补充浏览器随机刀库保存覆盖

结论：浏览器解释器 smoke 现在验证 random-toolchanger 场景下 vendored LinuxCNC tooldata_save 的 C ABI 返回结果，再检查 OPFS 写回文本。

wasm-port/tests/browser/interp_smoke.html

@@ -396,11 +396,20 @@
           "tool_index_for_tool_2=7",
         ].join("\n"),
       );
-      await saveMachineToolTableToOpfs(
+      const savedRandomToolTable = await saveMachineToolTableToOpfs(
         interp,
         "browser-random-toolchanger",
         { wasmPath: "/work/browser-random-tool.tbl" },
       );
+      verifyExpectedOutput(
+        "opfs_save_random_tool_table",
+        savedRandomToolTable.result,
+        [
+          "tooldata_save=0",
+          "tool_pocket_7.toolno=2",
+          "tool_pocket_9.toolno=5",
+        ].join("\n"),
+      );
       const savedRandomMachineFiles = await loadMachineTextFiles(
         "browser-random-toolchanger",
       );