fix: 题目描述编辑器占满对话框宽度

src/view/admin/ProblemManageView.vue

@@ -697,8 +697,14 @@ onMounted(() => {
   gap: 12px;
 }
 
+.markdown-editor-wrapper {
+  width: 100%;
+  flex: 1;
+}
+
 .markdown-editor-wrapper :deep(.bytemd) {
   height: 300px;
+  width: 100%;
 }
 
 .markdown-editor-wrapper.case-description :deep(.bytemd) {