first commit

lib/widgets/co2_data_page.dart

@@ -0,0 +1,15 @@
+import 'package:flutter/material.dart';
+
+class Co2DataPage extends StatelessWidget {
+  const Co2DataPage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const Center(
+      child: Text(
+        '🍃 실시간 CO2 농도 변화 추이 분석',
+        style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold, color: Colors.white60),
+      ),
+    );
+  }
+}