feat: use xpier media library for uploads and markdown embeds

Store media:ID in article bodies instead of CDN URLs, and keep sablog attach tokens as a fallback.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Providers/Filament/AdminPanelProvider.php

@@ -26,6 +26,7 @@ use Illuminate\Session\Middleware\StartSession;
 use Illuminate\Support\Facades\Blade;
 use Illuminate\Support\Facades\Schema;
 use Illuminate\View\Middleware\ShareErrorsFromSession;
+use Xpier\FilamentMediaLibrary\Filament\MediaLibraryPlugin;
 
 class AdminPanelProvider extends PanelProvider
 {
@@ -58,6 +59,10 @@ class AdminPanelProvider extends PanelProvider
             ->widgets([
                 AccountWidget::class,
             ])
+            ->plugins([
+                MediaLibraryPlugin::make()
+                    ->navigationGroup((string) (__('admin.groups.content') ?: '内容')),
+            ])
             ->renderHook(
                 PanelsRenderHook::GLOBAL_SEARCH_AFTER,
                 fn (): string => Blade::render('@livewire(\'admin.clear-cache-button\')'),