按规划继续工作

结论：补齐 LinuxCNC tooldata_common.cc 随机换刀器 load/save 验证边界，WASM/SDK/OPFS 只透传 random-toolchanger 配置；native、WASM、OPFS 和浏览器 smoke 验证已通过。

wasm-port/tests/browser/interp_smoke.html

@@ -235,6 +235,72 @@
         ].join("\n"),
       );
 
+      await saveMachineTextFiles("browser-random-toolchanger", {
+        ini: "[EMC]\nMACHINE = browser-random-toolchanger\n",
+        toolTable: [
+          "T2 P7 Z3.125 D1.5 I12 J34 Q4 ;browser random finish tool",
+          "T5 P9 X1 Y2 Z3 ;browser random rough tool",
+          "",
+        ].join("\n"),
+        parameters: [
+          "5161 10.5",
+          "5162 20.25",
+          "5220 1",
+          "5221 2.25",
+          "5399 44",
+          "",
+        ].join("\n"),
+      });
+      const loadedRandomSession = await loadMachineSessionFromOpfs(
+        interp,
+        "browser-random-toolchanger",
+        {
+          iniWasmPath: "/work/browser-random-machine.ini",
+          parameterWasmPath: "/work/browser-random-linuxcnc.var",
+          toolTableWasmPath: "/work/browser-random-tool.tbl",
+          randomToolChanger: true,
+        },
+      );
+      verifyExpectedOutput(
+        "opfs_load_random_tool_table",
+        loadedRandomSession.toolTable.result,
+        [
+          "tooldata_random_toolchanger=1",
+          "tooldata_load=0",
+          "tool_pocket_7.toolno=2",
+          "tool_pocket_7.pocketno=7",
+          "tool_pocket_7.z=3.125",
+          "tool_pocket_7.diameter=1.5",
+          "tool_pocket_7.frontangle=12",
+          "tool_pocket_7.backangle=34",
+          "tool_pocket_7.orientation=4",
+          "tool_pocket_7.comment=browser random finish tool",
+          "tool_pocket_9.toolno=5",
+          "tool_pocket_9.pocketno=9",
+          "tool_index_for_tool_2=7",
+        ].join("\n"),
+      );
+      await saveMachineToolTableToOpfs(
+        interp,
+        "browser-random-toolchanger",
+        { wasmPath: "/work/browser-random-tool.tbl" },
+      );
+      const savedRandomMachineFiles = await loadMachineTextFiles(
+        "browser-random-toolchanger",
+      );
+      verifyExpectedOutput(
+        "opfs_saved_random_tool_table_text",
+        savedRandomMachineFiles.toolTable,
+        [
+          "T2",
+          "P7",
+          ";browser random finish tool",
+          "T5",
+          "P9",
+          ";browser random rough tool",
+        ].join("\n"),
+      );
+
       status.textContent = "browser_interp_smoke=ok";
     } catch (error) {
       status.textContent = `browser_interp_smoke=fail ${error.stack || error.message}`;