When looking at an invite, I should be able to see the full-size avatar of the user making the invite.

### Your use case

#### What would you like to do?

See who is inviting me before I accept.

#### Why would you like to do it?

#### How would you like to achieve it?

Let me see the avatar at least.

### Have you considered any alternatives?

Should an invitee be able to peek the room? Obviously there is already the problem of peeking over federation.

### Additional context

_No response_

No implementation file, client, entry point, or test is named. First identify which Element client renders invites and trace the invite display to the existing avatar component; confirm how invite data exposes the inviter's avatar. Done means an invitee can open the inviter's avatar at full size before accepting, with coverage for the invite view.

Written by the indexing model from the issue text.