address copilot nits

Author: steven10a

src/guardrails/_base_client.py

@@ -287,7 +287,6 @@ def _mask_text(text: str) -> str:
             # Check for encoded PII if enabled
             has_encoded_pii = False
             encoded_candidates = []
-            decoded_text = normalized
 
             if detect_encoded_pii:
                 decoded_text, encoded_candidates = _build_decoded_text(normalized)

tests/unit/test_base_client.py

@@ -295,7 +295,7 @@ def test_apply_preflight_modifications_structured_content_with_unicode_obfuscati
 
     # Should detect and mask the obfuscated email
     assert "<EMAIL_ADDRESS>" in modified[0]["content"][0]["text"]  # noqa: S101
-    assert "@" not in modified[0]["content"][0]["text"] or "＠" not in modified[0]["content"][0]["text"]  # noqa: S101
+    assert "@" not in modified[0]["content"][0]["text"] and "＠" not in modified[0]["content"][0]["text"]  # noqa: S101
 
 
 def test_apply_preflight_modifications_structured_content_with_url_encoded_pii() -> None: