fix: resolve 404 not found for user preferences api by correctly registering blueprint

inventory-backend/app/__init__.py

@@ -127,6 +127,19 @@ def create_app():
     except ImportError as e:
         print(f"❌ 错误: BOM 模块导入失败: {e}")
 
+    # -----------------------------------------------------
+    # 2.8 注册用户偏好模块 (User Preferences)
+    # -----------------------------------------------------
+    try:
+        from app.api.v1.user import user_bp
+        # 标准: /api/v1/user/preferences
+        app.register_blueprint(user_bp, url_prefix='/api/v1/user')
+        # 兼容: /api/user/preferences
+        app.register_blueprint(user_bp, url_prefix='/api/user', name='user_legacy')
+        print("✅ User Preferences 模块注册成功")
+    except ImportError as e:
+        print(f"❌ 错误: User Preferences 模块导入失败: {e}")
+
     # -----------------------------------------------------
     # 2.7 注册权限管理模块 (Permission) - [新增]
     # -----------------------------------------------------