Stand: SMTP-Test, Admin-Mail-Tab, Notifiable-Fix, Lazy-Quill

- Fix: Notifiable-Trait zum User-Model hinzugefuegt (behebt notify()-500er)
- Installer: SMTP-Verbindungstest mit EsmtpTransport + Ueberspringen-Link
- Admin: Neuer E-Mail-Tab mit SMTP-Konfiguration + Verbindungstest
- Admin: Lazy Quill-Initialisierung (nur sichtbare Locale wird geladen)
- Uebersetzungen: 17 neue Mail-Keys in allen 6 Sprachen

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

vendor/masterminds/html5/composer.json

@@ -0,0 +1,40 @@
+{
+    "name": "masterminds/html5",
+    "description": "An HTML5 parser and serializer.",
+    "type": "library",
+    "homepage": "http://masterminds.github.io/html5-php",
+    "license": "MIT",
+    "keywords": ["xml", "html", "html5", "dom", "parser", "serializer", "querypath"],
+    "authors": [
+        {
+            "name": "Matt Butcher",
+            "email": "technosophos@gmail.com"
+        },
+        {
+            "name": "Matt Farina",
+            "email": "matt@mattfarina.com"
+        },
+        {
+            "name": "Asmir Mustafic",
+            "email": "goetas@gmail.com"
+        }
+    ],
+    "require" : {
+        "ext-dom": "*",
+        "php" : ">=5.3.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit" : "^4.8.35 || ^5.7.21 || ^6 || ^7 || ^8 || ^9"
+    },
+    "autoload": {
+        "psr-4": {"Masterminds\\": "src"}
+    },
+    "autoload-dev": {
+        "psr-4": {"Masterminds\\HTML5\\Tests\\": "test/HTML5"}
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "2.7-dev"
+        }
+    }
+}