fix: Preset-Änderungen ohne unfiltered_html ablehnen, wenn Divi HTML/CSS anderer Presets entfernen würde

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/Integrations/Divi/Design/DiviDesignRestoreAbility.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace LIT\MCP\Integrations\Divi\Design;
 
+use Closure;
 use LIT\MCP\Abilities\Ability;
 use LIT\MCP\Abilities\Annotations;
 use LIT\MCP\Abilities\Errors;
@@ -20,11 +21,17 @@ final class DiviDesignRestoreAbility implements Ability
 {
     private const ID = '/^(colors|variables|presets|theme_options)-\d{8}T\d{6}Z-[0-9a-f]{6}$/D';
 
+    private const MARKUP = 'Der Snapshot oder der aktuelle Bestand enthält Presets mit HTML/CSS, das beim Speichern '
+        . 'ohne das Recht unfiltered_html verloren ginge; nichts wurde gespeichert.';
+
+    /** @param (Closure(): bool)|null $unfiltered Whether the user may save unfiltered HTML (DesignRights). */
     public function __construct(
         private DesignSystemWriter $writer,
         private DesignChange $change,
-        private SnapshotStore $snapshots
+        private SnapshotStore $snapshots,
+        private ?Closure $unfiltered = null
     ) {
+        $this->unfiltered ??= DesignRights::unfilteredHtml();
     }
 
     public function name(): string
@@ -101,13 +108,23 @@ final class DiviDesignRestoreAbility implements Ability
             );
         }
 
+        $unfiltered = $this->unfiltered;
+
         return $this->change->run(
             $this->name(),
             new PresetArea($this->writer),
             $input,
-            static function (array $raw) use ($snapshot, $id): DesignPlan {
+            static function (array $raw) use ($snapshot, $id, $unfiltered): DesignPlan|WP_Error {
                 $before = PresetBook::fromDivi($raw);
                 $after = PresetBook::fromDivi($snapshot['data']);
+                $refusal = DesignRights::markup(
+                    $unfiltered,
+                    array_merge($before->markupOutside([]), $after->markupOutside([])),
+                    self::MARKUP
+                );
+                if ($refusal !== null) {
+                    return $refusal;
+                }
                 $diff = PresetDiff::between($before, $after);
 
                 return new DesignPlan(