Correction du demarrage apres la modal d'authentification

ChessCubing.App/Components/SiteMenu.razor

@@ -140,26 +140,15 @@
         => user.FindFirst("email")?.Value
             ?? "Session active";
 
-    protected override async Task OnAfterRenderAsync(bool firstRender)
-    {
-        if (!firstRender)
-        {
-            return;
-        }
-
-        _dotNetReference = DotNetObjectReference.Create(this);
-        await JS.InvokeVoidAsync("chesscubingAuthModal.registerListener", _dotNetReference);
-        _listenerRegistered = true;
-    }
-
-    private void OpenLoginModal()
-        => OpenAuthModal("Se connecter", LoginHref);
-
-    private void OpenRegisterModal()
-        => OpenAuthModal("Creer un compte", RegisterHref);
-
-    private void OpenAuthModal(string title, string source)
+    private async Task OpenLoginModal()
+        => await OpenAuthModalAsync("Se connecter", LoginHref);
+
+    private async Task OpenRegisterModal()
+        => await OpenAuthModalAsync("Creer un compte", RegisterHref);
+
+    private async Task OpenAuthModalAsync(string title, string source)
     {
+        await EnsureAuthListenerAsync();
         AuthModalTitle = title;
         AuthModalSource = source;
         ShowAuthModal = true;
@@ -171,6 +160,27 @@
         AuthModalSource = null;
     }
 
+    private async Task EnsureAuthListenerAsync()
+    {
+        if (_listenerRegistered)
+        {
+            return;
+        }
+
+        _dotNetReference ??= DotNetObjectReference.Create(this);
+
+        try
+        {
+            await JS.InvokeVoidAsync("chesscubingAuthModal.registerListener", _dotNetReference);
+            _listenerRegistered = true;
+        }
+        catch
+        {
+            // Si le navigateur garde encore un ancien script en cache,
+            // on laisse l'application fonctionner et la modal reste utilisable sans auto-fermeture.
+        }
+    }
+
     [JSInvokable]
     public Task HandleAuthModalMessage(string status)
     {