show the attachment name with an extension when sharing or opening from another app

Description

Cherry pick the commit from upstream which fixes not able to share pdf files from mail app.

Cherry picked from here

Issues

https://gitlab.e.foundation/e/backlog/-/issues/8008

10 commandments of code review

👪 ❤️ https://gitlab.e.foundation/groups/e/-/wikis/contribute/development-processes/code-review-guidelines

Summary by CodeRabbit

• New Features

  • Improved handling of attachment display names when generating temporary URIs for attachments.

• Bug Fixes

  • Enhanced compatibility and reliability when viewing attachments by ensuring display names are included in temporary file handling.