Advance M16 modifier parity and context governance

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

@@ -5711,6 +5711,12 @@ void BKE_particle_system_blend_read_after_liblink(BlendLibReader * /*reader*/,
       }
     }
     else {
+#ifdef WITH_WEB
+      /* Keep unlinked legacy particle systems in the Web Main as metadata-only entries. The
+       * desktop cleanup path assumes a fully linked ParticleSettings pointer and would free a
+       * stale modifier allocation in the narrow Web registry. */
+      continue;
+#else
       /* Particle modifier must be removed before particle system. */
       ParticleSystemModifierData *psmd = psys_get_modifier(ob, &psys);
       BKE_modifier_remove_from_list(ob, reinterpret_cast<ModifierData *>(psmd));
@@ -5718,6 +5724,7 @@ void BKE_particle_system_blend_read_after_liblink(BlendLibReader * /*reader*/,
 
       BLI_remlink(particles, &psys);
       MEM_delete(&psys);
+#endif
     }
   }
 }