fix(menu): rename component_key to componentKey for consistency

apps/box-mgnt-api/src/mgnt-backend/core/menu/menu.dto.ts

@@ -97,7 +97,7 @@ export class MenuDto {
     example: '@/views/user/manage/index.vue',
   })
   @IsString()
-  component_key: string;
+  componentKey: string;
 
   @ApiProperty({
     description: '菜单元信息（对应前端路由 meta 字段）',