feat: use xpier media library for uploads and markdown embeds

Store media:ID in post 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

@@ -28,6 +28,7 @@ use Illuminate\Foundation\Http\Middleware\VerifyCsrfToken;
 use Illuminate\Routing\Middleware\SubstituteBindings;
 use Illuminate\Session\Middleware\StartSession;
 use Illuminate\View\Middleware\ShareErrorsFromSession;
+use Xpier\FilamentMediaLibrary\Filament\MediaLibraryPlugin;
 
 class AdminPanelProvider extends PanelProvider
 {
@@ -98,6 +99,10 @@ class AdminPanelProvider extends PanelProvider
             ->widgets([
                 AccountWidget::class,
             ])
+            ->plugins([
+                MediaLibraryPlugin::make()
+                    ->navigationGroup((string) config('filament-media-library.navigation_group', '内容')),
+            ])
             ->middleware([
                 EncryptCookies::class,
                 AddQueuedCookiesToResponse::class,