feat(web): finish RE 5000PBR lesson video and fix non-ASCII GLB import

- Add 11:07 Chinese-narrated lesson video, VTT, poster and 13 chapter screenshots.
- Regenerate 20-render WebGL2 matrix and 15 operation captures on RTX 4060.
- Fix WASM staging for non-ASCII import filenames (猴头.glb); rebuild web_engine.
- Harden lesson video recording pipeline; fix stale lesson-link E2E selector.
- Add RE PBR derived libraries, lesson page, evidence and status report.

Co-Authored-By: Claude Code <noreply@anthropic.com>

web/playwright.config.ts

@@ -10,6 +10,24 @@ function resolveChromePath(): string | undefined {
 const chromePath = resolveChromePath();
 const testPort = Number.parseInt(process.env.WEB_TEST_PORT ?? "5173", 10) || 5173;
 const testOrigin = `http://127.0.0.1:${testPort}`;
+const gpuMode = process.env.GPU_MODE ?? (process.env.DISPLAY ? "hardware" : "swiftshader");
+const hardwareArgs = [
+  "--no-sandbox",
+  "--use-gl=angle",
+  "--use-angle=gl",
+  "--ignore-gpu-blocklist",
+  "--enable-gpu-rasterization",
+  "--enable-zero-copy",
+  "--enable-unsafe-webgpu",
+];
+const swiftshaderArgs = [
+  "--no-sandbox",
+  "--use-gl=swiftshader",
+  "--enable-unsafe-swiftshader",
+  "--enable-unsafe-webgpu",
+  "--enable-dawn-features=allow_unsafe_apis",
+  "--use-webgpu-adapter=swiftshader",
+];
 
 export default defineConfig({
   testDir: "tests/e2e",
@@ -21,10 +39,10 @@ export default defineConfig({
   use: {
     baseURL: testOrigin,
     ...devices["Desktop Chrome"],
-    headless: true,
+    headless: gpuMode !== "hardware",
     launchOptions: {
       ...(chromePath ? { executablePath: chromePath } : {}),
-      args: ["--no-sandbox", "--use-gl=swiftshader", "--enable-unsafe-swiftshader", "--enable-unsafe-webgpu", "--enable-dawn-features=allow_unsafe_apis", "--use-webgpu-adapter=swiftshader"],
+      args: gpuMode === "hardware" ? hardwareArgs : swiftshaderArgs,
     },
     screenshot: "only-on-failure",
     trace: "retain-on-failure",