Fix residual color artifacts around title bar icon in screenshots

Previous screenshot edits left remnant pixels from the old glyph
(at x=29-32 and below the icon). Clear a larger area (x=5..38,
y=1..28) before placing the clean icon to remove all artifacts.

https://claude.ai/code/session_01J4whZ2FE8DHRZJo7tZeW5m

Author: claude