feat(auth): enhance jwt token response with additional user data

Include more user information in the JWT token response to provide client applications with necessary user details like profile picture, auth method, and provider information.

app/services/user_service.py

@@ -257,4 +257,15 @@ class UserService:
         }
 
         access_token = jwt.encode(token_data, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
-        return {"access_token": access_token}
+        return {
+            "access_token": access_token,
+            "token_type": "bearer",
+            "expires_in": 28800,
+            "user_id": user_id,
+            "name": data.name,
+            "email": data.email,
+            "profile_picture": user_doc.get("profile_picture"),
+            "auth_method": data.mode,
+            "provider": data.provider if data.mode == "oauth" else None,
+            "security_info": None
+        }