🍱 Interactive widget

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

Currently, there is no way to embed or link contacts within say Collectives. For example, when documenting company processes or creating wiki pages that reference specific people, it isn’t possible to link to a contact from a shared contact list. Similarly, in personal note-taking or task planning, users cannot link directly to contacts from their own address book.

Describe the solution you'd like

Just like other embedded features (e.g. calendar or board embedding), it would be very useful to have a way to embed or link contacts from the Nextcloud Contacts app.

The workflow could be similar to other slash commands:

• Typing a slash (/) followed by the contact’s name opens a dropdown list of matching contacts.
• The user can then select the correct contact using the Tab key and confirm with Enter.
• Once inserted, the contact appears as a clickable link in the format Firstname Lastname
• Hovering over the link would display a small popup with the contact’s key information (e.g. email address, phone number).
• Clicking the link would open the full contact in the Contacts app.

Describe alternatives you've considered

Manually writing out contact details each time is possible but inefficient and error-prone, especially when multiple documents reference the same person.

Mockup

Below is a mock-up (created with ChatGPT) showing how the embedded contact might look when hovering over a linked contact name.

Additional context

https://github.com/nextcloud/server/issues/42550

Start by reviewing the linked Nextcloud server issue and the Contacts app's existing calendar or board embedding workflows; no files or tests are named in this issue. Done would include contact search via slash command, keyboard selection, clickable contact links, hover details, and opening the contact in the Contacts app.