fix(createReport): early return on cancel in prompt

[Billuc]

Context

The createReportDialogPrompt is used to store/export DICOM SEGs. Currently, data is stored whether one click on 'Save' or 'Cancel'. The desired behaviour is that nothing happens if the "Cancel" button is clicked;

Changes & Results

• Fixed a condition for an early return in storeSegmentation (the function that creates the report)
• Added an early return in createReportAsync if no report has been created
  • [x] My Pull Request title is descriptive, accurate and follows the semantic-release format and guidelines.

  Code

  • [x] My code has been well-documented (function documentation, inline comments, etc.)

  Public Documentation Updates

  • [x] The documentation page has been updated as necessary for any public API additions or removals.

  Tested Environment

  • [x] OS: Fedora 40
  • [x] Node version: 18.20.3
  • [x] Browser: Chromium Version 126.0.6478.55 (Official Build) Fedora Project (64-bit)

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