Copy/Paste SVG image don't keep all attributes (texts lines in box)

[droumanet]

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Describe the bug
The appearance of text in box isn't the same in draw.io and in LibreOffice Writer when using copy as SVG

To Reproduce
Steps to reproduce the behavior:

1. Start a new diagram
2. Use a simple box in diagram
3. Write a long text (text fit in the box width)
4. Copy as SVG
5. Paste in LibreOffice

Expected behavior
Appearance must be the same

Screenshots

draw.io version (In the Help->About menu of the draw.io editor):

• draw.io version 29.5.2

Desktop (please complete the following information):

• OS: Linux Manjaro

Additional context
Paste in Inkscape isn't usable, idem with LibreOffice Draw and OnlyOffice.
Export as SVG works fine, maybe it's clipboard type that is a problem...

[draw-io-triage-bot]

👋 Thank you for opening this issue!

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Summary: When using 'Copy as SVG' and pasting into external applications (LibreOffice Writer, Inkscape, LibreOffice Draw, OnlyOffice), multi-line text inside boxes renders differently than in draw.io — text wrapping and layout attributes are not preserved. Exporting as SVG file works correctly, suggesting the clipboard SVG generation pathway produces different/incomplete SVG compared to the file export pathway.

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🔍 Possible Related Issues

This issue might be related to existing issues:

🟡 #240 - Support Copy PNG/SVG/.. to clipboard
This issue is about the SVG clipboard copy feature itself. The current bug suggests the clipboard SVG output differs from the file export SVG output, which may relate to how the copy-to-clipboard SVG generation was implemented.

Please check if any of these address your issue. If this is a duplicate, we may close this issue and continue the conversation there.

📝 Additional Information Needed

To help us investigate this more effectively, could you please provide:

• Can you share the actual SVG content from the clipboard (e.g., by pasting into a text editor) versus the SVG content from 'Export as SVG'? Comparing the two would help pinpoint what attributes or styling are missing in the clipboard version.
• Does the issue occur with all text wrapping scenarios, or only when the text is long enough to wrap to multiple lines within the box?
• Have you tried using 'Edit → Copy as SVG' versus right-click → 'Copy as SVG' — do both produce the same result?

📋 Bug Report Template

**Environment:**
- draw.io version: [e.g., web app / desktop 24.x.x / Confluence plugin]
- Browser (if web): [e.g., Chrome 120, Firefox 121]
- OS: [e.g., Windows 11, macOS 14, Ubuntu 22.04]

**Steps to Reproduce:**
1. Go to ...
2. Click on ...
3. See error

**Expected Behavior:**
What you expected to happen.

**Actual Behavior:**
What actually happened.

**Screenshots/Files:**
If applicable, add screenshots or attach the .drawio file.

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_{🤖 This is an automated response to help with initial triage. A human maintainer will review this issue. If you've provided all the requested information, no further action is needed - we'll get back to you soon!}

[alderg]

See https://www.drawio.com/doc/faq/svg-export-text-problems and jgraph/drawio#5165