Remove option to convert incoming document to attachment

[eriksson-daniel]

No description provided.

[Copilot]

Pull Request Overview

This PR removes the option to convert incoming documents to attachments by eliminating associated logic. Key changes include:

• Removing drag‐and‐drop conversion logic for incoming documents in use-can-drop-on-document.ts.
• Updating the SetParentDocument component by removing the parentDocument prop and isIncomingDocument logic.
• Adjusting DocumentModalContent to pass the updated prop structure to SetParentDocument.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
frontend/src/hooks/use-can-document/use-can-drop-on-document.ts	Removed conversion logic for incoming documents in drag/drop functionality.
frontend/src/components/documents/new-documents/modal/set-parent.tsx	Eliminated unused parentDocument prop and cleaned up isIncomingDocument references in SetParentDocument.
frontend/src/components/documents/new-documents/modal/modal-content.tsx	Updated SetParentDocument prop usage in accordance with component changes.

Comments suppressed due to low confidence (1)

frontend/src/hooks/use-can-document/use-can-drop-on-document.ts:63

• Add test cases to validate the updated drag-and-drop behavior now that the conversion logic for incoming documents has been removed.

if (isTildeltSaksbehandler || hasOppgavestyringRole || (isFullfoert && hasSaksbehandlerRole)) {