fix(user-center): keep page-owned nav left of credits panel

Drop bare .sidebar from the profile aside so site-layout float/hide no
longer stacks stats/assets under content; harden page-owned grid + drawer
selectors on uc-sidebar/page-owned only.

templates/pages/page-profile.php

@@ -68,7 +68,7 @@ get_header();
 				<?php get_template_part('templates/parts/user-center/account-modals', null, ['context' => $render_context]); ?>
 			</div>
 
-			<aside class="content-layout__aside sidebar page-owned uc-sidebar aksrt-profile__aside" role="complementary" aria-label="<?php esc_attr_e('用户中心导航', 'aksrt'); ?>">
+			<aside class="content-layout__aside page-owned uc-sidebar aksrt-profile__aside" role="complementary" aria-label="<?php esc_attr_e('用户中心导航', 'aksrt'); ?>">
 				<?php get_template_part('templates/parts/user-center/sidebar', null, ['context' => $render_context]); ?>
 			</aside>
 		</div>