Add JSON files for Payment Gateway Interface and API documentation updates

- Created a new JSON file for the PaymentGatewayInterface.php, detailing its methods and return types.
- Added a JSON file for payment.md, documenting various API endpoints and their parameters, responses, and errors.
- Introduced a JSON file for fix-admin-modal-and-calendar.md, outlining issues and solutions related to admin modal and calendar functionalities.

assets/admin/pages/RepresentationSettlementPage.tsx

@@ -103,7 +103,7 @@ export default function RepresentationSettlementPage() {
         </div>
       </div>
 
-      <div className="stat-grid" style={{ gridTemplateColumns: 'repeat(3, 1fr)' }}>
+      <div className="stat-grid">
         {cards.map(c => (
           <div key={c.label} className="stat" style={{ background: 'var(--surface-3)' }}>
             <div className="lbl">{c.label}</div>
@@ -151,7 +151,7 @@ export default function RepresentationSettlementPage() {
           <h3 style={{ fontSize: 16 }}>درخواست‌های قبلی</h3>
         </div>
         <div style={{ overflowX: 'auto' }}>
-          <table className="tbl" style={{ width: '100%' }}>
+          <div className="table-wrap"><table className="tbl" style={{ width: '100%' }}>
             <thead><tr><th>مبلغ</th><th>وضعیت</th><th>توضیح مدیر</th><th>تاریخ</th></tr></thead>
             <tbody>
               {settlements.length === 0 && (
@@ -166,7 +166,7 @@ export default function RepresentationSettlementPage() {
                 </tr>
               ))}
             </tbody>
-          </table>
+          </table></div>
         </div>
         <Pagination page={page} total={settlementsTotal} limit={limit} onPageChange={setPage} />
       </div>