Page conversation panel overflows horizontally

With a page open and the page conversation side panel showing, the panel content is wider than the viewport at ~1320 px: message bubbles and the review card are clipped on the right and a horizontal scrollbar appears.

How we hit it: opened a page, sent a message from "Ask about this page…", waited for the review card.

Env: Docker Compose (compose.yml + computers overlays), main @ c2569bb, OPENAI_MODEL=gpt-5.4-mini, Chromium.