按建议，继续完成后续工作

结论：已将 INI 面板的 OPFS 文本文件读写抽为 host-side file-service，并新增 Node mock 验证，确认 OPFS 边界不进入 WASM core 且可覆盖保存、读取、缺失路径和非法路径行为。

wasm-port/docs/drift-report.md

@@ -42,7 +42,7 @@ semantic rewrites:
 | Kinematics component lifecycle | Kinematics modules are initialized through LinuxCNC module entry points where native runtime probes exist, while HAL component init/ready/exit, HAL pin allocation, and RTAPI module metadata are handled by standalone shims. |
 | Go math C/C++ linkage | `genserkins` runtime probing compiles vendored `gomath.c` through a narrow C++ wrapper so LinuxCNC `genserfuncs.c` can link to the upstream Go math symbols without editing vendored source. |
 | Switchkins iterative forward | `genhexkins` runtime probing follows LinuxCNC switchkins iterative-forward behavior, including the first-call warmup path before asserting roundtrip convergence. |
-| Browser storage | OPFS remains outside the native core and is not yet connected. |
+| Browser storage | OPFS remains outside the native core; `runtime/opfs/file-service.js` owns browser text-file persistence for host-managed INI content. |
 
 ## Enforced Non-Drift Rules
 
@@ -59,7 +59,8 @@ semantic rewrites:
 - No browser/full-core WASM parity tests yet. The INI parser now has a Node
   WASM smoke harness against vendored LinuxCNC `inifile.cc`.
 - No JS SDK validation yet.
-- No OPFS persistence validation yet.
+- OPFS validation is currently limited to a Node mock of the browser
+  file-service adapter; browser-level OPFS validation is not yet established.
 - Identity/trivial, `5axiskins`, TRT `xyzac`/`xyzbc`, delta, SCARA, PUMA,
   serial, hexapod, pentapod, and related kinematics sources now have native
   source-probe coverage.