fix: check command return code before parsing model output to avoid parsing error messages as models

Author: jzhu

code_assistant_manager/endpoints.py

@@ -280,8 +280,13 @@ def fetch_models(
             )
 
             output = result.stdout.strip()
-            if not output and result.stderr:
-                print(f"Warning: Command returned error: {result.stderr}")
+            if result.returncode != 0:
+                print(f"Warning: Command failed with return code {result.returncode}")
+                if result.stderr:
+                    print(f"Command stderr: {result.stderr}")
+                return True, models
+            if not output:
+                print("Warning: Command returned no output")
                 return True, models
 
             # Parse output