v3.21.185
Custom background: editor fields for angle/size + value validation
- add gradient angle (0-360) and watermark size (40/60/80/contain) editor fields
and a help hint for the watermark URL - validate/clamp: gradient angle (normalizeGradientAngle), watermark opacity 0-1,
size to safe values; remove empty fields from config instead of storing them - the watermark already reaches every shell card (Countdown/Match Center/Team
Competitions render the background via renderCardHero); no per-card change