feat(front-submit): 1:1 写文章/投稿页对齐 zibll newposts

Register AKSRT 写文章/投稿 page template, wire header publish entry to
front submit URL, rewrite page-submit as dual-column TinyMCE compose with
featured cover, multi-category/topics/filters, pay box, drafts, and
capability-gated FrontSubmit AJAX (pay/featured traits).

assets/admin/src/pages/content/FooterTabbarSettings.vue

@@ -365,7 +365,7 @@ function getItemSummary(item) {
 }
 
 const addPresets = [
-  { label: '写文章', icon: 'fas fa-pen-fancy', url: '/post-new' },
+  { label: '写文章', icon: 'fas fa-pen-fancy', url: '/submit' },
   { label: '投稿页', icon: 'fas fa-file-alt', url: '/submit' },
   { label: '发布资源', icon: 'fas fa-cloud-upload-alt', url: '/resource-new' },
   { label: '创作中心', icon: 'fas fa-palette', url: '/creator' },