按规划继续工作

结论：补齐显式工具表 override 路径的浏览器 OPFS 保存读回验证，继续通过 vendored LinuxCNC tooldata_save 路径覆盖。

wasm-port/tests/browser/interp_smoke.html

@@ -761,6 +761,40 @@
           "5399 101",
         ].join("\n"),
       );
+      const savedExplicitToolTable = await saveMachineToolTableToOpfs(
+        interp,
+        "browser-ini-override-session",
+        {
+          opfsPath: loadedIniOverrideSession.toolTable.opfsPath,
+          wasmPath: loadedIniOverrideSession.toolTable.wasmPath,
+        },
+      );
+      if (
+        savedExplicitToolTable.opfsPath !==
+        "linuxcnc/machines/browser-ini-override-session/browser-explicit-tool.tbl"
+      ) {
+        throw new Error(`unexpected explicit saved tool path: ${savedExplicitToolTable.opfsPath}`);
+      }
+      verifyExpectedOutput(
+        "opfs_save_explicit_tool_table",
+        savedExplicitToolTable.result,
+        [
+          "tooldata_save=0",
+          "tool_1.toolno=9",
+          "tool_1.pocketno=9",
+        ].join("\n"),
+      );
+      verifyExpectedOutput(
+        "opfs_saved_explicit_tool_table_text",
+        await loadTextFile(loadedIniOverrideSession.toolTable.opfsPath),
+        [
+          "T9",
+          "P9",
+          "Z+5.500000",
+          "D+0.625000",
+          ";browser explicit tool",
+        ].join("\n"),
+      );
 
       await saveMachineTextFiles("browser-invalid-param-file-session", {
         ini: [