fix(partner): resolve WeChat image picker auth denied on store create

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

apps/h5-partner/src/pages/StoreCreatePage.tsx

@@ -6,6 +6,7 @@ import OssUploadField from '../components/OssUploadField';
 import { request } from '../lib/api';
 import { resolveRegionBinding } from '../lib/china-region';
 import { fetchPartnerCities, type OpenCityOption } from '../lib/upload';
+import { isWechatEnv, weixinSdk } from '../lib/weixin';
 import {
   clearStoreDraft,
   defaultStoreForm,
@@ -41,6 +42,13 @@ export default function StoreCreatePage() {
     saveStoreDraft({ step, form });
   }, [step, form]);
 
+  useEffect(() => {
+    if (step !== 2 || !isWechatEnv()) return;
+    void weixinSdk.init().catch(() => {
+      /* OssUploadField 点击时会再次初始化 */
+    });
+  }, [step]);
+
   useEffect(() => {
     void fetchPartnerCities()
       .then((items) => {