feat(recharge): add points recharge agreement flow

- add new API request for fetching points top up agreement content
- update recharge footer with agreement checkbox and protocol link
- add agreement popup modal to display full agreement text
- add payment pre-validation to enforce agreement acceptance before payment
- handle loading and error states for agreement retrieval
- adjust recharge footer layout to accommodate new UI elements

src/request/api/AigcApi.js

@@ -36,6 +36,10 @@ function getCreditLedgerPage(args) {
   return request.post("/hotelBiz/credit/ledger/page", args);
 }
 
+function getPointsTopUpAgreement() {
+  return request.get("/hotelBiz/mainScene/pointsTopUpAgreement", {});
+}
+
 function createAigcGeneratorTaskShare(args) {
   return request.post("/hotelBiz/aigcGeneratorTask/share/create", args);
 }
@@ -54,6 +58,7 @@ export {
   getRechargeOptions,
   rechargeCredit,
   getCreditLedgerPage,
+  getPointsTopUpAgreement,
   createAigcGeneratorTaskShare,
   getAigcGeneratorTaskShareDetail,
 };