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/protocol/storage.ts

@@ -297,6 +297,7 @@ export interface StorageRequest {
     | { type: "listAssets"; projectId: string }
     | { type: "getAssetCatalog" }
     | { type: "seedAssetCatalog"; projectId: string; manifest: unknown; library: ArrayBuffer; previews: Array<{ sha256: string; data: ArrayBuffer }>; seedId: string; repair?: boolean }
+    | { type: "mergeAssetCatalogManifest"; projectId: string; manifest: unknown }
     | { type: "readAssetCatalogPreview"; projectId: string; sha256: string }
     | { type: "commitAssetCatalogPreview"; projectId: string; expectedRevision: number; identity: unknown; data: ArrayBuffer }
     | { type: "commitTexturePaintTile"; commit: TexturePaintTileCommitIR }