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>

themes/sablog/views/index.blade.php

@@ -12,6 +12,7 @@
     @endif
 
     @include('partials.view-mode-switcher')
+    @include('partials.theme-inject', ['point' => 'content_top'])
 
     @forelse($posts as $post)
         @include('partials.post-card', ['post' => $post])
@@ -20,6 +21,7 @@
     @endforelse
 
     @include('partials.pagination', ['paginator' => $posts])
+    @include('partials.theme-inject', ['point' => 'content_bottom'])
 </main>
 @include('partials.sidebar')
 </div>{{-- #page --}}