按建议，继续完成后续工作

结论：已新增 OPFS machine file store，支持 INI、tool table、parameter file 和 G-code 的纯文本保存/读取，并在 Node mock 与 Chromium smoke 中验证往返，不引入 CNC 文件格式语义。

wasm-port/tests/browser/ini_panel_smoke.html

@@ -14,6 +14,12 @@
       loadSessionSnapshot,
       saveSessionSnapshot,
     } from "../../runtime/opfs/snapshot-store.js";
+    import {
+      loadGcodeProgram,
+      loadMachineTextFiles,
+      saveGcodeProgram,
+      saveMachineTextFiles,
+    } from "../../runtime/opfs/machine-file-store.js";
 
     const status = document.getElementById("status");
 
@@ -72,6 +78,18 @@ JOINTS = 3
       assertEqual(loadedSnapshot.payload.files.ini, opfsPath, "snapshot payload");
       assertEqual(loadedSnapshot.metadata.source, "browser-smoke", "snapshot metadata");
 
+      await saveMachineTextFiles("browser-smoke", {
+        ini: iniText,
+        toolTable: "T0 P0 ; no tool\n",
+        parameters: "5161 0.0\n",
+      });
+      const machineFiles = await loadMachineTextFiles("browser-smoke");
+      assertEqual(machineFiles.ini, iniText, "machine ini text");
+      assertEqual(machineFiles.toolTable, "T0 P0 ; no tool\n", "tool table text");
+      assertEqual(machineFiles.parameters, "5161 0.0\n", "parameter text");
+      await saveGcodeProgram("browser-smoke.ngc", "G0 X0 Y0\nM2\n");
+      assertEqual(await loadGcodeProgram("browser-smoke.ngc"), "G0 X0 Y0\nM2\n", "gcode text");
+
       status.textContent = "browser_ini_opfs_smoke=ok";
     } catch (error) {
       status.textContent = `browser_ini_opfs_smoke=fail ${error.stack || error.message}`;