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

resources/views/filament/hooks/topbar-tools.blade.php

@@ -31,4 +31,6 @@
     >
         写文章
     </x-filament::button>
+
+    <livewire:legacy-sync-button />
 </div>

resources/views/filament/pages/page-cache.blade.php

@@ -31,7 +31,9 @@
                     <thead>
                         <tr class="border-b border-gray-200 text-left dark:border-white/10">
                             <th class="py-2 pr-4 font-medium">地址</th>
+                            <th class="py-2 pr-4 font-medium">大小</th>
                             <th class="py-2 pr-4 font-medium">缓存时间</th>
+                            <th class="py-2 pr-4 font-medium">过期时间</th>
                             <th class="py-2 font-medium">操作</th>
                         </tr>
                     </thead>
@@ -43,7 +45,9 @@
                                         {{ $entry['url'] }}
                                     </a>
                                 </td>
+                                <td class="py-2 pr-4 whitespace-nowrap">{{ $entry['size'] ? number_format($entry['size'] / 1024, 1).' KB' : '—' }}</td>
                                 <td class="py-2 pr-4 whitespace-nowrap">{{ $entry['cached_at'] ?: '—' }}</td>
+                                <td class="py-2 pr-4 whitespace-nowrap">{{ $entry['expires_at'] ?: '—' }}</td>
                                 <td class="py-2">
                                     <x-filament::button
                                         size="xs"
@@ -58,6 +62,10 @@
                         @endforeach
                     </tbody>
                 </table>
+                <p class="mt-3 text-xs text-gray-500 dark:text-gray-400">
+                    共 {{ count($this->entries) }} 条，合计 {{ number_format(collect($this->entries)->sum('size') / 1024 / 1024, 2) }} MB。
+                    缓存说明：只缓存未登录访客 GET 的 200 页面；登录用户、评论提交等动态请求不缓存；浏览量统计不受影响。
+                </p>
             </div>
         @endif
     </x-filament::section>