Implement queue-first curation workflow

src/RolemasterDb.App/Components/Curation/CurationQueueEmptyState.razor

@@ -0,0 +1,27 @@
+<div class="critical-editor-card curation-empty-state">
+    <div>
+        <h2 class="panel-title">@Title</h2>
+        <p class="muted">@Message</p>
+    </div>
+
+    @if (!string.IsNullOrWhiteSpace(ActionHref) && !string.IsNullOrWhiteSpace(ActionLabel))
+    {
+        <a class="btn btn-secondary" href="@ActionHref">@ActionLabel</a>
+    }
+</div>
+
+@code {
+
+    [Parameter]
+    public string Title { get; set; } = "Queue empty";
+
+    [Parameter]
+    public string Message { get; set; } = string.Empty;
+
+    [Parameter]
+    public string? ActionHref { get; set; }
+
+    [Parameter]
+    public string? ActionLabel { get; set; }
+
+}