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/tests/fixtures/modifier-stack-main-snapshots.py

@@ -0,0 +1,22 @@
+import bpy
+import json
+import pathlib
+import sys
+
+request = json.loads(pathlib.Path(sys.argv[sys.argv.index("--") + 1]).read_text())
+states = {}
+for label, file in request["files"].items():
+    bpy.ops.wm.open_mainfile(filepath=str(pathlib.Path(file).resolve()))
+    states[label] = {obj.name: [{
+        "name": modifier.name, "type": modifier.type,
+        "viewport": modifier.show_viewport, "render": modifier.show_render,
+        "values": {key: round(float(getattr(modifier, key)), 6) if isinstance(getattr(modifier, key), float)
+                   else list(getattr(modifier, key)) if not isinstance(getattr(modifier, key), (str, int, bool))
+                   else getattr(modifier, key)
+                   for key in ({"ARRAY": ["count", "use_relative_offset", "relative_offset_displace"],
+                                "BEVEL": ["width", "segments", "profile", "limit_method", "affect"],
+                                "SOLIDIFY": ["thickness", "offset"],
+                                "MIRROR": ["use_axis", "use_clip"],
+                                "SUBSURF": ["levels", "render_levels"]}.get(modifier.type, []))},
+    } for modifier in obj.modifiers] for obj in sorted(bpy.data.objects, key=lambda item: item.name)}
+pathlib.Path(request["output"]).write_text(json.dumps(states, indent=2) + "\n")