feat(h5-auth): restore partner and shop WeChat login

Re-enable one-tap WeChat login, post-SMS OAuth bind, and quick login gates so partner/shop openId flows work again on staging.

apps/h5-shop/src/contexts/StoreSessionContext.tsx

@@ -7,6 +7,8 @@ import {
   useState,
   type ReactNode,
 } from 'react';
+import { stripOAuthParamsFromLocation } from '@dukang/weixin-sdk';
+import { isWxAuthorizeEnabled } from '@dukang/shared-types';
 import {
   clearAuth,
   ensureSession,
@@ -14,6 +16,12 @@ import {
   type ShopSessionPayload,
   type StoreSessionStore,
 } from '../lib/api';
+import {
+  fetchClientConfig,
+  handleShopWechatCallback,
+  handleShopWechatLoginResult,
+} from '../lib/wechat-auth';
+import { isWechatEnv } from '../lib/weixin';
 
 type StoreSessionContextValue = {
   ready: boolean;
@@ -26,6 +34,12 @@ type StoreSessionContextValue = {
 
 const StoreSessionContext = createContext<StoreSessionContextValue | null>(null);
 
+function deriveSelectStore(session: ShopSessionPayload, nextStore: StoreSessionStore | null) {
+  const storeId = nextStore?.storeId || session.selectedStoreId || '';
+  const stores = session.stores ?? nextStore?.stores ?? [];
+  return stores.length > 1 && !storeId;
+}
+
 export function StoreSessionProvider({ children }: { children: ReactNode }) {
   const [ready, setReady] = useState(false);
   const [authenticated, setAuthenticated] = useState(false);
@@ -43,9 +57,7 @@ export function StoreSessionProvider({ children }: { children: ReactNode }) {
         }
       : null;
     setStore(nextStore);
-    const storeId = nextStore?.storeId || session.selectedStoreId || '';
-    const stores = session.stores ?? nextStore?.stores ?? [];
-    setNeedsSelectStore(stores.length > 1 && !storeId);
+    setNeedsSelectStore(deriveSelectStore(session, nextStore));
   }, []);
 
   const resetSession = useCallback(() => {
@@ -59,6 +71,23 @@ export function StoreSessionProvider({ children }: { children: ReactNode }) {
     let cancelled = false;
     (async () => {
       try {
+        const params = new URLSearchParams(window.location.search);
+        if (isWechatEnv() && params.get('code')) {
+          try {
+            const config = await fetchClientConfig();
+            if (isWxAuthorizeEnabled(config)) {
+              const result = await handleShopWechatCallback();
+              if (result && !cancelled) {
+                const session = handleShopWechatLoginResult(result);
+                if (session) applySession(session);
+              }
+              stripOAuthParamsFromLocation();
+            }
+          } catch {
+            stripOAuthParamsFromLocation();
+          }
+        }
+
         const result = await ensureSession();
         if (cancelled) return;
         setAuthenticated(result.authenticated);
@@ -73,7 +102,7 @@ export function StoreSessionProvider({ children }: { children: ReactNode }) {
     return () => {
       cancelled = true;
     };
-  }, [resetSession]);
+  }, [applySession, resetSession]);
 
   const value = useMemo(
     () => ({ ready, authenticated, needsSelectStore, store, applySession, resetSession }),