Update fact_checker.py

Author: Kaushalsurana

fact_checker_cli/fact_checker.py

@@ -117,6 +117,8 @@ def check_claim(self, text: str, model: str = DEFAULT_MODEL, use_structured_outp
         Returns:
             The parsed response containing fact check results.
         """
+        if not text or not text.strip():
+            return {"error": "Input text is empty. Cannot perform fact check."}
         user_prompt = f"Fact check the following text and identify any false or misleading claims:\n\n{text}"
 
         headers = {