Enable SVG import destination options when dragging into canvas

[kanishk6103]

Closes #3253

[kanishk6103]

Here is a video demo of the included changes:

2025-10-16.21-10-43_muted.mp4

@KeatonTech @timon-schelling

[TrueDoctor]

Here is a video demo of the included changes:
2025-10-16.21-10-43_muted.mp4

I think you meant to ping @Keavon

[TrueDoctor]

Also we should probably zoom in on the imported svg once it is loaded right? similar to how that is done when creating a new document

[Keavon]

I can't review it yet but as a quick note, please use Title Case in menus.

[timon-schelling]

Note, Drag events are not forwarded to CEF on desktop (and I would prefer keeping it that way), this will basically not work on desktop.
And other images files should work the same way.

A better flow would be:

• Frontend (desktop or web) receives a file drop and sends a OpenImportDialogMessage
• Editor responds with the corresponding dialog layout.
• User selects new document or new layer from the dialog (maybe cancel could be an option).
• Editor sends a import file message with a flag set for new document or new layer (or enum)
• Frontend reads file and responds with a import file message passing along the new document flag.

This should also include unifying import via menu and via file drop.

[kanishk6103]

Note, Drag events are not forwarded to CEF on desktop (and I would prefer keeping it that way), this will basically not work on desktop. And other images files should work the same way.

A better flow would be:

• Frontend (desktop or web) receives a file drop and sends a OpenImportDialogMessage
• Editor responds with the corresponding dialog layout.
• User selects new document or new layer from the dialog (maybe cancel could be an option).
• Editor sends a import file message with a flag set for new document or new layer (or enum)
• Frontend reads file and responds with a import file message passing along the new document flag.

This should also include unifying import via menu and via file drop.

oh, I understand, valid points. I'll try implementing this flow and make the required changes.