[feature/backend] update put /users/me endpoint, allow setting username and display name

api/schemas/paths/users.yaml

@@ -216,14 +216,23 @@ user_me:
           schema:
             type: object
             properties:
+              username:
+                type: string
+                minLength: 3
+                maxLength: 32
+              display_name:
+                type: string
+                maxLength: 64
               email:
                 type: string
                 format: email
               current_password:
                 type: string
+                description: 当修改密码时必填
               new_password:
                 type: string
                 minLength: 8
+                description: 新密码，如果要修改密码则必填
     responses:
       '200':
         description: 用户信息更新成功