feat: 主题内容注入点系统（10 个标准位置，同位置多条注入块可排序/启停，stylevar 变量复活）+ 后台主题注入管理页（Tab 分区）+ 缓存/设置收进顶部用户下拉菜单（Livewire action 即时通知）

app/Providers/Filament/AdminPanelProvider.php

@@ -44,6 +44,36 @@ class AdminPanelProvider extends PanelProvider
             ->brandName(config('blog.name'))
             ->sidebarWidth('13rem')
             ->maxContentWidth(\Filament\Support\Enums\Width::Full)
+            ->userMenuItems([
+                // 工具：清空缓存（Livewire action，即时通知）
+                \Filament\Actions\Action::make('flush-page-cache')
+                    ->label('清空前台缓存')
+                    ->icon('heroicon-o-bolt')
+                    ->color('warning')
+                    ->action(function (): void {
+                        \App\Blog\Support\PageCacheMiddleware::flush();
+                        \Filament\Notifications\Notification::make()->title('前台页面缓存已清空')->success()->send();
+                    }),
+                \Filament\Actions\Action::make('flush-all-cache')
+                    ->label('清空全部缓存')
+                    ->icon('heroicon-o-trash')
+                    ->color('danger')
+                    ->requiresConfirmation()
+                    ->action(function (): void {
+                        \App\Blog\Support\PageCacheMiddleware::flush();
+                        \App\Models\Setting::flushCache();
+                        \Illuminate\Support\Facades\Cache::flush();
+                        \Filament\Notifications\Notification::make()->title('全部缓存已清空')->success()->send();
+                    }),
+                \Filament\Actions\Action::make('blog-settings')
+                    ->label('博客设置')
+                    ->icon('heroicon-o-cog-6-tooth')
+                    ->url(fn (): string => \App\Filament\Pages\BlogSettings::getUrl()),
+                \Filament\Actions\Action::make('theme-inject')
+                    ->label('主题注入')
+                    ->icon('heroicon-o-squares-plus')
+                    ->url(fn (): string => \App\Filament\Pages\ThemeInject::getUrl()),
+            ])
             ->navigationGroups([
                 NavigationGroup::make('内容'),
                 NavigationGroup::make('管理'),