Update app.py

app.py

@@ -2,14 +2,22 @@ from fastapi import FastAPI
 from pydantic import BaseModel
 from huggingface_hub import InferenceClient
 
-app = FastAPI()
+# Inicializar FastAPI
+app = FastAPI(title="Chat FastAPI", version="1.0")
+
+# Cliente del modelo
 MODEL_ID = "google/gemma-2b-it"
 client = InferenceClient(model=MODEL_ID)
 
+# Estructura del body que recibirá el endpoint
 class ChatRequest(BaseModel):
     message: str
     history: list[list[str]] | None = None
 
+@app.get("/")
+def home():
+    return {"message": "✅ Chat FastAPI está corriendo correctamente"}
+
 @app.post("/chat")
 def chat_endpoint(request: ChatRequest):
     history = request.history or []
@@ -22,7 +30,7 @@ def chat_endpoint(request: ChatRequest):
         response = ""
         for chunk in client.text_generation(prompt, max_new_tokens=128, stream=True):
             response += chunk.token.text
-        history.append((request.message, response.strip()))
+        history.append([request.message, response.strip()])
         return {"response": response.strip(), "history": history}
     except Exception as e:
         return {"response": f"⚠️ Error interno: {e}", "history": history}