refactor(compat): Capability-Interface, DiviFeature implementiert es

Grundlage der generischen Kompatibilitätsschicht für Fremd-Plugins mit inoffiziellen Schnittstellen (Plan docs/superpowers/plans/2026-11-06-kompatibilitaetsschicht.md).

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

src/Compatibility/Capability.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LIT\MCP\Compatibility;
+
+defined('ABSPATH') || exit;
+
+/**
+ * One capability of an integration that a third-party plugin update may break separately. id() is unique across all
+ * integrations, so a bare ID is enough to find its capability.
+ */
+interface Capability
+{
+    /** Stable, globally unique ID such as 'page-read' or 'pods-field-write'. */
+    public function id(): string;
+
+    /** Name for messages and the admin tab (German). */
+    public function label(): string;
+
+    /** Whether the capability changes data. */
+    public function isWrite(): bool;
+}

src/Integrations/Divi/Release/DiviFeature.php

@@ -4,6 +4,8 @@ declare(strict_types=1);
 
 namespace LIT\MCP\Integrations\Divi\Release;
 
+use LIT\MCP\Compatibility\Capability;
+
 defined('ABSPATH') || exit;
 
 // The installed PHPCompatibility sniffs predate enums (PHP 8.1) and read their methods as plain functions.
@@ -13,7 +15,7 @@ defined('ABSPATH') || exit;
  * What the plugin can do with Divi, as far as a Divi update may break it separately: every manifest entry (call,
  * mirror, constant) belongs to one or more features, and the release gate decides per feature.
  */
-enum DiviFeature: string
+enum DiviFeature: string implements Capability
 {
     case PageRead = 'page-read';
     case PageWrite = 'page-write';
@@ -32,6 +34,11 @@ enum DiviFeature: string
     case ThemeBuilderRead = 'tb-read';
     case ThemeBuilderWrite = 'tb-write';
 
+    public function id(): string
+    {
+        return $this->value;
+    }
+
     /** Whether the feature changes data (the seven *Write cases and FontUpload). */
     public function isWrite(): bool
     {