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>

blender-5.2.0/source/blender/blenkernel/intern/modifier.cc

@@ -54,6 +54,9 @@
 #include "BKE_geometry_set.hh"
 #include "BKE_global.hh"
 #include "BKE_idprop.hh"
+#ifdef WITH_WEB
+#  include "RNA_access_guard.hh"
+#endif
 #include "BKE_idtype.hh"
 #include "BKE_key.hh"
 #include "BKE_lib_id.hh"
@@ -185,6 +188,9 @@ static void modifier_free_data_id_us_cb(void * /*user_data*/,
 
 void BKE_modifier_free_ex(ModifierData *md, const int flag)
 {
+#ifdef WITH_WEB
+  RNAPropertyAccessScope::invalidate_storage(md);
+#endif
   const ModifierTypeInfo *mti = BKE_modifier_get_info(md->type);
 
   if ((flag & LIB_ID_CREATE_NO_USER_REFCOUNT) == 0) {