Screenshot of the Measures panel after a referenced base measure has been renamed. Panel table lists three measures; the "gross_margin_pct" row carries a red "Invalid" pill in the Status column and a tooltip popover open showing "Referenced measure `gross_margin` not found. Hidden from catalogue until fixed." The row's edit icon is highlighted to invite a click. Dimensions: 1280x600px. Purpose: show business users what a broken calculated measure looks like and reassure them the fix is a name edit, not data loss.