rewrite

implementations/main.cpp

@@ -22,27 +22,32 @@ int main() {
     // surface to the canvas (full viewport, or the mount element).
     static Window window(1280, 720, "Catcrafts");
 
+    // document.title is only reachable through Window::SetTitle, so give the
+    // router a way to set a per-route title without threading a Window
+    // through every render call.
+    SetActiveWindow(&window);
+
     // Build the ray-tracing pipeline + scene now (runs StartInit/FinishInit).
-    // The render canvas starts hidden; the demo only traces once a route
+    // The render canvas starts hidden; it only traces once the /demo route
     // mounts it into #webgpu-demo (see Catcrafts:Demo).
     SetupDemo(window);
 
     InitializePage();
 
-    Router::AddPopStateListener([]{
-        RenderRoot(Router::GetPath());
-    });
+    // Back/forward. The Router V1 callback carries no payload, so the route is
+    // re-read from window.location — which is the right thing regardless,
+    // since the location is the single source of truth for what should be on
+    // screen.
+    Router::AddPopStateListener([]{ RenderCurrentRoute(); });
 
-    static Dom::HtmlElementPtr blogButton("blog-nav-button");
-    blogButton.AddClickListener([](Dom::MouseEvent) {
-        Router::PushState("{}", "", "/blog");
-        RenderRoot("/blog");
-    });
-
-    RenderRoot(Router::GetPath());
+    RenderCurrentRoute();
 
     window.Render();
     window.StartUpdate();
+    // StartSync rather than StayAlive: /demo drives the ray tracer from the
+    // animation-frame loop, so the loop has to exist before that route is
+    // visited. A build of this site without the demo could call StayAlive
+    // instead and skip the permanent rAF tick entirely.
     window.StartSync();
     return 0;
 }