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>

app/Blog/Support/ThemeInjector.php

@@ -34,6 +34,24 @@ class ThemeInjector
         'body_end' => '页面末尾（</body> 前）',
     ];
 
+    /**
+     * Old SaBlog stylevar names → inject points. Unmapped HTML vars go to footer.
+     *
+     * @var array<string, list<string>>
+     */
+    public const STYLEVAR_POINTS = [
+        'head' => ['ad_head', 'headad'],
+        'header' => ['headerad', 'header_ad', 'ad_header', 'topad', 'ad_top', 'sitead', 'site_ad'],
+        'sidebar_top' => ['sidebarad', 'sidebar_ad', 'ad_sidebar', 'leftad', 'ad_left'],
+        'sidebar_bottom' => ['ad_sidebar_bottom'],
+        'content_top' => ['indexad', 'ad_index', 'contentad', 'ad_content'],
+        'content_bottom' => ['ad_content_bottom'],
+        'post_content_top' => ['ad_post_top', 'insad'],
+        'post_content_bottom' => ['ad_post_bottom'],
+        'footer' => ['footerad', 'footer_ad', 'ad_footer', 'huangjinlian', 'huangjinlian2', 'huangjinlian3'],
+        'body_end' => ['ad_body_end'],
+    ];
+
     /**
      * 读取某一注入点的所有注入块（多条，已排序、已过滤停用），
      * 并把插件追加的 HTML 合并进来。
@@ -51,6 +69,10 @@ class ThemeInjector
             ->values()
             ->all();
 
+        foreach (self::stylevarBlocks($point) as $html) {
+            $blocks[] = $html;
+        }
+
         $extra = (string) app(PluginManager::class)->applyFilters("theme.inject.{$point}", '');
 
         if ($extra !== '') {
@@ -75,4 +97,45 @@ class ThemeInjector
             }
         });
     }
+
+    /**
+     * @return list<string>
+     */
+    private static function stylevarBlocks(string $point): array
+    {
+        $vars = app(ThemeManager::class)->variables();
+        if ($vars === []) {
+            return [];
+        }
+
+        $html = [];
+        foreach (self::STYLEVAR_POINTS[$point] ?? [] as $key) {
+            $value = trim((string) ($vars[$key] ?? ''));
+            if ($value !== '') {
+                $html[] = $value;
+            }
+        }
+
+        if ($point !== 'footer') {
+            return $html;
+        }
+
+        $mapped = [];
+        foreach (self::STYLEVAR_POINTS as $keys) {
+            foreach ($keys as $key) {
+                $mapped[$key] = true;
+            }
+        }
+
+        foreach ($vars as $key => $value) {
+            $value = trim((string) $value);
+            if ($value === '' || isset($mapped[$key]) || ! str_contains($value, '<')) {
+                continue;
+            }
+
+            $html[] = $value;
+        }
+
+        return $html;
+    }
 }