feat(frontend): align single related/prevnext/maxheight with Zibll

Honor prevnext/authordesc/yiyan settings, multi-tax related queries with
orderby (incl. views), per-post maxheight override, and only expand content
when maxheight is enabled.

assets/admin/src/schema/sections/post-list/page.js

@@ -104,6 +104,8 @@ export const pageSchema = {
           { label: '随机', value: 'rand' },
           { label: '相关度', value: 'relevance' },
           { label: '时间', value: 'date' },
+          { label: '浏览量', value: 'views' },
+          { label: '更新时间', value: 'modified' },
         ], dependsOn: { key: 'post_related_enabled', value: true } },
         { key: 'post_related_title', label: '推荐标题', type: 'input', default: '相关推荐', dependsOn: { key: 'post_related_enabled', value: true } },
       ],