Add translation validation git hook

- Create validate-translations.js script to check all translation keys exist in all locales
- Add translation validation to pre-commit hook
- Validates that es, en, ca translation files have matching keys
- Blocks commits if translations are missing or inconsistent
- Prevents incomplete translations from being committed

.githooks/pre-commit

@@ -36,6 +36,19 @@ else
     fi
 fi
 
+echo ""
+echo "🔍 Validating translation files..."
+
+# Check if any translation files are staged
+if git diff --cached --name-only | grep -q "frontend/locales/"; then
+    # Run translation validation
+    if ! node scripts/validate-translations.js; then
+        exit 1
+    fi
+else
+    echo "✓ No translation files staged, skipping validation"
+fi
+
 echo ""
 echo "✅ All pre-commit checks passed"