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/Filament/Pages/ThemeInject.php

@@ -8,7 +8,6 @@ use App\Blog\Support\ThemeInjector;
 use App\Blog\Support\ThemeManager;
 use App\Models\Setting;
 use Filament\Actions\Action;
-use Filament\Forms\Components\KeyValue;
 use Filament\Forms\Components\Repeater;
 use Filament\Forms\Components\Textarea;
 use Filament\Forms\Components\TextInput;
@@ -38,9 +37,15 @@ class ThemeInject extends Page
 
     public function mount(): void
     {
+        $vars = app(ThemeManager::class)->variables();
+        $varRows = [];
+        foreach ($vars as $key => $value) {
+            $varRows[] = ['key' => (string) $key, 'value' => (string) $value];
+        }
+
         $this->form->fill([
             'inject' => $this->normalizeBlocks(Setting::get('inject.blocks', [])),
-            'theme_vars' => app(ThemeManager::class)->variables(),
+            'theme_vars' => $varRows,
         ]);
     }
 
@@ -80,11 +85,23 @@ class ThemeInject extends Page
 
         $tabs[] = Tab::make('主题变量（stylevar）')
             ->schema([
-                KeyValue::make('theme_vars')
+                Repeater::make('theme_vars')
                     ->label('当前主题变量：视图用 {{ theme(\'var\', \'key\') }} 引用')
-                    ->keyLabel('变量名')
-                    ->valueLabel('内容（HTML）')
+                    ->schema([
+                        TextInput::make('key')
+                            ->label('变量名')
+                            ->required(),
+                        Textarea::make('value')
+                            ->label('内容（HTML）')
+                            ->rows(4),
+                    ])
+                    ->columns(1)
+                    ->defaultItems(0)
+                    ->collapsible()
+                    ->itemLabel(fn (array $state): ?string => $state['key'] ?? null)
                     ->reorderable()
+                    ->reorderableWithButtons()
+                    ->addActionLabel('添加变量')
                     ->columnSpanFull(),
             ]);
 
@@ -118,7 +135,16 @@ class ThemeInject extends Page
         }
 
         Setting::set('inject.blocks', $blocks);
-        Setting::set('theme_vars_'.app(ThemeManager::class)->active(), $data['theme_vars'] ?? []);
+
+        $vars = [];
+        foreach ($data['theme_vars'] ?? [] as $row) {
+            $key = trim((string) ($row['key'] ?? ''));
+            if ($key === '') {
+                continue;
+            }
+            $vars[$key] = (string) ($row['value'] ?? '');
+        }
+        Setting::set('theme_vars_'.app(ThemeManager::class)->active(), $vars);
         \App\Blog\Support\PageCacheMiddleware::flush();
 
         Notification::make()->title('注入内容已保存')->success()->send();