fix: 修复帮助内容加载、搜索滚动和账户同步的问题

- 完善帮助内容接口的响应校验，增加数据格式和范围验证
- 优化搜索页面的滚动位置管理，避免H5页面激活时的组件重建问题
- 增加账户切换时的定时器清理，防止内存泄漏和重复请求

packages/content/help/help.uvue

@@ -82,7 +82,8 @@
 	const targetId = ref(''); const targetItem = ref<FeedbackItem | null>(null); const targetLoading = ref(false); const targetError = ref('')
 	let detailRequest = 0
 	let visible = false; let generation = 0; let faqRequest = 0; let listRequest = 0; let page = 0
-	let owner = ''
+	let owner = ''; let accountTimer = 0
+	function stopAccountTimer() { if (accountTimer != 0) { clearInterval(accountTimer); accountTimer = 0 } }
 	const groups = computed((): HelpGroup[] => {
 		const results: HelpGroup[] = []
 		helpCategories.forEach((category: string) => {
@@ -122,8 +123,10 @@
 		if (!visible || ticket != generation) return false
 		const sessionToken = getSession()?.getString('token') ?? ''
 		if (sessionToken == token) return true
-		generation++; clearFeedback(); targetId.value = ''; owner = sessionToken; loggedIn.value = owner.length > 0
-		if (loggedIn.value) { restorePending(); reloadAfterAccountChange() }
+		generation++; faqRequest++; loading.value = false; errorMessage.value = ''; expanded.value = ''
+		clearFeedback(); targetId.value = ''; owner = sessionToken; loggedIn.value = owner.length > 0
+		if (loggedIn.value) restorePending()
+		reloadAfterAccountChange()
 		return false
 	}
 	reconcileAccount = () => { current(generation, owner) }
@@ -143,10 +146,12 @@
 	}
 	const load = async () => {
 		if (!visible || loading.value) return
+		const account = generation; const token = owner
+		if (!current(account, token)) return
 		const ticket = ++faqRequest
-		loading.value = true; errorMessage.value = ''
-		try { const items = await fetchHelpQuestions(); if (visible && ticket == faqRequest) questions.value = items }
-		catch (_error) { if (visible && ticket == faqRequest) errorMessage.value = '暂时无法加载帮助内容，请稍后重试' }
+		loading.value = true; errorMessage.value = ''; questions.value = []; expanded.value = ''
+		try { const items = await fetchHelpQuestions(); if (current(account, token) && ticket == faqRequest) questions.value = items }
+		catch (_error) { if (current(account, token) && ticket == faqRequest) errorMessage.value = '暂时无法加载帮助内容，请稍后重试' }
 		finally { if (ticket == faqRequest) loading.value = false }
 	}
 	async function loadFeedback(append: boolean) {
@@ -170,9 +175,11 @@
 		} finally { if (ticket == generation && request == listRequest) { feedbackLoading.value = false; loadingMore.value = false } }
 	}
 	function reloadFeedback() { loadFeedback(false) }
-	reloadAfterAccountChange = () => { reloadTarget(); reloadFeedback() }
+	reloadAfterAccountChange = () => { load(); if (tab.value == 'feedback') { reloadTarget(); reloadFeedback() } }
 	const loadMore = () => { loadFeedback(true) }
 	const changeTab = (value: string) => {
+		if (!visible) return
+		reconcileAccount()
 		tab.value = value
 		if (value == 'feedback') { reloadTarget(); reloadFeedback() } else if (questions.value.length == 0) load()
 	}
@@ -226,9 +233,10 @@
 		visible = true; generation++; const token = getSession()?.getString('token') ?? ''
 		if (token != owner) { if (owner.length > 0) targetId.value = ''; clearFeedback() }
 		owner = token; loggedIn.value = token.length > 0; restorePending(); load(); if (tab.value == 'feedback') { reloadTarget(); reloadFeedback() }
+		stopAccountTimer(); accountTimer = setInterval(() => { reconcileAccount() }, 1000)
 	})
-	onHide(() => { visible = false; generation++; faqRequest++; listRequest++; detailRequest++; targetItem.value = null; targetLoading.value = false; targetError.value = ''; loading.value = false; feedbackLoading.value = false; loadingMore.value = false; sending.value = false; records.value = [] })
-	onUnload(() => { visible = false; generation++; faqRequest++; clearFeedback() })
+	onHide(() => { visible = false; stopAccountTimer(); generation++; faqRequest++; listRequest++; detailRequest++; targetItem.value = null; targetLoading.value = false; targetError.value = ''; loading.value = false; feedbackLoading.value = false; loadingMore.value = false; sending.value = false; records.value = [] })
+	onUnload(() => { visible = false; stopAccountTimer(); generation++; faqRequest++; clearFeedback() })
 </script>
 <style>
 	.help-body { overflow: hidden; }