feat(miniapp): add privacy consent and legal pages

Show privacy popup on launch, gate login on legal consent, and link
user agreement and privacy policy pages in the mini program.

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

miniapp/app.js

@@ -1,12 +1,14 @@
 const { getStoredSession, setApiBaseUrl, getMiniProgramAppId, isTouristMode, getApiBaseUrl } = require('./utils/api');
 const { API_BASE_URL } = require('./utils/config');
+const { getPrivacySetting } = require('./utils/privacy');
 
 App({
   globalData: {
     user: null,
+    privacySetting: null,
   },
 
-  onLaunch() {
+  async onLaunch() {
     setApiBaseUrl(API_BASE_URL);
     const appId = getMiniProgramAppId();
     console.info('[TKMind miniapp] API_BASE_URL =', getApiBaseUrl() || API_BASE_URL);
@@ -18,5 +20,6 @@ App({
     if (session?.user) {
       this.globalData.user = session.user;
     }
+    this.globalData.privacySetting = await getPrivacySetting();
   },
 });