推进 INI 面板 machine file helper 文档

wasm-port/docs/compatibility-validation.md

@@ -70,6 +70,7 @@ UI helper docs:
 
 - `wasm-port/docs/ui-run-summary-helpers.md`
 - `wasm-port/docs/ui-session-summary-helpers.md`
+- `wasm-port/docs/ui-machine-file-helpers.md`
 
 The current browser smoke validation command is:
 

wasm-port/docs/ui-machine-file-helpers.md

@@ -0,0 +1,68 @@
+# UI Machine File Helpers
+
+## Purpose
+
+`runtime/ui/ini-panel/machine-file-summary.js` contains small host-boundary
+helpers for summarizing machine text file save/load actions. These helpers are
+pure so browser UI panels, SDK-facing wrappers, and Node smoke tests can share
+the same data shape without parsing log text.
+
+The helpers do not implement CNC behavior. They only describe OPFS path mapping
+and captured text lengths for machine files staged by the UI.
+
+## `createMachineFileSaveSummary(paths, gcodePath)`
+
+`paths` is the object returned by `saveMachineTextFiles(...)`.
+`gcodePath` is the OPFS path returned by `saveGcodeProgram(...)`.
+
+The returned summary has this shape:
+
+```js
+{
+  iniOpfsPath: "linuxcnc/machines/xyzab-tdr/machine.ini",
+  toolTableOpfsPath: "linuxcnc/machines/xyzab-tdr/tool.tbl",
+  parameterOpfsPath: "linuxcnc/machines/xyzab-tdr/linuxcnc.var",
+  gcodeOpfsPath: "linuxcnc/gcode/ui-session.ngc"
+}
+```
+
+## `createMachineFileLoadSummary(files)`
+
+`files` is the object returned by `loadMachineTextFiles(...)`.
+
+The returned summary has this shape:
+
+```js
+{
+  iniBytes: 26,
+  toolTableBytes: 13,
+  parameterBytes: 7
+}
+```
+
+## Log Helpers
+
+- `machineFileSaveLogLines(summary)` renders the staged OPFS paths.
+- `machineFileLoadLogLines(summary)` renders the loaded byte lengths.
+
+## Boundary Rules
+
+- Do not parse G-code text in these helpers.
+- Do not infer tool, parameter, kinematics, planner, or modal semantics.
+- Do not derive new CNC behavior from the staged file names or lengths.
+- Keep new fields limited to host/runtime boundary facts already produced by
+  the LinuxCNC-owned runtime or UI staging layer.
+
+## Validation
+
+Run the focused Node smoke after changing these helpers:
+
+```bash
+wasm-port/tests/ui/node/verify_ini_panel_machine_file_summary.sh
+```
+
+The aggregate UI Node smoke is:
+
+```bash
+wasm-port/tests/ui/node/verify_ui_node_smokes.sh
+```