更新了AI页和我的页，一级页面都重构完成。

pages/ai/aichat.js

@@ -146,6 +146,25 @@ Page({
     this.sendMessage()
   },
 
+  // 把常见问题清单作为一条 AI 消息铺进会话流（可随时唤起、可重复点选）
+  showQuickQuestions() {
+    const questions = this.data.quickQuestions || []
+    if (!questions.length) return
+
+    const questionMessage = {
+      id: `msg_${++this.messageIdCounter}`,
+      type: 'ai',
+      contentType: 'questions',
+      content: questions,
+      time: this.formatTime(new Date())
+    }
+
+    const messages = [...this.data.messages, questionMessage]
+    this.setData({ messages: messages })
+    this.saveChatHistory(messages)
+    this.scrollToBottom()
+  },
+
   sendMessage() {
     const content = this.data.inputValue.trim()
     if (!content) return