refactor(用户信息): 重构用户信息获取逻辑，使用组合式函数替代直接API调用

将直接调用getUserInfoAPI改为使用useUserInfo组合式函数，统一用户信息获取逻辑
移除重复的图片错误处理代码，使用useImageLoader组合式函数

@@ -43,15 +43,16 @@ import { ref, computed, onMounted } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 import { useAuth } from '@/contexts/auth'
 import { showToast } from 'vant'
-import { getUserInfoAPI } from '@/api/users'
+import { useUserInfo } from '@/composables/useUserInfo'
 
 const route = useRoute()
 const router = useRouter()
 const { currentUser } = useAuth()
+const { getUserInfoFromLocal } = useUserInfo()
 
 /**
  * @var {import('vue').Ref<number>} unread_msg_count
- * @description 未读消息数量，来源于 getUserInfoAPI() 的返回值；用于控制“我的”图标右上角红点显示
+ * @description 未读消息数量，来源于 getUserInfoAPI() 的返回值；用于控制"我的"图标右上角红点显示
  */
 const unread_msg_count = ref(0)
 
@@ -62,9 +63,9 @@ const unread_msg_count = ref(0)
  */
 async function load_unread_msg_count() {
     try {
-        const { code, data } = await getUserInfoAPI()
-        if (code === 1) {
-            unread_msg_count.value = +data.unread_msg_count || 0
+        const userInfo = getUserInfoFromLocal()
+        if (userInfo) {
+            unread_msg_count.value = +userInfo.unread_msg_count || 0
         } else {
             unread_msg_count.value = 0
         }

@@ -141,13 +141,20 @@ import { useAuth } from "@/contexts/auth";
 import CheckInDialog from "@/components/ui/CheckInDialog.vue";
 import { getUserInfoAPI } from "@/api/users";
 import { showToast } from "vant";
-
 import { useTitle } from "@vueuse/core";
+import { useImageLoader } from "@/composables/useImageLoader";
+import { useUserInfo } from "@/composables/useUserInfo";
 
 const router = useRouter();
 const $route = useRoute();
 useTitle($route.meta.title);
 
+// 图片加载错误处理
+const { handleImageError } = useImageLoader()
+
+// 用户信息获取
+const { userInfo, refreshUserInfo } = useUserInfo()
+
 const profile = ref({});
 const checkIns = ref({});
 const isTeacher = ref(false);
@@ -158,18 +165,19 @@ const formatCheckInCount = (count) => {
 };
 
 onMounted(async () => {
-  const { code, data } = await getUserInfoAPI();
-  if (code === 1) {
-    profile.value = data.user;
-    checkIns.value = data.checkin;
-    checkIns.value.total_days = data.checkin.total_days || 0
-    checkIns.value.consecutive_days = data.checkin.consecutive_days || 0
-    checkIns.value.longest_consecutive_days = data.checkin.longest_consecutive_days || 0
-    isTeacher.value = data.is_teacher;
+  const userData = await refreshUserInfo();
+  if (userData) {
+    profile.value = userData;
+    checkIns.value = {
+      total_days: userData.total_days || 0,
+      consecutive_days: userData.consecutive_days || 0,
+      longest_consecutive_days: userData.longest_consecutive_days || 0
+    };
+    isTeacher.value = userData.is_teacher;
     // 处理消息中心的未读消息数量
     menuItems2.value.forEach(item => {
       if (item.path === '/profile/messages') {
-        item.badge = +data.unread_msg_count || 0;
+        item.badge = +(userData?.unread_msg_count || 0);
       }
     });
   }
@@ -217,12 +225,6 @@ const handleMenuClick = (path) => {
   }
 };
 
-// Handle image error
-const handleImageError = (e) => {
-  e.target.onerror = null;
-  e.target.src = "https://fastly.jsdelivr.net/npm/@vant/assets/cat.jpeg";
-};
-
 // Handle check-in type click
 const handleCheckInClick = (path) => {
   router.push(path);