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/config.local.example.js

@@ -0,0 +1,5 @@
+// Copy to config.local.js (gitignored) to force local Portal while preparing a release.
+// Remove or rename config.local.js to use production https://m.tkmind.cn from config.js.
+module.exports = {
+  API_BASE_URL: 'http://127.0.0.1:8081',
+};