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/PageCacheMiddleware.php

@@ -41,11 +41,12 @@ class PageCacheMiddleware
         $response = $next($request);
 
         if ($response->getStatusCode() === 200) {
+            $body = $response->getContent();
             Cache::put($key, [
-                'body' => $response->getContent(),
+                'body' => $body,
                 'type' => $response->headers->get('Content-Type') ?: 'text/html; charset=utf-8',
             ], $ttl);
-            self::rememberKey($key, $request->fullUrl());
+            self::rememberKey($key, $request->fullUrl(), strlen($body), $ttl);
         }
 
         return $response;
@@ -89,7 +90,7 @@ class PageCacheMiddleware
     }
 
     /**
-     * @return list<array{key: string, url: string, cached_at: string}>
+     * @return list<array{key: string, url: string, cached_at: string, size: int, expires_at: string}>
      */
     public static function entries(): array
     {
@@ -100,6 +101,8 @@ class PageCacheMiddleware
                 'key' => (string) $key,
                 'url' => is_array($meta) ? (string) ($meta['url'] ?? $key) : (string) $key,
                 'cached_at' => is_array($meta) ? (string) ($meta['cached_at'] ?? '') : '',
+                'size' => is_array($meta) ? (int) ($meta['size'] ?? 0) : 0,
+                'expires_at' => is_array($meta) ? (string) ($meta['expires_at'] ?? '') : '',
             ];
         }
 
@@ -122,7 +125,7 @@ class PageCacheMiddleware
         Cache::put($key, (int) Cache::get($key, 0) + 1, now()->addDay());
     }
 
-    private static function rememberKey(string $key, ?string $url = null): void
+    private static function rememberKey(string $key, ?string $url = null, int $size = 0, int $ttl = 0): void
     {
         $keys = (array) Cache::get(self::TAG.'_keys', []);
         $previous = $keys[$key] ?? [];
@@ -130,6 +133,8 @@ class PageCacheMiddleware
         $keys[$key] = [
             'url' => $url ?: (is_array($previous) ? (string) ($previous['url'] ?? '') : ''),
             'cached_at' => now()->toDateTimeString(),
+            'size' => $size,
+            'expires_at' => $ttl > 0 ? now()->addSeconds($ttl)->toDateTimeString() : '',
         ];
 
         Cache::put(self::TAG.'_keys', $keys, now()->addDay());