Implemented new C++ logic

Client/streamhub/StatsPanel.h

@@ -0,0 +1,16 @@
+/**
+ * @file StatsPanel.h
+ * @brief Per-source statistics table panel.
+ */
+
+#pragma once
+
+namespace StreamHubClient {
+class App;
+
+/**
+ * @brief Render the statistics table (call inside an ImGui::Begin/End window).
+ */
+void RenderStatsPanel(App& app);
+
+} /* namespace StreamHubClient */