Adds a card() surface (white rounded panel, 1px #C8D4E3 stroke, 8px radius) matching the light-Windows spec, and groups the monitor (video / status+ controls / gallery) and settings (camera / params / deps) into cards so the gray-blue page shows through the gutters. Components were previously flat on one background with no separation. Cross-compiles for Windows. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>