Fix OpenAI client init

app/smart_recommendation.py

@@ -12,7 +12,15 @@ from app.models import BudgetRecommendation, CategoryExpense
 
 load_dotenv()
 OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
-openai_client = OpenAI(api_key=OPENAI_API_KEY) if OPENAI_API_KEY else None
+
+def _build_openai_client():
+    if not OPENAI_API_KEY:
+        return None
+    try:
+        return OpenAI(api_key=OPENAI_API_KEY)
+    except Exception as exc:
+        print(f"OpenAI client initialization failed: {exc}")
+        return None
 
 class SmartBudgetRecommender:
     """
@@ -24,7 +32,7 @@ class SmartBudgetRecommender:
     
     def __init__(self, db):
         self.db = db
-        self.openai_client = openai_client
+        self.openai_client = _build_openai_client()
     
     def get_recommendations(self, user_id: str, month: int, year: int) -> List[BudgetRecommendation]:
         """

requirements.txt

@@ -5,4 +5,5 @@ pydantic==2.5.0
 python-multipart==0.0.6
 openai==1.51.0
 python-dotenv==1.0.1
+httpx==0.27.0