feat: add AI model config template

tests/test_config_service.py

@@ -54,6 +54,15 @@ class TestOutfitConfigHelpers(unittest.TestCase):
             "".encode("utf-8") + json.dumps([{"name": "z"}]).encode("utf-8"))
         self.assertEqual(cs.load_ai_models()[0]["name"], "z")
 
+    def test_default_ai_models_template_is_loadable_and_has_no_keys(self):
+        template = Path(__file__).parent.parent / "packaging" / "default_config" / "ai_models.json"
+        shutil.copy2(str(template), str(self.config_dir / "ai_models.json"))
+
+        models = cs.load_ai_models()
+
+        self.assertEqual([m["name"] for m in models], ["GPT Image 2", "Nano Banana 2"])
+        self.assertTrue(all(m.get("api_key") == "" for m in models))
+
     # -- outfit_prompt.txt ----------------------------------------------
 
     def test_prompt_default_when_missing(self):