fix: skip evaluation if EVALUATOR_MODEL is not specified

aider_gitea/__init__.py

@@ -472,6 +472,10 @@ def solve_issue_in_repository(
         if not resolution.success:
             return resolution
 
+        # Disable evaluation if no evaluator model is specified
+        if not EVALUATOR_MODEL:
+            return resolution
+
         # Verify whether this is a satisfactory solution
         if verify_solution(repository_path, issue_content):
             return resolution