Fullscreen TUI does not receive mouse-wheel scrolling events

Environment

• Paseo: 0.5.2
• OS: Windows 11 10.0.26100
• Shell: cmd.exe
• Affected application: pi CLI
• pi TUI mode: fullscreen

Reproduction

1. Open Paseo and start pi in fullscreen mode:

   cmd复制

   pi --tui-mode fullscreen

2. Generate enough transcript content to make scrolling necessary.

3. Move the mouse pointer over the transcript area.

4. Use the mouse wheel.

Expected behavior

The fullscreen transcript scrolls vertically under the mouse pointer.

Actual behavior

The mouse wheel does not scroll the fullscreen transcript. No visible scrolling occurs.

Keyboard scrolling works in the same session:

• PageUp scrolls up.
• PageDown scrolls down.

This indicates that pi's fullscreen transcript and scroll handling work, but the mouse-wheel event is not reaching the TUI or is not being forwarded correctly by Paseo.

Additional context

• This occurs in Paseo 0.5.2.
• The issue is observed with pi fullscreen mode; regular mode uses different terminal scrollback behavior.
• PageUp/PageDown work, so this is specifically a mouse-wheel input issue.
• Please let me know if a minimal non-pi alternate-screen reproduction is useful.