first commit

lib/widgets/tvoc_data_page.dart

@@ -0,0 +1,15 @@
+import 'package:flutter/material.dart';
+
+class TvocDataPage extends StatelessWidget {
+  const TvocDataPage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const Center(
+      child: Text(
+        '🧪 실시간 총휘발성유기화합물(TVOC) 측정값',
+        style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold, color: Colors.white60),
+      ),
+    );
+  }
+}