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>

tests/golden/RE-PBR-LIMITS-001/gpu/batch0-gpu-enable.json

@@ -0,0 +1,84 @@
+{
+  "schemaVersion": 1,
+  "task": "RE-PBR-LIMITS-001",
+  "batch": "0-gpu-enable",
+  "status": "PASS",
+  "generatedAt": "2026-11-12T00:58:45.890906+00:00",
+  "browser": {
+    "executable": "/usr/bin/google-chrome",
+    "headed": true,
+    "display": ":1"
+  },
+  "launch": {
+    "gpuMode": "hardware",
+    "args": [
+      "--no-sandbox",
+      "--use-gl=angle",
+      "--use-angle=gl",
+      "--ignore-gpu-blocklist",
+      "--enable-gpu-rasterization",
+      "--enable-zero-copy",
+      "--enable-unsafe-webgpu"
+    ]
+  },
+  "webgl": {
+    "vendor": "Google Inc. (NVIDIA Corporation)",
+    "renderer": "ANGLE (NVIDIA Corporation, NVIDIA GeForce RTX 4060 Laptop GPU/PCIe/SSE2, OpenGL 4.5.0)",
+    "version": "WebGL 2.0 (OpenGL ES 3.0 Chromium)"
+  },
+  "webgpu": {
+    "adapter": "present",
+    "info": {}
+  },
+  "e2e": {
+    "spec": "web/tests/e2e/re-pbr-render-workflow.spec.ts",
+    "grep": "assign six materials",
+    "result": "1 passed",
+    "durationSeconds": 27.0,
+    "swiftshaderReferenceDurationSeconds": 35.8
+  },
+  "render": {
+    "material": "black_worn_wall_brick",
+    "resolution": 1024,
+    "camera": "SCENE",
+    "hardware": {
+      "path": "tests/golden/RE-PBR-LIMITS-001/gpu/hardware-black_worn_wall_brick-1024.png",
+      "sha256": "62d9aaf2b598f7622029a66c483cdcd6388bb47e4d2b4bb43476739742a1ce67",
+      "bytes": 412605
+    },
+    "swiftshader": {
+      "path": "tests/golden/RE-PBR-RENDER-001/renders/material-black_worn_wall_brick-1024-scene.png",
+      "sha256": "16f7d4ef3ae678c7d787c1da470d0bc7363e0ed160b7f7e42d4b3a21361ce0b5",
+      "bytes": 399540
+    },
+    "meanStd": {
+      "hardware": {
+        "mean": 95.277,
+        "std": 44.758
+      },
+      "swiftshader": {
+        "mean": 95.332,
+        "std": 44.724
+      }
+    },
+    "note": "Renderer confirms NVIDIA RTX 4060 via ANGLE; SHA differs only by raster timing, mean/std within 0.06."
+  },
+  "notes": [
+    "Playwright config now selects hardware when GPU_MODE=hardware or DISPLAY is present; SwiftShader is explicit fallback.",
+    "Capture scripts accept --gpu hardware|swiftshader and probe WEBGL_debug_renderer_info before capture; hardware lane fails closed on SwiftShader/llvmpipe."
+  ],
+  "hardwareCapture": {
+    "status": "PASS",
+    "renders": 20,
+    "steps": 15,
+    "uniqueSha": 20,
+    "report": "tests/golden/RE-PBR-RENDER-001/report.json",
+    "reportSha256": "40c5a758df05c566d24c9973862c6bb6fa01e74dc6bbc772f4fe5a9623be4481",
+    "webgl": {
+      "vendor": "Google Inc. (NVIDIA Corporation)",
+      "renderer": "ANGLE (NVIDIA Corporation, NVIDIA GeForce RTX 4060 Laptop GPU/PCIe/SSE2, OpenGL 4.5.0)",
+      "version": "WebGL 2.0 (OpenGL ES 3.0 Chromium)"
+    },
+    "note": "20/20 unique; SCENE vs VIEWPORT now differ because the capture waits for the new result src / idle button. ready:0:0 on reopen remains for Phase C."
+  }
+}