v1.1.1 - Brand icon

Add a brand icon for the card.

• brand/icon.png (256×256) and brand/icon@2x.png (512×512)
• Card variant of the ring-intercom-video backend icon: same Ring-blue outer ring (family trait), with a card/screen silhouette inside — play triangle + pick up button — and the red REC dot as the shared cue.
• Transparent background.