fix：删除冗余代码+创建房间表单默认不选择

src/pages/battle-room.vue

@@ -10,7 +10,6 @@ import ScreenHint from "@/components/ScreenHint.vue";
 import {
   getRoomAPI,
   exitRoomAPI,
-  startRoomAPI,
   chooseTeamAPI,
   getReadyAPI,
   kickPlayerAPI,
@@ -208,10 +207,6 @@ const chooseTeam = async (team) => {
   refreshMembers(result.members);
 };
 
-const exitRoom = async () => {
-  uni.navigateBack();
-};
-
 /** 待确认踢出的玩家信息 */
 const playerToKick = ref(null);
 /** 控制踢出确认弹窗的显示状态 */

src/pages/friend-battle.vue

@@ -162,7 +162,8 @@ onLoad(async (options) => {
         <view v-if="warnning" class="warnning">
           {{ warnning }}
         </view>
-        <CreateRoom v-if="!warnning" :onConfirm="() => (showModal = false)" />
+        <!-- showModal 关闭时立即销毁组件，重开时重建，确保选项重置为 0 -->
+        <CreateRoom v-if="!warnning && showModal" :onConfirm="() => (showModal = false)" />
       </SModal>
       <Signin :show="showSignin" :onClose="onSignin" />
     </view>