pagina da dashboard com cards

lib/grafico de pizza/dados_grafico.dart

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+class PieChartData {
+  final int victories;
+  final int defeats;
+  final int draws;
+
+  const PieChartData({
+    required this.victories,
+    required this.defeats,
+    this.draws = 0,
+  });
+
+  int get total => victories + defeats + draws;
+  
+  double get victoryPercentage => total > 0 ? victories / total : 0;
+  double get defeatPercentage => total > 0 ? defeats / total : 0;
+  double get drawPercentage => total > 0 ? draws / total : 0;
+
+  Map<String, dynamic> toJson() => {
+    'victories': victories,
+    'defeats': defeats,
+    'draws': draws,
+    'total': total,
+    'victoryPercentage': victoryPercentage,
+    'defeatPercentage': defeatPercentage,
+  };
+}