补充 Node WASM 文件路径错误覆盖

结论：Node WASM 解释器 smoke 现在通过 Interp::open/read/execute 文件路径 ABI 验证现有负向 G-code fixture 的 LinuxCNC 错误输出。

wasm-port/tests/wasm/node/verify_interp_wasm.mjs

@@ -34,6 +34,45 @@ function verifyExpectedOutput(fixtureName, output, expectedText) {
   }
 }
 
+function verifyExpectedFileError(fixtureName, output, expectedText) {
+  assert.equal(
+    output.includes("file_open=0"),
+    true,
+    `${fixtureName}: file open`,
+  );
+
+  const expectedLines = expectedText.split("\n").filter(Boolean);
+  for (const expectedLine of expectedLines) {
+    if (expectedLine.startsWith("absent=")) {
+      const forbidden = expectedLine.slice("absent=".length);
+      assert.equal(
+        output.includes(forbidden),
+        false,
+        `${fixtureName}: unexpected ${forbidden}`,
+      );
+      continue;
+    }
+
+    if (expectedLine.startsWith("error_text=")) {
+      const message = expectedLine.slice("error_text=".length);
+      assert.equal(
+        output.includes(`file_error_text=${message}`),
+        true,
+        `${fixtureName}: ${message}`,
+      );
+      continue;
+    }
+
+    if (expectedLine.startsWith("canon_event=")) {
+      assert.equal(
+        output.includes(expectedLine),
+        true,
+        `${fixtureName}: ${expectedLine}`,
+      );
+    }
+  }
+}
+
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 const rootDir = resolve(__dirname, "../../..");
@@ -92,6 +131,21 @@ for (const fixtureName of INTERP_ERROR_FIXTURES) {
   verifyExpectedOutput(fixtureName, interp.runProgram(programText), expectedOutput);
 }
 
+for (const fixtureName of INTERP_ERROR_FIXTURES) {
+  const programPath = `/work/${fixtureName}-error.ngc`;
+  const programText = readFileSync(
+    resolve(rootDir, `tests/fixtures/gcode_errors/${fixtureName}.ngc`),
+    "utf8",
+  );
+  const expectedOutput = readFileSync(
+    resolve(rootDir, `tests/fixtures/canon_errors/${fixtureName}.expected`),
+    "utf8",
+  ).trimEnd();
+
+  interp.writeTextFile(programPath, programText);
+  verifyExpectedFileError(fixtureName, interp.runFile(programPath), expectedOutput);
+}
+
 for (const fixtureName of INTERP_FILE_FIXTURES) {
   const programPath = `/work/${fixtureName}.ngc`;
   const programText = readFileSync(