feat: 新建会话id生成

pages/learning-assistant/learning-assistant.vue

@@ -172,7 +172,8 @@
 </template>
 
 <script setup lang="ts">
-import { nextTick, onMounted, onUnmounted, ref } from 'vue'
+import { nextTick, onUnmounted, ref } from 'vue'
+import { onShow } from '@dcloudio/uni-app'
 import {
 	createLearningAssistantSession,
 	runClinicalThinkingBooksWorkflow,
@@ -217,6 +218,7 @@ const selectedAssistantType = ref<'clinical-books' | ''>('')
 let toastTimer: ReturnType<typeof setTimeout> | null = null
 let streamAbortController: AbortController | null = null
 let workflowAbortController: AbortController | null = null
+let assistantSessionPromise: Promise<LearningAssistantSession> | null = null
 
 function selectClinicalBooksType() {
 	if (sending.value) return
@@ -289,26 +291,37 @@ async function handleSend() {
 
 async function ensureAssistantSession(title: string) {
 	if (assistantSession.value) return assistantSession.value
-	const session = await createLearningAssistantSession(title)
-	assistantSession.value = session
-	uni.setStorageSync('clinical-thinking-learning-assistant-session', session)
-	return session
+	if (assistantSessionPromise) return assistantSessionPromise
+	return createFreshAssistantSession(title)
 }
 
 async function initializeAssistantSession() {
 	try {
-		const storedSession = uni.getStorageSync('clinical-thinking-learning-assistant-session')
-		if (storedSession && typeof storedSession === 'object') {
-			assistantSession.value = storedSession as LearningAssistantSession
-			return
-		}
-		assistantSession.value = await createLearningAssistantSession('AI 学习助手')
-		uni.setStorageSync('clinical-thinking-learning-assistant-session', assistantSession.value)
+		assistantSession.value = null
+		await createFreshAssistantSession('AI 学习助手')
 	} catch (error) {
 		showToast(error instanceof Error ? error.message : '新建会话失败')
 	}
 }
 
+function createFreshAssistantSession(title: string) {
+	const request = createLearningAssistantSession(title)
+	assistantSessionPromise = request
+	return request
+		.then(session => {
+			if (assistantSessionPromise === request) {
+				assistantSession.value = session
+			}
+			return session
+		})
+		.catch(error => {
+			if (assistantSessionPromise === request) {
+				assistantSessionPromise = null
+			}
+			throw error
+		})
+}
+
 function scrollToBottom() {
 	nextTick(() => {
 		scrollTop.value += 1000
@@ -324,7 +337,7 @@ function showToast(message: string) {
 	}, 1800)
 }
 
-onMounted(() => {
+onShow(() => {
 	void initializeAssistantSession()
 })