fix(admin): repair class, role, and room views

Use the RBAC user endpoint for teacher selection, restore role table columns, correct Ant Design props, and add typed room bed and locker responses.

apps/admin/src/pages/Classes/detail.tsx

@@ -286,7 +286,7 @@ const ClassDetailPage: React.FC = () => {
 
   const openTeacherModal = async () => {
     try {
-      const res = await api.get('/users') as UserItem[];
+      const res = await api.get('/rbac/users') as UserItem[];
       setAllUsers(res || []);
       setTeacherUserId(undefined);
       setTeacherRole('subject_teacher');
@@ -576,7 +576,7 @@ const ClassDetailPage: React.FC = () => {
                   onOk={handleAddTeacher}
                   onCancel={() => setTeacherModalOpen(false)}
                 >
-                  <Space orientation="vertical" style={{ width: '100%' }}>
+                  <Space direction="vertical" style={{ width: '100%' }}>
                     <Select
                       style={{ width: '100%' }}
                       placeholder="选择教师"

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

@@ -42,11 +42,6 @@ interface ClassFormValues {
   notes?: string;
 }
 
-interface ClassQueryParams {
-  status?: string;
-  classType?: string;
-}
-
 // ---- Constants ----
 
 const STATUS_MAP: Record<string, { color: string; text: string }> = {