Add ChessPlayerChip.kt with three shared composables:
- ChessPlayerChip: single player avatar + name with active border
- ChessPlayerVsHeader: mirrored White vs Black header above the board
- OverlappingAvatars: compact overlapping circular avatars for list cards
Wire avatars into:
- LiveChessGameScreen: vs header with active player green border
- DesktopChessGameLayout: vs header above the chess board
- Android & Desktop lobby cards: overlapping avatars in ActiveGameCard,
ChallengeCard, and OutgoingChallengeCard avatar slots
Uses existing UserAvatar (coil3 AsyncImage + Robohash fallback) from
commons for KMP compatibility.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
davotoula
006a2229fe