fix(dashboard): Allow access to src/constants.mjs and fix lock-ops

`frontend-console-debug-agent` run:
- Fixed a 403 Forbidden error in `src/dashboard.mjs` preventing `src/constants.mjs` from loading by adding it to the `allowedPaths` whitelist.
- Refactored `src/lock-ops.mjs` to fix a critical syntax error in `LockPublisher` class.
- Fixed a typo in `src/cmd-check.mjs` (`queryLocksFn` -> `queryLocks`).
- Added `@playwright/test` for frontend debugging.
- Added `scripts/agent/debug_frontend.mjs` for reproduction.

Co-authored-by: PR0M3TH3AN <[email protected]>

scripts/agent/debug_frontend.mjs

@@ -0,0 +1,49 @@
+import { chromium } from '@playwright/test';
+
+(async () => {
+  const browser = await chromium.launch();
+  const page = await browser.newPage();
+
+  let errorCount = 0;
+
+  page.on('console', msg => {
+    const type = msg.type();
+    if (type === 'error' || type === 'warning') {
+      console.log(`CONSOLE [${type.toUpperCase()}]: ${msg.text()}`);
+      if (type === 'error') errorCount++;
+    }
+  });
+
+  page.on('pageerror', exception => {
+    console.log(`PAGE ERROR: ${exception}`);
+    errorCount++;
+  });
+
+  page.on('requestfailed', request => {
+    // Check if failure() is not null before accessing errorText
+    const failure = request.failure();
+    const errorText = failure ? failure.errorText : 'Unknown error';
+    console.log(`REQUEST FAILED: ${request.url()} - ${errorText}`);
+    errorCount++;
+  });
+
+  try {
+    console.log('Navigating to http://localhost:4173/dashboard/ ...');
+    await page.goto('http://localhost:4173/dashboard/');
+    console.log('Page loaded. Waiting 5s for any async errors...');
+    await page.waitForTimeout(5000);
+  } catch (e) {
+    console.error('Navigation failed:', e);
+    errorCount++;
+  }
+
+  await browser.close();
+
+  if (errorCount > 0) {
+    console.log(`\nFound ${errorCount} errors.`);
+    process.exit(1);
+  } else {
+    console.log('\nNo errors found.');
+    process.exit(0);
+  }
+})();