perf(movimento): vitrine e 3D mais leves, WebGL por software lembrado na sessão e suporte ao WebKit

app/components/showcase/ProjectLightbox.test.tsx

@@ -219,15 +219,18 @@ describe("ProjectLightbox", () => {
     );
   });
 
-  it("keeps 0:00 / 0:00 until the metadata is there, then reads the duration from the playback tick", () => {
+  it("shows –:– / –:– until the duration is there, then reads it from the playback tick", () => {
     const frames: FrameRequestCallback[] = [];
     jest.spyOn(window, "requestAnimationFrame").mockImplementation((cb) => {
       frames.push(cb);
       return frames.length;
     });
     const dialog = setup();
-    expect(dialog.querySelector(".ds-lb-time")?.textContent).toBe(
-      "0:00 / 0:00",
+    expect(dialog.querySelector(".ds-lb-time")?.textContent).toBe("–:– / –:–");
+    // o leitor de tela também não ouve "0:00 de 0:00"
+    expect(dialog.querySelector(".ds-lb-range")).toHaveAttribute(
+      "aria-valuetext",
+      "duração ainda não carregada",
     );
 
     const video = dialog.querySelector("video") as HTMLVideoElement;