switched to json storage to allow sharing

lib/screens/home_screen.dart

@@ -90,6 +90,53 @@ class _HomeScreenState extends State<HomeScreen> {
     );
   }
 
+  Future<void> _showStorageInfo() async {
+    final filePath = await _storageService.getProjectsFilePath();
+    if (!mounted) return;
+    
+    showDialog(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: const Row(
+          children: [
+            Icon(Icons.folder_open),
+            SizedBox(width: 8),
+            Text('Storage Location'),
+          ],
+        ),
+        content: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            const Text(
+              'Your projects are saved in:',
+              style: TextStyle(fontWeight: FontWeight.bold),
+            ),
+            const SizedBox(height: 8),
+            SelectableText(
+              filePath,
+              style: const TextStyle(
+                fontFamily: 'monospace',
+                fontSize: 12,
+              ),
+            ),
+            const SizedBox(height: 16),
+            const Text(
+              'You can share this file with other users or back it up for safekeeping.',
+              style: TextStyle(fontSize: 12),
+            ),
+          ],
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(context),
+            child: const Text('Close'),
+          ),
+        ],
+      ),
+    );
+  }
+
   void _showWebWarning() {
     showDialog(
       context: context,
@@ -137,6 +184,12 @@ class _HomeScreenState extends State<HomeScreen> {
                 tooltip: 'Web Platform Limitations',
               ),
             ),
+          if (!kIsWeb)
+            IconButton(
+              icon: const Icon(Icons.folder),
+              onPressed: _showStorageInfo,
+              tooltip: 'Storage Location',
+            ),
           IconButton(
             icon: const Icon(Icons.info_outline),
             onPressed: _showAboutDialog,