Open challenge host
Fixed table chip for the signed-in open play seek. Product APIs are same-origin /api/play/challenge/mine, so this showcase is chrome-only.
Product Edge pages mount EdgeTrAccount in the TR slot and a layout-levelOpenChallengeHost overlay. The chip sits left of Share, Feedback, and profile (placement="overlay" on this demo). CBL /browser usesplacement="inline" in the native titlebar instead. Study TR passesplayOrigin into EdgeTrAccount (placement="toolbar") and skips the layout overlay. **<768px** those chips collapse into a labeled avatar menu. Home/ signed-in uses overflowOnly at every width — sameTrOverflowMenu as phone. Idle Play online opens the New game overlay in place (no navigation). Claimed state uses aria-live="assertive" and pulses. Product APIs are same-origin, so this showcase is chrome-only.