按建议，继续完成后续工作

结论：已新增 OPFS host-side 路径模型，覆盖 INI、tool table、parameter、G-code、preview cache 与 session snapshot 存储目标，并让 file-service 和浏览器 smoke 复用该模型；聚合 smoke 验证通过。

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

@@ -5,6 +5,16 @@ import {
   loadTextFile,
   saveTextFile,
 } from "../../../runtime/opfs/file-service.js";
+import {
+  defaultMachinePaths,
+  gcodeProgramPath,
+  machineIniPath,
+  normalizeOpfsPath,
+  parameterFilePath,
+  previewCachePath,
+  sessionSnapshotPath,
+  toolTablePath,
+} from "../../../runtime/opfs/path-model.js";
 
 class MockFileHandle {
   constructor(name) {
@@ -63,6 +73,19 @@ const storage = {
 
 assert.equal(await getOpfsRoot(storage), root);
 
+assert.equal(normalizeOpfsPath("linuxcnc/machines/xyzab.ini"), "linuxcnc/machines/xyzab.ini");
+assert.equal(machineIniPath("xyzab-tdr"), "linuxcnc/machines/xyzab-tdr/machine.ini");
+assert.equal(toolTablePath("xyzab-tdr"), "linuxcnc/machines/xyzab-tdr/tool.tbl");
+assert.equal(parameterFilePath("xyzab-tdr"), "linuxcnc/machines/xyzab-tdr/linuxcnc.var");
+assert.equal(gcodeProgramPath("fixture.ngc"), "linuxcnc/gcode/fixture.ngc");
+assert.equal(previewCachePath("fixture"), "linuxcnc/preview-cache/fixture/preview.json");
+assert.equal(sessionSnapshotPath("session-1"), "linuxcnc/sessions/session-1/snapshot.json");
+assert.deepEqual(defaultMachinePaths("xyzab-tdr"), {
+  ini: "linuxcnc/machines/xyzab-tdr/machine.ini",
+  toolTable: "linuxcnc/machines/xyzab-tdr/tool.tbl",
+  parameters: "linuxcnc/machines/xyzab-tdr/linuxcnc.var",
+});
+
 await saveTextFile(
   "linuxcnc/machines/xyzab.ini",
   "[EMC]\nMACHINE = opfs-smoke\n",
@@ -81,6 +104,10 @@ await assert.rejects(
   () => saveTextFile("../escape.ini", "", storage),
   /Invalid OPFS path/,
 );
+assert.throws(
+  () => machineIniPath("../escape"),
+  /Invalid machine id/,
+);
 await assert.rejects(
   () => getOpfsRoot({}),
   /OPFS is not available/,