Fix CI to check for missing translations (#8486)

Co-authored-by: openhands <openhands@all-hands.dev>

.github/workflows/lint.yml

@@ -30,11 +30,12 @@ jobs:
         run: |
           cd frontend
           npm install --frozen-lockfile
-      - name: Lint and TypeScript compilation
+      - name: Lint, TypeScript compilation, and translation checks
         run: |
           cd frontend
           npm run lint
           npm run make-i18n && tsc
+          npm run check-translation-completeness
 
   # Run lint on the python code
   lint-python:

tests/unit/frontend/test_translation_completeness.py

@@ -0,0 +1,33 @@
+"""Test that the translation completeness check works correctly."""
+
+import os
+import subprocess
+import unittest
+
+
+class TestTranslationCompleteness(unittest.TestCase):
+    """Test that the translation completeness check works correctly."""
+
+    def test_translation_completeness_check_runs(self):
+        """Test that the translation completeness check script can be executed."""
+        frontend_dir = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(__file__)))), "frontend")
+        script_path = os.path.join(frontend_dir, "scripts", "check-translation-completeness.cjs")
+        
+        # Verify the script exists
+        self.assertTrue(os.path.exists(script_path), f"Script not found at {script_path}")
+        
+        # Verify the script is executable
+        self.assertTrue(os.access(script_path, os.X_OK), f"Script at {script_path} is not executable")
+        
+        # Run the script (it may fail due to missing translations, but we just want to verify it runs)
+        try:
+            subprocess.run(
+                ["node", script_path], 
+                cwd=frontend_dir, 
+                check=False, 
+                capture_output=True, 
+                text=True
+            )
+            # We don't assert on the return code because it might fail due to missing translations
+        except Exception as e:
+            self.fail(f"Failed to run translation completeness check: {e}")