update: add text and button to bottom sheet

app/lib/widgets/main_layout.dart

@@ -171,15 +171,30 @@ class _MapContainerWidgetState extends State<MapContainerWidget> {
                             context: context,
                             builder: (BuildContext context) {
                               return SizedBox(
-                                height: 400,
+                                height: 200,
+                                width: screenWidth,
                                 child: Center(
-                                  child: ElevatedButton(
-                                      child: const Text('Close'),
-                                      onPressed: () {
-                                        Navigator.pop(context);
-                                        },
+                                    child: Column(
+                                      mainAxisAlignment: MainAxisAlignment.center,
+                                      children: [
+                                        Text(
+                                            "Export ice data for $selectedLake",
+                                            style: const TextStyle(fontSize: 20),
+                                        ),
+                                        const SizedBox(height: contPadding),
+                                        ElevatedButton(
+                                          style: ButtonStyle(
+                                            backgroundColor: MaterialStateProperty.all<Color>(Colors.white24),
+                                          ),
+                                          child: const Text("Export JSON"),
+                                          onPressed: () {
+                                            Navigator.pop(context);
+                                          },
+                                        )
+                                        // Add more children here as needed
+                                      ],
                                     ),
-                                  ),
+                                ),
                               );
                             },
                         );