Fix return statement and else clause indentation in response handling

src/llm_router.py

@@ -159,11 +159,11 @@ class LLMRouter:
                     # Clean up reasoning tags if present
                     result = self._clean_reasoning_tags(result)
                     logger.info(f"Novita AI API generated response (length: {len(result)})")
-            return result
+                    return result
                 else:
                     logger.error("Novita AI API returned empty response")
                     return None
-            
+                
         except Exception as e:
             logger.error(f"Error calling Novita AI API: {e}", exc_info=True)
             raise