HUD fixes: tested, one look fix, merged

A

Height limit (new)

Replies now grow the HUD only up to 520 px. Past that, the replies scroll inside the HUD.

Check in the installed app	Result
Opens at its normal 220 px, not a height saved from earlier growth	Pass
1,500 px of content: window stays at 520 px, content scrolls	Pass
The message box takes at most 40% of 520 px; long drafts scroll inside it	Covered by tests
Drag the HUD taller by hand	Still allowed

Shipped in ai #900 and platform #1973 (docs). Both are merged, so ai.allternit.com and the PWA get it. The installed Desktop already runs this UI.

B

Earlier in this round

The composer and the replies form one card with matching edges.
All 18 HUD audit fixes are merged and the Desktop build b6507 is installed.

# HUD fixes: tested, one look fix, merged

## Height limit (new)

Replies now grow the HUD only up to **520 px**. Past that, the replies scroll inside the HUD.

| Check in the installed app | Result |
|---|---|
| Opens at its normal 220 px, not a height saved from earlier growth | Pass |
| 1,500 px of content: window stays at 520 px, content scrolls | Pass |
| The message box takes at most 40% of 520 px; long drafts scroll inside it | Covered by tests |
| Drag the HUD taller by hand | Still allowed |

Shipped in ai #900 and platform #1973 (docs). Both are merged, so ai.allternit.com and the PWA get it. The installed Desktop already runs this UI.

## Earlier in this round

- The composer and the replies form one card with matching edges.
- All 18 HUD audit fixes are merged and the Desktop build b6507 is installed.