按规划继续工作

结论：扩展 tool_semantics 期望，固定 T/M6/G43/G49/M61 后 vendored LinuxCNC 的位置参数与 post-execute modal、override、spindle、mist、flood 状态读回，并同步验证文档。

wasm-port/docs/drift-report.md

@@ -98,8 +98,9 @@ semantic rewrites:
   fixtures; it also covers threading/rigid tap, NURBS dispatch boundaries, and
   comparable canonical runtime edge and program-end cleanup calls. The
   vendored-source native harness plus Node WASM and browser smokes also pin
-  the `position_params` MDI/file-path and `canon_runtime_edges` post-program
-  modal, override, spindle, mist, and flood `_setup` state. It now also checks the negative fixture set
+  the `position_params` MDI/file-path, `tool_semantics`, and
+  `canon_runtime_edges` post-program modal, override, spindle, mist, and flood
+  `_setup` state. It now also checks the negative fixture set
   against upstream `rs274 -g` for expected error text and absent canonical
   event constraints.
   HAL-backed adapter-heavy fixtures, standalone modal-state assertions, and upstream