www.notion.so/comfy-org/Implement-Multi-image-drag-and-drop-to-canvas-2eb6d73d36508195ad8addfc4367db10
## Screenshots (if applicable)
https://github.com/user-attachments/assets/d4155807-56e2-4e39-8ab1-16eda90f6a53
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8282-Batch-Drag-Drop-Images-2f16d73d365081c1ab31ce9da47a7be5)
by [Unito](https://www.unito.io)
---------
Co-authored-by: Alexander Brown <drjkl@comfy.org>
Co-authored-by: Austin Mroz <austin@comfy.org>
