fix(nav): remove blue gradient background from network players

Removed the decorative blue/purple/pink gradient "network frame border" that
was showing around remote player avatars. This background was not requested
and is unnecessary with the current turn indicator system.

Also cleaned up unused hover state tracking that was only used for the frame.

Network players now display cleanly with just their emoji and the network
badge (📡), showing the turn indicator border only when it's their turn.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/web/src/components/nav/NetworkPlayerIndicator.tsx

@@ -30,7 +30,6 @@ export function NetworkPlayerIndicator({
   playerScores = {},
   playerStreaks = {},
 }: NetworkPlayerIndicatorProps) {
-  const [isHovered, setIsHovered] = React.useState(false)
   const playerName = player.name || `Network Player ${player.id.slice(0, 8)}`
   const extraInfo = player.memberName ? `Controlled by ${player.memberName}` : undefined
   const isOnline = player.isOnline !== false // Default to online if not specified
@@ -78,30 +77,7 @@ export function NetworkPlayerIndicator({
             justifyContent: 'center',
             opacity: hasGameState ? (isCurrentPlayer ? 1 : 0.65) : 1,
           }}
-          onMouseEnter={() => setIsHovered(true)}
-          onMouseLeave={() => setIsHovered(false)}
         >
-        {/* Network frame border - only show when not current player */}
-        {!isCurrentPlayer && (
-          <div
-            style={{
-              position: 'absolute',
-              inset: '-8px',
-              borderRadius: '12px',
-              background: `
-              linear-gradient(135deg,
-                rgba(59, 130, 246, 0.5),
-                rgba(147, 51, 234, 0.5),
-                rgba(236, 72, 153, 0.5))
-            `,
-              opacity: isHovered ? 1 : 0.8,
-              transition: 'opacity 0.2s ease',
-              boxShadow: '0 6px 16px rgba(59, 130, 246, 0.3)',
-              zIndex: -1,
-            }}
-          />
-        )}
-
         {/* Turn indicator border ring - show when current player */}
         {isCurrentPlayer && hasGameState && (
           <div