fix configs validation of models

src/app/configs.py

@@ -78,36 +78,38 @@ class Strategy(BaseModel):
 
 class ModelsConfig(BaseModel):
     gemini: list[AppModel] = [AppModel()]
-    gpt: list[AppModel] = [AppModel(name="gpt-4o", label="OpenAIChat")]
+    gpt: list[AppModel] = []
-    mistral: list[AppModel] = [AppModel(name="mistral-large-latest", label="Mistral")]
+    mistral: list[AppModel] = []
-    deepseek: list[AppModel] = [AppModel(name="deepseek-chat", label="DeepSeek")]
+    deepseek: list[AppModel] = []
-    # xai: list[AppModel] = [AppModel(name="grok-3", label="xAI")]
     ollama: list[AppModel] = []
 
     @property
     def all_models(self) -> list[AppModel]:
-        return self.gemini + self.ollama + self.gpt + self.mistral + self.deepseek # + self.xai
+        return self.gemini + self.ollama + self.gpt + self.mistral + self.deepseek
 
     def validate_models(self) -> None:
         """
-        Validate the configured models for each provider.
+        Validate the configured models for each supported provider.
         """
         self.__validate_online_models(self.gemini, clazz=Gemini, key="GOOGLE_API_KEY")
         self.__validate_online_models(self.gpt, clazz=OpenAIChat, key="OPENAI_API_KEY")
         self.__validate_online_models(self.mistral, clazz=MistralChat, key="MISTRAL_API_KEY")
         self.__validate_online_models(self.deepseek, clazz=DeepSeek, key="DEEPSEEK_API_KEY")
-        # self.__validate_online_models(self.xai, clazz=xAI, key="XAI_API_KEY")
-
         self.__validate_ollama_models()
 
     def __validate_online_models(self, models: list[AppModel], clazz: type[Model], key: str | None = None) -> None:
         """
-        Validate models for online providers like Gemini.
+        Validate models for online providers that require an API key.
+        If the models list is empty, no validation is performed and the method returns immediately.
+        If the API key is not set, the models list will be cleared.
         Args:
             models: list of AppModel instances to validate
             clazz: class of the model (e.g. Gemini)
             key: API key required for the provider (optional)
         """
+        if not models:
+            return
+
         if key and os.getenv(key) is None:
             log.warning(f"No {key} set in environment variables for {clazz.__name__}.")
             models.clear()
@@ -131,7 +133,7 @@ class ModelsConfig(BaseModel):
                 else:
                     not_availables.append(model.name)
             if not_availables:
-                log.warning(f"Ollama models not available: {not_availables}")
+                log.warning(f"Ollama models not available, but defined in configs: {not_availables}")
 
             self.ollama = [model for model in self.ollama if model.model]