Switch all text to medium

lib/app.dart

@@ -207,11 +207,18 @@ TextTheme _buildTextTheme(Color textColor) {
       fontFamily: 'Inter',
       color: textColor,
       fontSize: 16,
-      fontWeight: FontWeight.w400,
+      fontWeight: FontWeight.w500,
+    ),
+    bodyText2: TextStyle(
+      fontFamily: 'Inter',
+      color: textColor,
+      fontSize: 14,
+      fontWeight: FontWeight.w500,
     ),
     caption: TextStyle(
       color: textColor.withOpacity(0.6),
       fontSize: 14,
+      fontWeight: FontWeight.w500,
     ),
     overline: TextStyle(
       color: textColor.withOpacity(0.8),