fix: make tray account menu scrollable

[Rello]

Motivation

• The account dropdown menu in the tray could exceed the tray window height when many accounts exist, preventing access to other tray content and requiring the menu to become scrollable.

Description

• Added a contentItem ListView to the account Menu in src/gui/tray/CurrentAccountHeaderButton.qml that uses accountMenu.contentModel, clips content, uses Flickable.StopAtBounds, and provides a vertical ScrollBar with policy: ScrollBar.AsNeeded so the menu stays within the tray height.

Testing

• No automated tests were run for this UI-only change (manual UI validation expected during integration testing).

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Codex Task

[github-actions]

Artifact containing the AppImage: nextcloud-appimage-pr-9404.zip

Digest: sha256:b95fb5deeb4c8dd60a2d3cd7dab0a26780e8961ab6f8cfd615e8c81b87d42c7a

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