fix: restyle pager chips and restore theme ad slots

Replace the loose page-count label with a SaBlog-style 6 / 316 chip, wire inject/stylevar HTML into list and post views, and flush page cache when ads are saved.

Co-authored-by: Cursor <cursoragent@cursor.com>

resources/views/partials/sidebar.blade.php

@@ -1,5 +1,5 @@
 <aside class="sidebar">
-    @stack('theme:sidebar_top')
+    @include('partials.theme-inject', ['point' => 'sidebar_top'])
     <section class="widget">
         <h3 class="widget-title">分类</h3>
         <ul class="widget-list">
@@ -84,5 +84,5 @@
             <li>标签：{{ $blogStats['tags'] }} 个</li>
         </ul>
     </section>
-@stack('theme:sidebar_bottom')
-

+    @include('partials.theme-inject', ['point' => 'sidebar_bottom'])
+</aside>