Easy Contact Sharing

Is your feature request related to a problem? Please describe.

This issue is related to the issue #111 as posted by @PackElend.
Currently, sharing contact information in the Nextcloud Contacts app is somewhat cumbersome. There is no straightforward way to quickly share a contact’s details with others or to copy individual pieces of information (like an email address or phone number) directly from the contact view. The existing “download .vcf” option is somewhat hidden in the three-dots menu and does not cover other sharing needs.

Describe the solution you'd like

I would like to have a share option next to the edit option on every contact page, represented by the common share icon (three connected dots).

When clicking the share button, several sharing options should appear:

• Copy contact info to clipboard – copies all visible contact details as text.
• Download .vcf – moves this option from the existing three-dots menu to the new share menu.
• Share via email – sends the contact as a vCard (.vcf) attachment.
• Share via other communication apps (e.g., Nextcloud Talk) – allows sending the contact as a vCard (.vcf) using supported communication integrations.

Additionally, there should be a small copy icon next to every individual contact field (e.g., email address, phone number) to quickly copy that specific piece of information to the clipboard.

This would make sharing and using contact data much faster and more intuitive.

Describe alternatives you've considered

• Continuing to use the “download .vcf” option hidden in the existing menu — this works but is not very convenient or discoverable.
• Manually copying text fields — possible but inefficient and error-prone

Additional context

Start by reviewing the contact page, the edit and existing three-dots menu, including its download .vcf option. Trace the contact fields and available sharing integrations before defining the scope. Done would include the requested share actions and per-field copy controls, with the existing download option moved into the share menu.