feat: Mejorar diseño del botón de salir de la partida

- Mover botón de arriba-izquierda a arriba-derecha
- Cambiar color de amarillo a verde (bg-green-800)
- Cambiar icono de flecha por icono de casita (home)
- Cambiar texto de 'Salir' a 'Lobby'
- Actualizar tooltip a 'Volver al lobby'

client/src/components/ExitGameButton.tsx

@@ -20,23 +20,25 @@ export default function ExitGameButton({ onExit, playerName }: ExitGameButtonPro
                 onClick={() => setShowConfirm(true)}
                 whileHover={{ scale: 1.05 }}
                 whileTap={{ scale: 0.95 }}
-                className="fixed top-4 left-4 z-50 bg-yellow-900/80 hover:bg-yellow-800 text-white p-3 rounded-lg border border-yellow-700/50 backdrop-blur-sm shadow-lg transition-all group"
-                title="Abandonar partida"
+                className="fixed top-4 right-4 z-50 bg-green-800/80 hover:bg-green-700 text-white p-3 rounded-lg border border-green-600/50 backdrop-blur-sm shadow-lg transition-all group"
+                title="Volver al lobby"
             >
                 <div className="flex items-center gap-2">
                     <svg
                         xmlns="http://www.w3.org/2000/svg"
-                        className="h-5 w-5"
-                        viewBox="0 0 20 20"
-                        fill="currentColor"
+                        fill="none"
+                        viewBox="0 0 24 24"
+                        strokeWidth={2}
+                        stroke="currentColor"
+                        className="w-5 h-5"
                     >
                         <path
-                            fillRule="evenodd"
-                            d="M9.707 16.707a1 1 0 01-1.414 0l-6-6a1 1 0 010-1.414l6-6a1 1 0 011.414 1.414L5.414 9H17a1 1 0 110 2H5.414l4.293 4.293a1 1 0 010 1.414z"
-                            clipRule="evenodd"
+                            strokeLinecap="round"
+                            strokeLinejoin="round"
+                            d="M2.25 12l8.954-8.955c.44-.439 1.152-.439 1.591 0L21.75 12M4.5 9.75v10.125c0 .621.504 1.125 1.125 1.125H9.75v-4.875c0-.621.504-1.125 1.125-1.125h2.25c.621 0 1.125.504 1.125 1.125V21h4.125c.621 0 1.125-.504 1.125-1.125V9.75M8.25 21h8.25"
                         />
                     </svg>
-                    <span className="text-xs font-bold uppercase tracking-wider hidden md:inline">Salir</span>
+                    <span className="text-xs font-bold uppercase tracking-wider hidden md:inline">Lobby</span>
                 </div>
             </motion.button>