Per-function transplant of historical and worktree donor bodies into the
current tree (whole-blob mining had rejected them for unrelated losses).
Each landing is the minimum hunk, strict exact in its whole-TU gate with
zero inherited losses, and reviewed for house rules and hard holds:
- helper spellings replace hand-expanded math (_device_frontfacing,
_point_in_triangle3d, _actor_look_valid_aim/look_vector)
- _pill_test_vector3d normalizes directly into the output normal
- natural control-flow/declaration forms reopen five parks
(_structure_cluster_mark/unmarked, __rasterizer_widget_draw_sprite2d,
_rasterizer_set_model_skinning, _ai_handle_editing)
- two byte-proven non-UB original bugs kept under the documented
original-bug policy with BUG comments (_ai_handle_editing unscaled
csmemmove counts, _ai_scripting_follow_target_ai repeated name)
Stable diff vs 9062b1e96: +11 functions, 0 regressions; parks 268 -> 263.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
