fix：修复冷启动丢失用户信息导致重复登录问题

src/pages/friend-battle.vue

@@ -9,7 +9,7 @@ import Signin from "@/components/Signin.vue";
 import CreateRoom from "@/components/CreateRoom.vue";
 import Avatar from "@/components/Avatar.vue";
 
-import { getRoomAPI, joinRoomAPI, getBattleDataAPI } from "@/apis";
+import { getRoomAPI, joinRoomAPI, getBattleDataAPI, getHomeData } from "@/apis";
 import { debounce, canEenter } from "@/util";
 
 import useStore from "@/store";
@@ -88,8 +88,26 @@ onShow(async () => {
 onLoad(async (options) => {
   if (options.roomID) {
     roomID.value = options.roomID;
-    if (user.value.id) enterRoom(options.roomID);
-    else showSignin.value = true;
+    if (user.value.id) {
+      // 内存中有用户状态，直接进房
+      enterRoom(options.roomID);
+    } else {
+      // 冷启动（如分享链接进入）时 Pinia 状态已重置，尝试用已存储的 token 静默恢复用户信息
+      const env = uni.getAccountInfoSync().miniProgram.envVersion;
+      const token = uni.getStorageSync(`${env}_token`);
+      if (token) {
+        try {
+          const homeData = await getHomeData();
+          if (homeData?.user) {
+            store.updateUser(homeData.user);
+            enterRoom(options.roomID);
+            return;
+          }
+        } catch {}
+      }
+      // token 不存在或已失效，弹出授权登录弹窗
+      showSignin.value = true;
+    }
   }
 });
 </script>