fix: scroll tall Confirm body inside the pink card

[ajlennon]

Summary

• Confirm body text now scrolls inside the pink card (title + border stay fixed), matching the Windows approach.
• Removes the length/newline threshold and ellipsis path that left medium WhatsApp confirms cut off by the options list after fix: stop clipping Confirm card bottom border #28.
• Short bodies still size naturally via propagate_natural_height; tall ones cap at ~180px with a scrollbar.

Test plan

• Smoke-tested tall WhatsApp-style Confirm — scrollbar works, full text reachable
• Short Confirm (1–2 lines) — pink border fully visible, no empty scroll chrome
• Medium Confirm (From/To/Cc/Subject) — no clipping under options
• Cancel/OK remain pinned and clickable

Made with Cursor