用户主页减层：拆出 panel/sidebar partial 并清理失效 CSS 选择器

把 page-user-home 的内容面板与侧栏抽到 user-home partial，删除公开主页已不再使用的 uc-header/user-home-stats 等 CSS 残段。

assets/css/routes/user-home.css

@@ -420,58 +420,6 @@
   gap: 18px;
 }
 
-.aksrt-user-home .uc-header--no-cover {
-  background: var(--surface-1);
-  border-radius: var(--radius-lg, 12px);
-  border: 1px solid var(--color-line-soft, rgba(0, 0, 0, 0.06));
-}
-
-.aksrt-user-home .uc-header--no-cover .uc-header__content {
-  padding-top: 24px;
-}
-
-.aksrt-user-home .user-home-stats {
-  display: flex;
-  flex-wrap: wrap;
-  gap: 10px;
-  margin-top: 14px;
-}
-
-.aksrt-user-home .user-home-stats__item {
-  display: inline-flex;
-  align-items: center;
-  gap: 6px;
-  min-height: 34px;
-  padding: 0 12px;
-  border-radius: 999px;
-  background: var(--surface-2);
-  color: var(--color-ink-3);
-  font-size: 13px;
-  font-weight: 500;
-}
-
-.aksrt-user-home .user-home-stats__item strong {
-  color: var(--color-ink);
-  font-size: 14px;
-}
-
-.aksrt-user-home .uc-header__actions {
-  display: flex;
-  flex-wrap: wrap;
-  justify-content: flex-end;
-  gap: 10px;
-}
-
-.aksrt-user-home .aksrt-user-home__follow-btn {
-  display: inline-flex;
-  align-items: center;
-  gap: 8px;
-}
-
-.aksrt-user-home .aksrt-user-home__follow-btn[aria-disabled="true"] {
-  opacity: 0.72;
-  cursor: not-allowed;
-}
 
 .aksrt-user-home .aksrt-user-home__contacts .profile-social-links {
   display: flex;
@@ -611,9 +559,6 @@
 
 /* ==================== 响应式 ==================== */
 @media (max-width: 640px) {
-  .aksrt-user-home .user-home-stats {
-    gap: 8px;
-  }
 
   .aksrt-user-home .dashboard--public {
     padding: 16px;