feat: Divi tab with REST check, release and withdrawal

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

tests/Unit/Admin/SettingsPageTest.php

@@ -158,4 +158,31 @@ final class SettingsPageTest extends TestCase
 
         $page->register();
     }
+
+    /** @dataProvider diviNotices */
+    public function testDiviNoticesAreShown(string $key, string $class, string $text): void
+    {
+        Functions\when('current_user_can')->justReturn(true);
+        $_GET['lit_mcp_notice'] = $key;
+
+        ob_start();
+        (new SettingsPage([$this->tab('verbindung', 'Verbindung')]))->render();
+        $html = (string) ob_get_clean();
+
+        self::assertStringContainsString('notice-' . $class, $html);
+        self::assertStringContainsString($text, $html);
+    }
+
+    /** @return list<list<string>> */
+    public static function diviNotices(): array
+    {
+        return [
+            ['divi_checked', 'success', 'Divi-Prüfung abgeschlossen'],
+            ['divi_check_running', 'warning', 'bereits eine Divi-Prüfung'],
+            ['divi_released', 'success', 'für LIT MCP freigegeben'],
+            ['divi_release_refused', 'error', 'Prüfung erneut ausführen'],
+            ['divi_withdrawn', 'success', 'Freigabe zurückgezogen'],
+            ['divi_withdraw_failed', 'error', 'keine Freigabe'],
+        ];
+    }
 }