按建议，继续完成后续工作

结论：将解释器外部长度单位读取接入共享 emcStatus 状态边界，并补充 inch/mm 初始化验证。

wasm-port/docs/compatibility-validation.md

@@ -52,11 +52,11 @@ The validation fails if:
 | --- | --- |
 | `linuxcnc_ini_probe` | Validates vendored LinuxCNC INI parsing can be used standalone. |
 | `linuxcnc_interp_state_probe` | Validates interpreter state constants and structs compile under the standalone boundary. |
-| `linuxcnc_emc_status_probe` | Validates the standalone `emcStatus` machine-units status boundary used by vendored interpreter conversion code. |
+| `linuxcnc_emc_status_probe` | Validates the standalone `emcStatus` machine-units status boundary used by vendored interpreter conversion and initialization code. |
 | `linuxcnc_namedparam_harness` | Validates LinuxCNC named parameter behavior, `_ini[...]`, and `_hal[...]` adapter resolution. |
 | `linuxcnc_interp_minimal_harness` | Runs G-code fixtures through vendored LinuxCNC parser/execution/conversion code and captures canonical events. |
 | `linuxcnc_parameter_file_harness` | Validates LinuxCNC parameter file restore/save behavior and required/read-only parameter handling. |
-| `linuxcnc_interp_init_harness` | Validates vendored LinuxCNC `Interp::init()` emits canonical initialization boundaries through the standalone event sink. |
+| `linuxcnc_interp_init_harness` | Validates vendored LinuxCNC `Interp::init()` emits canonical initialization boundaries and reads metric/inch machine units through the standalone event/status boundary. |
 | `linuxcnc_indexer_harness` | Validates vendored LinuxCNC single-axis rotary indexer dispatch emits lock/unlock and motion boundaries through the standalone event sink. |
 | `linuxcnc_tp_api_probe` | Validates vendored LinuxCNC trajectory planner calls for linear, arc, and queued motion paths. |
 | `linuxcnc_kinematics_probe` | Validates vendored LinuxCNC `trivkins.c` plus `kins_util.c` initialize and perform identity forward/inverse mapping through the standalone HAL/RTAPI boundary. |

wasm-port/docs/drift-report.md

@@ -33,7 +33,7 @@ semantic rewrites:
 | Interpreter reset | LinuxCNC `ON_RESET` is captured as a canonical test event on the vendored interpreter reset/file-open path. |
 | Interpreter init | LinuxCNC `INIT_CANON` and the canonical initialization sequence from vendored `Interp::init()` are captured as test events. |
 | Comment logging | LinuxCNC `LOGOPEN`, `LOG`, `LOGAPPEND`, and `LOGCLOSE` callbacks are captured as canonical test events instead of writing host log files. |
-| EMC status machine units | A narrow standalone `emcStatus` shim exposes the machine-units field used by vendored interpreter conversion code; `linuxcnc_emc_status_probe` guards the inch/mm boundary. |
+| EMC status machine units | A narrow standalone `emcStatus` shim exposes the machine-units field used by vendored interpreter conversion and initialization code; `linuxcnc_emc_status_probe` and `linuxcnc_interp_init_harness` guard the inch/mm boundary. |
 | Python/remap | Python/remap hooks are stubbed at the runtime edge. |
 | Dynamic interpreter path | `interp_base.cc` probe uses standalone `EMC2_HOME` compile-time path boundary. |
 | Realtime scheduler | TP probes seed deterministic status/config data instead of running LinuxCNC realtime process topology. |

wasm-port/docs/source-reuse-map.md

@@ -33,7 +33,7 @@ Current validation is intentionally mechanical:
 | --- | --- | --- | --- | --- |
 | INI parsing | `src/emc/ini/inifile.cc`, `inifile.h`, `inifile.hh` | Copy unchanged | Native file IO remains LinuxCNC-style in the vendored parser; browser OPFS integration remains outside this layer | Vendor byte sync, `linuxcnc_ini_probe`, `linuxcnc_inifile_source_probe` |
 | RTAPI compatibility headers | `src/rtapi/rtapi_*.h` in the manifest | Copy unchanged plus standalone shim include path | `runtime/core/shims/rtapi.h` supplies the minimal standalone RTAPI surface needed by vendored code | Vendor byte sync, compile coverage through dependent source probes |
-| Canon/NML-facing interpreter types | `src/emc/nml_intf/canon*.hh`, `emctool.h`, `interp_return.hh`, `motion_types.h`, `emcpose.*`, `emcpos.h`, `debugflags.h`, `src/emc/linuxcnc.h` | Copy unchanged plus narrow standalone status shim | NML transport is not ported; `runtime/core/shims/nml_intf/emc.hh` exposes only the `emcStatus` machine-units status edge currently needed by vendored interpreter conversion code | Vendor byte sync, dependent source probes, `linuxcnc_emc_status_probe`, `linuxcnc_tp_api_probe`, interpreter harnesses |
+| Canon/NML-facing interpreter types | `src/emc/nml_intf/canon*.hh`, `emctool.h`, `interp_return.hh`, `motion_types.h`, `emcpose.*`, `emcpos.h`, `debugflags.h`, `src/emc/linuxcnc.h` | Copy unchanged plus narrow standalone status shim | NML transport is not ported; `runtime/core/shims/nml_intf/emc.hh` exposes only the `emcStatus` machine-units status edge currently needed by vendored interpreter conversion and initialization code | Vendor byte sync, dependent source probes, `linuxcnc_emc_status_probe`, `linuxcnc_tp_api_probe`, interpreter harnesses |
 | Motion state headers | `src/emc/motion/state_tag.h`, `emcmotcfg.h`, `simple_tp.h`, `motion.h`, `mot_priv.h`, `axis.h` | Copy unchanged | Realtime motion process is not ported; standalone probes seed the small motion status/config state required by TP calls | Vendor byte sync, `linuxcnc_tp_api_probe` |
 | Identity/trivial kinematics | `src/emc/kinematics/kinematics.h`, `cubic.h`, `kins_util.c`, `trivkins.c` | Copy unchanged | HAL component lifecycle and RTAPI module metadata are replaced by standalone shims; forward/inverse mapping behavior remains LinuxCNC source | Vendor byte sync, per-file source probes, `linuxcnc_kinematics_probe` |
 | Switchable 5-axis bridge kinematics | `src/emc/kinematics/5axiskins.c`, `switchkins.c`, `switchkins.h`, `userkfuncs.c`, plus `src/rtapi/rtapi_ctype.h` | Copy unchanged | HAL pin allocation, HAL component lifecycle, and RTAPI module metadata are standalone runtime edges; switchable 5-axis forward/inverse behavior remains LinuxCNC source | Vendor byte sync, per-file source probes, `linuxcnc_5axis_kinematics_probe` |