Add Ollama connection check and better error messages

llm_providers.py

@@ -314,6 +314,22 @@ def _call_anthropic(model: str, prompt: str, system_prompt: str = None) -> str:
 # ----------------------------------------
 # OLLAMA (LOCAL)
 # ----------------------------------------
+def check_ollama_connection() -> dict:
+    """Verifica se Ollama está acessível."""
+    endpoint = LLM_PROVIDERS["ollama"]["endpoint"]
+    try:
+        res = requests.get(f"{endpoint}/api/tags", timeout=10)
+        if res.status_code == 200:
+            models = [m.get("name") for m in res.json().get("models", [])]
+            return {"status": "ok", "models": models, "endpoint": endpoint}
+        return {"status": "error", "code": res.status_code, "endpoint": endpoint}
+    except requests.exceptions.Timeout:
+        return {"status": "timeout", "endpoint": endpoint}
+    except requests.exceptions.ConnectionError:
+        return {"status": "unreachable", "endpoint": endpoint}
+    except Exception as e:
+        return {"status": "error", "message": str(e), "endpoint": endpoint}
+
 def _call_ollama(model: str, prompt: str, system_prompt: str = None) -> str:
     """Chama Ollama local."""
     endpoint = LLM_PROVIDERS["ollama"]["endpoint"]
@@ -333,6 +349,10 @@ def _call_ollama(model: str, prompt: str, system_prompt: str = None) -> str:
         if res.status_code == 200:
             return res.json().get("response", "")
         return f"Erro Ollama: {res.status_code} - {res.text}"
+    except requests.exceptions.Timeout:
+        return f"[TIMEOUT] Ollama não respondeu em 120s. Verifique se o serviço está rodando em {endpoint}"
+    except requests.exceptions.ConnectionError:
+        return f"[CONNECTION ERROR] Não conseguiu conectar ao Ollama em {endpoint}. Verifique se o container Ollama está na mesma rede Docker."
     except Exception as e:
         return f"Erro Ollama: {str(e)}"