按规划继续工作

结论：接入 LinuxCNC iniFindBool 到 INI WASM/SDK，并让 machine-session bridge 通过 vendored INI 解析 [EMCIO]RANDOM_TOOLCHANGER 后透传给 tooldata；native、WASM、OPFS 和浏览器 smoke 验证已通过。

wasm-port/runtime/opfs/linuxcnc-machine-session-bridge.js

@@ -17,6 +17,17 @@ function requireSessionSdk(interp) {
   }
 }
 
+function requireIniSdk(iniSdk) {
+  if (!iniSdk) {
+    return;
+  }
+  for (const method of ["writeTextFile", "getBool"]) {
+    if (typeof iniSdk[method] !== "function") {
+      throw new Error(`INI SDK is missing ${method}().`);
+    }
+  }
+}
+
 function resolveSessionPaths(machineId, options = {}) {
   return {
     iniOpfsPath: options.iniOpfsPath ?? machineIniPath(machineId, options.iniFilename),
@@ -30,11 +41,25 @@ function resolveSessionPaths(machineId, options = {}) {
   };
 }
 
+function randomToolChangerFromIni(iniSdk, iniWasmPath, iniText) {
+  if (!iniSdk) {
+    return false;
+  }
+
+  iniSdk.writeTextFile(iniWasmPath, iniText);
+  return iniSdk.getBool(iniWasmPath, "EMCIO", "RANDOM_TOOLCHANGER") === true;
+}
+
 export async function loadMachineSessionFromOpfs(interp, machineId, options = {}) {
   requireSessionSdk(interp);
+  requireIniSdk(options.iniSdk);
   const paths = resolveSessionPaths(machineId, options);
   const iniText = await loadTextFile(paths.iniOpfsPath, options.storage);
   interp.writeTextFile(paths.iniWasmPath, iniText);
+  const randomToolChanger =
+    typeof options.randomToolChanger === "boolean"
+      ? options.randomToolChanger
+      : randomToolChangerFromIni(options.iniSdk, paths.iniWasmPath, iniText);
 
   const parameters = await restoreMachineParametersFromOpfs(interp, machineId, {
     storage: options.storage,
@@ -45,7 +70,7 @@ export async function loadMachineSessionFromOpfs(interp, machineId, options = {}
     storage: options.storage,
     opfsPath: paths.toolTableOpfsPath,
     wasmPath: paths.toolTableWasmPath,
-    randomToolChanger: options.randomToolChanger === true,
+    randomToolChanger,
   });
 
   return {