fix: 尝试修复错误直接对话没了的问题（不知道好使不）

utils/SydneyAIClient.js

@@ -674,11 +674,11 @@ export default class SydneyAIClient {
     }
     ws.send(`${messageJson}`)
 
+    try {
       const {
         message: reply,
         conversationExpiryTime
       } = await messagePromise
-
       const replyMessage = {
         id: crypto.randomUUID(),
         parentMessageId: userMessage.id,
@@ -690,7 +690,7 @@ export default class SydneyAIClient {
         conversation.messages.push(userMessage)
         conversation.messages.push(replyMessage)
       }
-    await this.conversationsCache.set(conversationKey, conversation)
+
       return {
         conversationSignature,
         conversationId,
@@ -702,6 +702,10 @@ export default class SydneyAIClient {
         details: reply,
         apology: Config.sydneyApologyIgnored && apology
       }
+    } catch (err) {
+      await this.conversationsCache.set(conversationKey, conversation)
+      throw err
+    }
   }
 
   /**