用户主页再减层：抽出 page context helper 并清理失效 profile CSS

page-user-home 收成薄壳，tab/统计/分页上下文迁入 aksrt_get_user_home_page_context；同步删除 profile-public-contacts 等失效样式，并让 .user-center 宽度规则落到现用 aksrt-profile 壳层。

assets/css/routes/user-home.css

@@ -387,28 +387,6 @@
   gap: 18px;
 }
 
-/* 联系方式增强 */
-.aksrt-user-home .profile-public-contacts .social-icon-link {
-  display: inline-flex;
-  align-items: center;
-  gap: 5px;
-  padding: 6px 12px;
-  border-radius: 100px;
-  font-size: 13px;
-  font-weight: 500;
-  color: var(--color-ink-2);
-  background: var(--surface-2);
-  border: 1px solid var(--color-line-soft, rgba(0,0,0,0.06));
-  text-decoration: none;
-  transition: all 0.2s ease;
-}
-
-.aksrt-user-home .profile-public-contacts .social-icon-link:hover {
-  color: var(--color-primary);
-  background: var(--color-primary-soft);
-  border-color: var(--color-primary);
-  transform: translateY(-1px);
-}
 
 .aksrt-user-home .aksrt-user-home__layout {
   align-items: start;