Leave Room Dialogue: Last member

### Your use case

#### What would you like to do?
- State the room name in bold and in quotations.
- Remove red colour from body text.
- Remove "the room" from body.
- Remove "in the future".
- Simplify "person here" to "member".
- Remove white fill from secondary button: use outline button.

#### How would you like to achieve it?
- **Enhance Dialogue:**
> ### Leave room
> Are you sure you want to leave 'room name'? You are the only member. If you leave, no one will be able to join, including you.

### Alternatives?

### 1.
**(prefer this one)*
> ### Leave '*room-name*'?
> You are the only member. If you leave, no one will be able to join, including you.

- Add a question mark to header: "Leave room?"
- Replace "room" with "**room-name**"

### Additional context

This red text is harder to see/read, please remove/alter (the colour).
*Preferably make the text colour match the rest*.

Start by locating the Leave Room dialogue entry point in the frontend and compare its current copy and controls with the preferred alternative in this issue. Update the room-name formatting, wording, text colour, and secondary button styling, then verify the dialogue visually and confirm the last-member warning remains clear.

Written by the indexing model from the issue text.