pull refresh on session screen

lib/ui/session/session_screen.dart

@@ -267,6 +267,33 @@ class _SessionScreenState extends State<SessionScreen> {
     }
   }
 
+  Future<void> _handleRefresh() async {
+    if (widget.sessionService == null) return;
+
+    try {
+      await widget.sessionService!.refreshNostrProfile();
+      if (mounted) {
+        setState(() {});
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(
+            content: Text('Session data refreshed'),
+            duration: Duration(seconds: 2),
+          ),
+        );
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            content: Text('Failed to refresh: ${e.toString().replaceAll('SessionException: ', '')}'),
+            backgroundColor: Colors.red,
+            duration: const Duration(seconds: 3),
+          ),
+        );
+      }
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     final isLoggedIn = widget.sessionService?.isLoggedIn ?? false;
@@ -278,11 +305,20 @@ class _SessionScreenState extends State<SessionScreen> {
       ),
       body: _isLoading
           ? const Center(child: CircularProgressIndicator())
-          : SingleChildScrollView(
-              padding: const EdgeInsets.all(16),
-              child: Column(
-                crossAxisAlignment: CrossAxisAlignment.stretch,
-                children: [
+          : _buildRefreshableContent(isLoggedIn, currentUser),
+    );
+  }
+
+  Widget _buildRefreshableContent(bool isLoggedIn, currentUser) {
+    final canRefresh = isLoggedIn && 
+                       (currentUser?.nostrProfile != null || currentUser?.nostrPrivateKey != null);
+    
+    final content = SingleChildScrollView(
+      physics: const AlwaysScrollableScrollPhysics(),
+      padding: const EdgeInsets.all(16),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.stretch,
+        children: [
                   if (isLoggedIn && currentUser != null) ...[
                     Card(
                       child: Padding(
@@ -613,9 +649,17 @@ class _SessionScreenState extends State<SessionScreen> {
                     ),
                   ],
                 ],
-              ),
-            ),
-    );
+        ),
+      );
+
+    if (canRefresh) {
+      return RefreshIndicator(
+        onRefresh: _handleRefresh,
+        child: content,
+      );
+    } else {
+      return content;
+    }
   }
 }