按建议，继续完成后续工作

结论：已新增 INI WASM JS SDK 封装，把 UI 和 Node smoke test 改为通过 SDK 调用 vendored LinuxCNC inifile.cc 的导出 C ABI，并同步更新兼容性、复用和漂移文档。

wasm-port/runtime/sdk/package.json

@@ -0,0 +1,4 @@
+{
+  "private": true,
+  "type": "module"
+}

wasm-port/runtime/sdk/src/linuxcnc-ini.js

@@ -0,0 +1,67 @@
+import createLinuxCncIniModule from "../../ui/ini-panel/linuxcnc_ini.js";
+
+function allocCString(mod, value) {
+  const bytes = mod.lengthBytesUTF8(value) + 1;
+  const ptr = mod._malloc(bytes);
+  mod.stringToUTF8(value, ptr, bytes);
+  return ptr;
+}
+
+function ensureParentPath(mod, path) {
+  const parts = path.split("/").filter(Boolean);
+  let current = "";
+  for (const part of parts.slice(0, -1)) {
+    current += `/${part}`;
+    try {
+      mod.FS.mkdir(current);
+    } catch {
+      // Directory already exists.
+    }
+  }
+}
+
+export async function createLinuxCncIniSdk(moduleOptions = {}) {
+  const mod = await createLinuxCncIniModule(moduleOptions);
+
+  return {
+    module: mod,
+
+    writeTextFile(path, text) {
+      ensureParentPath(mod, path);
+      mod.FS.writeFile(path, text, { encoding: "utf8" });
+    },
+
+    getString(path, section, tag) {
+      const pathPtr = allocCString(mod, path);
+      const sectionPtr = allocCString(mod, section);
+      const tagPtr = allocCString(mod, tag);
+      const outSize = 2048;
+      const outPtr = mod._malloc(outSize);
+
+      try {
+        const rc = mod._lcini_get_string(
+          pathPtr,
+          sectionPtr,
+          tagPtr,
+          outPtr,
+          outSize,
+        );
+        return rc === 0 ? mod.UTF8ToString(outPtr) : null;
+      } finally {
+        mod._free(pathPtr);
+        mod._free(sectionPtr);
+        mod._free(tagPtr);
+        mod._free(outPtr);
+      }
+    },
+
+    getFields(path, fields) {
+      return Object.fromEntries(
+        Object.entries(fields).map(([name, query]) => [
+          name,
+          this.getString(path, query.section, query.tag),
+        ]),
+      );
+    },
+  };
+}