fix: isolate test_returns_primary_when_available from env (#1238)

tests/unit/test_config.py

@@ -699,12 +699,12 @@ class TestGetEffectiveOllamaModel:
     """get_effective_ollama_model walks fallback chain."""
 
     def test_returns_primary_when_available(self):
-        from config import get_effective_ollama_model
+        from config import get_effective_ollama_model, settings
 
         with patch("config.check_ollama_model_available", return_value=True):
             result = get_effective_ollama_model()
-            # Default is qwen3:14b
-            assert result == "qwen3:14b"
+            # Should return whatever the user's configured model is
+            assert result == settings.ollama_model
 
     def test_falls_back_when_primary_unavailable(self):
         from config import get_effective_ollama_model, settings