Add 卓米会 mini program and admin server.

Initial commit of the WeChat mini program, Express backend, and admin console.

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

miniprogram/app.js

@@ -0,0 +1,11 @@
+const authUtil = require('./utils/auth')
+
+App({
+  onLaunch(options) {
+    authUtil.captureSharer(options && options.query)
+    authUtil.ensureLogin().catch(() => {})
+  },
+  onShow(options) {
+    authUtil.captureSharer(options && options.query)
+  }
+})