feat: 优化账户切换时的页面状态一致性，增加登录回跳校验和课程阅读新逻辑

- 增加账户状态监听定时器，页面切换时自动校验账户归属，避免跨账户操作
- 新增登录回跳路径校验函数，限制仅允许指定页面回跳，防止非法跳转
- 课程页改为整篇连续阅读，底部仅一次标记已读，兼容历史记录
- 完善助手、对比页、资料填写页等多处的账户状态校验逻辑，防止错版数据提交
- 优化账户资料请求逻辑，增加版本校验，避免旧请求覆盖新数据

packages/content/classroom/classroom.uvue

@@ -33,7 +33,7 @@
 
 <script setup lang="uts">
 import { usePageLayout } from '@/services/layout.uts'
-import { fetchLessons, FinanceLesson } from '@/services/content.uts'
+import { fetchLessons, FinanceLesson, validateContentAppend } from '@/services/content.uts'
 import AppHeader from '@/components/AppHeader.uvue'
 import AppIcon from '@/components/AppIcon.uvue'
 const { contentStyle, pageStyle } = usePageLayout()
@@ -51,10 +51,11 @@ async function load(append: boolean) {
     if (!visible || loading.value || loadingMore.value || (append && !hasMore.value)) return
     const request = append ? generation : ++generation
     if (append) { loadingMore.value = true; moreError.value = '' }
-    else { loading.value = true; error.value = ''; lessons.value = []; total.value = 0; hasMore.value = false; page = 1 }
+    else { loading.value = true; error.value = ''; moreError.value = ''; lessons.value = []; total.value = 0; hasMore.value = false; page = 1 }
     try {
         const result = await fetchLessons(activeTopic.value, append ? page + 1 : 1)
         if (!visible || request != generation) return
+        if (append) validateContentAppend(lessons.value.map((item: FinanceLesson): string => item.id), result.items.map((item: FinanceLesson): string => item.id))
         lessons.value = append ? lessons.value.concat(result.items) : result.items
         total.value = result.total; hasMore.value = result.hasMore
         if (append) page++