fix: improve standup chat auto-scroll

[idoshamun]

What changed

• make the standup live-chat panel follow long newly-added messages after layout settles instead of stopping on the first visible line
• pause auto-scroll while the user is actively scrolling the chat pane, then catch up once scrolling goes idle if they are still pinned near the bottom
• add focused coverage for both the long-message and user-scrolling behaviors

Why

Long comments could increase the message height after the previous one-shot scroll adjustment, leaving the bottom lines hidden. The chat also kept treating "near bottom" as enough to auto-scroll even while the user was interacting with the scroller.

Impact

Standup chat on /standups/[id] keeps the newest full message visible without fighting users who are reading earlier messages.

Validation

• pnpm --filter @dailydotdev/shared exec eslint src/components/liveRooms/LiveRoomChatPanel.tsx src/components/liveRooms/LiveRoomChatPanel.spec.tsx
• NODE_ENV=test pnpm --filter @dailydotdev/shared exec jest src/components/liveRooms/LiveRoomChatPanel.spec.tsx --runInBand
• NODE_ENV=test pnpm --filter @dailydotdev/shared exec jest src/components/liveRooms/LiveRoom.spec.tsx --runInBand
• node ./scripts/typecheck-strict-changed.js

Preview domain

https://codex-standup-chat-auto-scroll.preview.app.daily.dev

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Project	Deployment	Actions	Updated (UTC)
daily-webapp	Ready	Preview	May 12, 2026 1:26pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
storybook	Ignored		May 12, 2026 1:26pm