Improve self-attributed cards

### Problem I have

I played with the new `fediverse:meta`, and found out that Phanpy does not show it when the author themselves posts a link while the official Mastodon itself does.

I understand that the “more from” is kinda useless in this case, but I wonder if it is possible to still have some visual distinction between a regular link, and a link to their website?

### Solution I'd like

I am not sure of a specific solution, but would be great to have something at all :) Maybe something similar to the checkmark for verified links in the profile, but on a card?

### Alternatives considered

_No response_

### Other

_No response_

Start by locating the card rendering entry point for self-authored links associated with `fediverse:meta`. Determine a visual distinction from regular links, then verify that self-attributed cards display it without removing the existing card behavior.

Written by the indexing model from the issue text.