refactor(api): unify auth endpoints under /api, enhance signup

routes/user_auth/auth.py

@@ -1,19 +1,35 @@
 from flask import Blueprint, request, jsonify, session
 from services.UserService.user import UserService
 
-auth_bp = Blueprint("auth", __name__, url_prefix="/auth")
+auth_bp = Blueprint("auth", __name__, url_prefix="/api")
 user_service = UserService()
 
-
 @auth_bp.route("/signup", methods=["POST"])
 def signup():
     data = request.get_json()
+    if not data:
+        return jsonify({"message": "No data provided"}), 400
+    
+    required_fields = ['username', 'password']
+    for field in required_fields:
+        if not data.get(field):
+            return jsonify({"message": f"{field} is required"}), 400
+    
     try:
-        new_user = user_service.create_user(data["username"], data["password"])
+        new_user = user_service.create_user(
-        return (
+            username=data["username"],
-            jsonify({"message": "User created successfully", "username": new_user.username}),
+            password=data["password"],
-            201,
+            email=data.get("email"),
+            first_name=data.get("first_name"),
+            last_name=data.get("last_name")
         )
+        
+        return jsonify({
+            "message": "User created successfully", 
+            "username": new_user.username,
+            "user_id": new_user.id
+        }), 201
+        
     except ValueError as e:
         return jsonify({"message": str(e)}), 400
     except Exception as e:
@@ -21,15 +37,12 @@ def signup():
         print(f"Signup error: {e}")
         return jsonify({"message": "Internal server error"}), 500
 
-
 @auth_bp.route("/login", methods=["POST"])
 def login():
     data = request.get_json()
     username = data.get("username")
     password = data.get("password")
-
     print(f"Login attempt: username={username}, password={password}")
-
     try:
         user = user_service.verify_user(username, password)
         session["user_id"] = user.id
@@ -41,8 +54,7 @@ def login():
         print(f"Login error: {e}")
         return jsonify({"error": "Internal server error"}), 500
 
-
 @auth_bp.route("/logout", methods=["POST"])
 def logout():
     session.clear()
-    return jsonify({"message": "Logout successful"}), 200
+    return jsonify({"message": "Logout successful"}), 200