SVG export with title and description produces invalid XML

[JensVoss0253]

Describe the bug

To Reproduce

1. Import the attached .egn file.
2. Export the story as SVG with option "Add title and description to image" selected.
3. Open exported file with text editor
4. See garbage XML (starting with "<?xml version<g class=..."

Expected behavior
Exported file is valid XML (and valid SVG)

Screenshots
Resulting file is also attached to issue

Version

• Egon: v2.3.0
• Browser: Firefox 133.0, Chrome 131.0
• OS: Windows 11
  Foo_2025-01-06.zip
  

[hofstef]

Seems only to occur if there are no activities modeled in the story. That's probably an edge case that many users will never encounter but is should still be fixed.

[hofstef]

fixed in v2.4.0