FitGrid lays items out in a grid sized to the box it is given and pages
the overflow sideways with dots, so a screen never scrolls vertically.
First consumer: tunedeck's home tab.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WzxdWZT4baL56wRDmNioxj
