fix: replace deprecated antd APIs (Drawer width→size, Modal destroyOnClose→destroyOnHidden)

apps/admin/src/layouts/MainLayout.tsx

@@ -233,7 +233,7 @@ const MainLayout: React.FC = () => {
           placement="left"
           open={drawerOpen}
           onClose={() => setDrawerOpen(false)}
-          width={240}
+          size={240}
           styles={{ body: { padding: 0 } }}
           title="恭学教育基地"
         >

apps/admin/src/pages/Roles/index.tsx

@@ -236,7 +236,7 @@ const RolesPage: React.FC = () => {
         onOk={handleSubmit}
         onCancel={() => setModalOpen(false)}
         width={700}
-        destroyOnClose
+        destroyOnHidden
       >
         <Form form={form} layout="vertical">
           <Form.Item

apps/admin/src/pages/Schedules/index.tsx

@@ -476,7 +476,7 @@ const SchedulesPage: React.FC = () => {
             : null // no footer for detail mode
         }
         width={600}
-        destroyOnClose
+        destroyOnHidden
       >
         {modalMode === 'create' ? (
           <Form form={form} layout="vertical" style={{ marginTop: 16 }}>

apps/admin/src/pages/Users/index.tsx

@@ -227,7 +227,7 @@ const UsersPage: React.FC = () => {
         open={modalOpen}
         onOk={handleSubmit}
         onCancel={() => setModalOpen(false)}
-        destroyOnClose
+        destroyOnHidden
       >
         <Form form={form} layout="vertical">
           <Form.Item
@@ -278,7 +278,7 @@ const UsersPage: React.FC = () => {
         open={pwdModalOpen}
         onOk={handlePwdSubmit}
         onCancel={() => setPwdModalOpen(false)}
-        destroyOnClose
+        destroyOnHidden
       >
         <Form form={pwdForm} layout="vertical">
           <Form.Item