feat: topbar legacy-sync button, card view mode with cover fallback, year/month/day archives, richer page cache admin, stylevar repeater editor

- topbar: Livewire LegacySyncButton next to 写文章 (moved from user menu)
- view modes: add 图文(card) grid with cover fallback chain (cover → attachment → first content image → placeholder); list mode now title-only compact
- archives: year/month/day index grid
- page cache admin: size + expiry columns, total size, cache policy note
- theme inject: stylevars switch from KeyValue to Repeater with multi-line HTML editing
- import: html_entity_decode for category/post-title/link/keywords/comment author

app/Blog/Support/HomeViewMode.php

@@ -15,6 +15,8 @@ class HomeViewMode
 
     public const FULL = 'full';
 
+    public const CARD = 'card';
+
     public const COOKIE = 'll_home_view';
 
     /**
@@ -25,12 +27,13 @@ class HomeViewMode
         return [
             self::LIST => '列表',
             self::FULL => '标准',
+            self::CARD => '图文',
         ];
     }
 
     public static function isValid(mixed $value): bool
     {
-        return is_string($value) && in_array($value, [self::LIST, self::FULL], true);
+        return is_string($value) && in_array($value, [self::LIST, self::FULL, self::CARD], true);
     }
 
     public static function resolve(?Request $request = null): string