diff --git a/src/main/main.js b/src/main/main.js
index 41d51cc..2d53394 100644
--- a/src/main/main.js
+++ b/src/main/main.js
@@ -54,7 +54,7 @@ function warn(message) {
 // 页面里的外链（如"申请 Key"）一律交给系统浏览器，不在应用内开窗口
 function guardNavigation(win) {
   win.webContents.setWindowOpenHandler(({ url }) => {
-    if (/^https?:///i.test(url)) shell.openExternal(url);
+    if (/^https?:\/\//i.test(url)) shell.openExternal(url);
     return { action: 'deny' };
   });
   win.webContents.on('will-navigate', (event) => event.preventDefault());
diff --git a/test/syntax.test.js b/test/syntax.test.js
new file mode 100644
index 0000000..be26b6a
--- /dev/null
+++ b/test/syntax.test.js
@@ -0,0 +1,28 @@
+'use strict';
+
+// 主进程依赖 Electron，单元测试 require 不到；至少保证每个源文件都能被解析。
+const test = require('node:test');
+const assert = require('node:assert');
+const fs = require('fs');
+const path = require('path');
+const { execFileSync } = require('child_process');
+
+function jsFiles(dir) {
+  return fs.readdirSync(dir, { withFileTypes: true }).flatMap((e) => {
+    const p = path.join(dir, e.name);
+    if (e.isDirectory()) return jsFiles(p);
+    return e.name.endsWith('.js') ? [p] : [];
+  });
+}
+
+test('src 下所有 JS 文件语法正确', () => {
+  const files = jsFiles(path.join(__dirname, '..', 'src'));
+  assert.ok(files.length > 10);
+  for (const f of files) {
+    try {
+      execFileSync(process.execPath, ['--check', f], { stdio: 'pipe' });
+    } catch (err) {
+      assert.fail(`${path.relative(process.cwd(), f)}\n${err.stderr}`);
+    }
+  }
+});