Problem

• Mouse wheel events were scheduling a redraw on every event, which could backlog and create lag during fast scrolling.

Solution

• Schedule transcript scroll redraws with a short delay (16ms) so the frame requester coalesces bursts into fewer draws.

Why

• Smooths rapid wheel scrolling while keeping the UI responsive.

Testing

• Manual: Scrolled in iTerm and Ghostty; no lag observed.
• cargo clippy --fix --all-features --tests --allow-dirty --allow-no-vcs -p codex-tui2