feat(publish-dedup): disable already-published accounts and rework retry UX

In the admin publish modal, fetch the article's publish records, disable
accounts that already succeeded for the same article/platform, label
queued/publishing accounts inline, and route the success notification by
created vs existing task counts (with a dedicated warning for the
`desktop_publish_duplicate` server error).

Replace the "再次发送" mutation/popconfirm on both admin and desktop publish
management views with a "重新创建发布任务" action that calls the same Create
endpoint, only enables on failed/aborted/unknown rows, and reports created
vs existing task counts (with a tailored warning for `unknown` results
that may have already succeeded).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/desktop-client/src/renderer/components/DesktopShell.vue

@@ -60,7 +60,7 @@ const navItems = computed(() => {
     {
       to: '/publish-management',
       title: '发布管理',
-      description: '查看待发布队列、历史发送结果，并对文章再次发送',
+      description: '查看待发布队列、历史发送结果和账号工作台',
       count: data?.summary.queuedTasks ?? 0,
       icon: SendOutlined,
     },