fix: merge main, address code review feedback for security fix PR #816

- Merge origin/main into branch (resolve conflict in integrations_dashboard.html)
- Add defensive JSON parsing with try/except for integration.config
- Wrap tester() call in try/except to prevent 500 errors from bad config
- Add i18n key integrations.connection_test_failed_fallback in en.json
- Reference i18n key in template JS fallback message
- Update SECURITY_AUDIT.md: add fix date (2026-03-23), update doc date
- Remove accidental revert.sh file
- Fix missing MagicMock/patch imports in test file
- Add tests for invalid JSON config and tester exception error paths

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>
Agent-Logs-Url: https://github.com/christianlouis/DocuElevate/sessions/daebb70e-059a-4601-8864-88eef49f99cf

tests/test_file_upload.py

@@ -345,7 +345,7 @@ class TestUploadErrorHandling:
 
     def test_upload_disk_write_failure(self, client: TestClient):
         """Test handling of disk write failures."""
-        with patch("builtins.open", side_effect=IOError("Disk full")):
+        with patch("aiofiles.open", side_effect=IOError("Disk full")):
             pdf_content = b"%PDF-1.4\n%EOF"
 
             response = client.post(