Refactor Index page component

The Index page component was refactored into smaller, more manageable components to improve code readability and maintainability.

src/components/home/EmptyState.tsx

@@ -0,0 +1,21 @@
+
+import React from 'react';
+
+interface EmptyStateProps {
+  message?: string;
+  subMessage?: string;
+}
+
+const EmptyState: React.FC<EmptyStateProps> = ({ 
+  message = "아직 데이터가 없습니다", 
+  subMessage = "예산을 설정하고 지출을 추가해 보세요" 
+}) => {
+  return (
+    <div className="neuro-card py-8 text-center text-gray-400 mb-4">
+      <p>{message}</p>
+      <p className="text-sm mt-2">{subMessage}</p>
+    </div>
+  );
+};
+
+export default EmptyState;