chore: checkpoint web Blender migration source, tools and docs

Accumulated uncommitted work: GHOST Web backend, WebGL/GPU web layer,
web workflow engine and protocol, tooling, docs and task records.
Large generated evidence, user-testing archives, build snapshots and
imported test assets remain untracked.

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

web/package.json

@@ -294,6 +294,9 @@
     "@ffmpeg/core": "^0.12.10",
     "@ffmpeg/ffmpeg": "^0.12.15",
     "@ffmpeg/util": "^0.12.2",
+    "fflate": "0.8.3",
+    "naga-wasm": "30.1.0",
+    "@webgpu/glslang": "0.0.15",
     "react": "19.2.8",
     "react-dom": "19.2.8"
   },