🔧 chore(classroom): 临时隐藏学生举手和提问按钮

- 注释掉学生角色的举手按钮和提问按钮组件
- 临时调整界面布局，待后续功能优化后恢复

src/client/mobile/components/Classroom/ClassroomLayout.tsx

@@ -263,12 +263,12 @@ export const ClassroomLayout = ({ children, role }: ClassroomLayoutProps) => {
                 </>
               )}
   
-              {role === Role.Student && (
+              {/* {role === Role.Student && (
                 <>
                   <StudentHandUpButton />
                   <StudentQuestionButton />
                 </>
-              )}
+              )} */}
             </div>
 
             {showShareLink && shareLink && (