diff --git a/AGENTS.md b/AGENTS.md
index 49d4d4db..a9502f67 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -241,6 +241,7 @@ Manual testing workflow:
 - Refactor `EnvelopeGenerator.Server/EnvelopeGenerator.Server/Components/Pages/EnvelopeSenderPage.razor` to reduce complexity.
 - Move sender dashboard business/status logic into dedicated services and extension methods (for example effective status resolution, tab classification, receiver signed/rejected detection, and grid-layout filter sanitation).
 - Keep `EnvelopeSenderPage.razor` focused on UI composition/state orchestration; avoid embedding heavy domain logic directly in the Razor component.
+- Apply a modular page architecture across Server pages (starting with `EnvelopeGenerator.Server/EnvelopeGenerator.Server/Components/Pages/EnvelopeSenderPage.razor`): split large pages into smaller subcomponents/partial modules, eliminate duplicated code paths, and centralize shared UI/domain logic for maintainability.
 
 ## Database
 
diff --git a/EnvelopeGenerator.Server/EnvelopeGenerator.Server/Components/Pages/ReceiverPage.razor b/EnvelopeGenerator.Server/EnvelopeGenerator.Server/Components/Pages/ReceiverPage.razor
index 04cae322..e6279a5f 100644
--- a/EnvelopeGenerator.Server/EnvelopeGenerator.Server/Components/Pages/ReceiverPage.razor
+++ b/EnvelopeGenerator.Server/EnvelopeGenerator.Server/Components/Pages/ReceiverPage.razor
@@ -404,6 +404,12 @@
     string? _shareMessage;
     bool _shareMessageIsError      = false;
 
+    // ----- Reject popup state -----
+    bool _rejectPopupVisible       = false;
+    bool _isRejectSubmitting       = false;
+    string _rejectReason           = string.Empty;
+    string? _rejectValidationMessage;
+
     async Task LogoutAsync()
     {
         if (_isLoggingOut || string.IsNullOrWhiteSpace(EnvelopeKey))
@@ -469,6 +475,29 @@
             return;
         }
 
+        _isSharing = true;
+        _shareMessage = null;
+        _shareMessageIsError = false;
+        await InvokeAsync(StateHasChanged);
+
+        try
+        {
+            _shareMessage = "Freigabe ist in dieser Ansicht derzeit nicht verfugbar.";
+            _shareMessageIsError = false;
+        }
+        catch (Exception ex)
+        {
+            Logger.LogError(ex, "Failed to share envelope {EnvelopeKey}", EnvelopeKey);
+            _shareMessage = "Freigabe fehlgeschlagen. Bitte versuchen Sie es erneut.";
+            _shareMessageIsError = true;
+        }
+        finally
+        {
+            _isSharing = false;
+            await InvokeAsync(StateHasChanged);
+        }
+    }
+
     // ----- Lifecycle -----
     protected override async Task OnInitializedAsync()
     {