From a screenshot at a non-default font scale: the red WARNING box clipped its text
("...balance, but" cut off) because it used a fixed 80px child height while the text inside
scales with the font. Make the warning box auto-size to its content (ImGuiChildFlags_AutoResizeY)
so it never clips at any scale, and scale the address / key read-only field heights by
Layout::dpiScale() for the same reason. Complements the card-width scaling fix.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>