chore: checkpoint web Blender feature-gap work, docs and tests

- update native web_engine sources and rebuilt wasm artifacts
- add task cards, status notes and tooling scripts
- add web e2e specs, tutorial UI sources and tutorial assets
- sync golden task manifests and audit records

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

web/tests/fixtures/wbv2-operator-sweep/uv.json

@@ -0,0 +1,57 @@
+[
+ "uv.align",
+ "uv.align_rotation",
+ "uv.arrange_islands",
+ "uv.average_islands_scale",
+ "uv.copy",
+ "uv.copy_mirrored_faces",
+ "uv.cube_project",
+ "uv.cursor_set",
+ "uv.custom_region_set",
+ "uv.cylinder_project",
+ "uv.export_layout",
+ "uv.follow_active_quads",
+ "uv.hide",
+ "uv.lightmap_pack",
+ "uv.mark_seam",
+ "uv.minimize_stretch",
+ "uv.move_on_axis",
+ "uv.pack_islands",
+ "uv.paste",
+ "uv.pin",
+ "uv.project_from_view",
+ "uv.randomize_uv_transform",
+ "uv.remove_doubles",
+ "uv.reset",
+ "uv.reveal",
+ "uv.rip",
+ "uv.rip_move",
+ "uv.seams_from_islands",
+ "uv.select",
+ "uv.select_all",
+ "uv.select_box",
+ "uv.select_by_winding",
+ "uv.select_circle",
+ "uv.select_edge_ring",
+ "uv.select_lasso",
+ "uv.select_less",
+ "uv.select_linked",
+ "uv.select_linked_pick",
+ "uv.select_loop",
+ "uv.select_mode",
+ "uv.select_more",
+ "uv.select_overlap",
+ "uv.select_pinned",
+ "uv.select_similar",
+ "uv.select_split",
+ "uv.select_tile",
+ "uv.shortest_path_pick",
+ "uv.shortest_path_select",
+ "uv.smart_project",
+ "uv.snap_cursor",
+ "uv.snap_selected",
+ "uv.sphere_project",
+ "uv.stitch",
+ "uv.unwrap",
+ "uv.weld"
+]