推进 OPFS 会话快照清单能力

wasm-port/tests/opfs/node/verify_file_service.mjs

@@ -16,6 +16,7 @@ import {
   toolTablePath,
 } from "../../../runtime/opfs/path-model.js";
 import {
+  createMachineSessionSnapshotPayload,
   createSessionSnapshot,
   loadSessionSnapshot,
   saveSessionSnapshot,
@@ -216,12 +217,38 @@ assertSessionSnapshotStoragePath(
 assertMachineFileStoragePaths("xyzab-tdr", defaultMachinePaths("xyzab-tdr"));
 assertMachineFileStoragePaths("xyzab-tdr", machineFilePaths("xyzab-tdr"));
 
-const snapshotPayload = {
+const snapshotPayload = createMachineSessionSnapshotPayload("xyzab-tdr", {
+  gcodeFilename: "fixture.ngc",
+});
+assert.deepEqual(snapshotPayload, {
+  machineId: "xyzab-tdr",
   files: {
     ini: machineIniPath("xyzab-tdr"),
+    parameters: parameterFilePath("xyzab-tdr"),
     toolTable: toolTablePath("xyzab-tdr"),
+    gcode: gcodeProgramPath("fixture.ngc"),
   },
-};
+});
+assert.deepEqual(
+  createMachineSessionSnapshotPayload("custom-machine", {
+    parameterFilename: "custom.var",
+    toolTableFilename: "custom-tool.tbl",
+    gcodeOpfsPath: "linuxcnc/gcode/custom-fixture.ngc",
+  }),
+  {
+    machineId: "custom-machine",
+    files: {
+      ini: "linuxcnc/machines/custom-machine/machine.ini",
+      parameters: "linuxcnc/machines/custom-machine/custom.var",
+      toolTable: "linuxcnc/machines/custom-machine/custom-tool.tbl",
+      gcode: "linuxcnc/gcode/custom-fixture.ngc",
+    },
+  },
+);
+assert.throws(
+  () => createMachineSessionSnapshotPayload("bad-machine", { gcodeFilename: "../escape.ngc" }),
+  /Invalid G-code filename/,
+);
 const snapshot = createSessionSnapshot("session-1", snapshotPayload, {
   createdAt: "2026-06-08T00:00:00.000Z",
   metadata: { source: "node-smoke" },