fix(miniapp): add missing uuid and message-display utils

Commit the utility modules required by api.js, messages.js, and chat page
so WeChat DevTools can resolve require('./uuid') at runtime.

Co-authored-by: Cursor <cursoragent@cursor.com>

miniapp/utils/messages.js

@@ -1,6 +1,9 @@
+const { createUuid } = require('./uuid');
+const { buildMessageView } = require('./message-display');
+
 function createUserMessage(text) {
   return {
-    id: `mp_${Date.now()}_${Math.random().toString(16).slice(2)}`,
+    id: createUuid(),
     role: 'user',
     created: Math.floor(Date.now() / 1000),
     content: [{ type: 'text', text }],
@@ -25,13 +28,10 @@ function messageText(message) {
   return '';
 }
 
-function normalizeMessages(messages = []) {
-  return messages.map((message) => ({
-    id: message.id || `${message.role}_${message.created || Date.now()}`,
-    role: message.role || 'assistant',
-    text: messageText(message),
-    created: message.created || 0
-  }));
+function normalizeMessages(messages = [], options = {}) {
+  return messages
+    .map((message) => buildMessageView(message, options))
+    .filter(Boolean);
 }
 
 module.exports = {