按建议继续完成后续工作

结论：upstream rs274 side-by-side 基线已扩展到 program-end cleanup canonical 调用；standalone modal-state assertions 仍由 harness 覆盖，完整 native 验证已通过。

wasm-port/docs/drift-report.md

@@ -70,9 +70,10 @@ semantic rewrites:
   offsets, feed-control, comment/logging, numbered-parameter, spindle-orient,
   file-open reset, file-finish, tool-reload, and O-word subroutine fixtures;
   it also covers threading/rigid tap, NURBS dispatch boundaries, and comparable
-  canonical runtime edge calls. Adapter-heavy fixtures and upstream `rs274`
-  output gaps such as `WAIT` or hidden NURBS control-point detail still need
-  dedicated native LinuxCNC baselines.
+  canonical runtime edge and program-end cleanup calls. Adapter-heavy fixtures,
+  standalone modal-state assertions, and upstream `rs274` output gaps such as
+  `WAIT` or hidden NURBS control-point detail still need dedicated native
+  LinuxCNC baselines.
 
 ## Current Drift Conclusion