fix(activity): File details menu fixes

[claucambra]

Resolves

The activity items' details menu being broken

Summary

After fix:

Screen.Recording.2026-07-29.at.19.20.39.mov

Before fix:

Screen.Recording.2026-07-29.at.16.00.12.mov

Checklist

• Sign-off message is added to all commits.
• The commit history is clean with no merge commits.
  • How to rebase your commits
  • How to squash commits with rebase
• Uploaded screenshots from before and after for UI changes.
• [] Test(s) added to branch, with before/after results included in PR description, for performance improvements where applicable.
• Documentation has been updated or is not required.
• Backports requested where applicable (critical bugfixes).
• Labels added where applicable (bug/enhancement).
• Milestone added for target version.

AI (if applicable)

• The content of this PR was partly or fully generated using AI
  • I have read the guidelines for AI-assisted contributions.
  • I have read Nextcloud's AI Contribution Policy.

[claucambra]

/backport to stable-34.0 please

[github-actions]

Artifact containing the AppImage: nextcloud-appimage-pr-10480.zip

Digest: sha256:bc9c215f5254412c4c52adc5a9a828fb9aa911884ae3987c49019d1e86f576d7

To test this change/fix you can download the above artifact file, unzip it, and run it.

Please make sure to quit your existing Nextcloud app and backup your data.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

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