继续完成 web-rtcp-5axis-sim-plan

结论：完成 LinuxCNC kinematics WASM ABI 覆盖，并将 web-rtcp-5axis-sim-plan 的 RTCP frame/boundary adapter 接到 xyzac-trt kinematics SDK；Node、build、browser smoke 验证通过。

wasm-port/docs/porting-steps-standalone.md

@@ -830,6 +830,18 @@ Current five-axis switchkins status:
    subroutines, then call vendored `Interp::parse_remap()`, `open()`,
    `read()`, and `execute()`; standalone code only supplies the INI/file path
    boundary.
+10. Independent kinematics WASM modules now cover the vendored LinuxCNC
+    kinematics set: `trivkins`, `5axiskins`, `xyzac-trt`, `xyzbc-trt`,
+    `corexy`, `rotate`, `rose`, `max`, `lineardelta`, `rotarydelta`,
+    `scorbot`, `tripod`, `scara`, `puma`, `genser`, `genhex`, and
+    `pentakins`. The modules compile vendored LinuxCNC
+    `src/emc/kinematics` sources plus required vendored posemath/gomath
+    sources, expose a small `lckins_*` C ABI for `type`, `switchable`,
+    `switch`, `forward`, `inverse`, and `run_probe`, and are wrapped by
+    `createLinuxCncKinematicsSdk()`. The ABI preserves LinuxCNC's in/out
+    buffer behavior for iterative algorithms: callers may seed inverse joint
+    buffers and forward pose buffers, while all kinematics math remains in
+    vendored LinuxCNC source.
 
 Next work: