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/sebastian/code-unit-reverse-lookup/README.md

@@ -0,0 +1,21 @@
+[![Latest Stable Version](https://poser.pugx.org/sebastian/code-unit-reverse-lookup/v/stable.png)](https://packagist.org/packages/sebastian/code-unit-reverse-lookup)
+[![CI Status](https://github.com/sebastianbergmann/code-unit-reverse-lookup/workflows/CI/badge.svg)](https://github.com/sebastianbergmann/code-unit-reverse-lookup/actions)
+[![codecov](https://codecov.io/gh/sebastianbergmann/code-unit-reverse-lookup/branch/main/graph/badge.svg)](https://codecov.io/gh/sebastianbergmann/code-unit-reverse-lookup)
+
+# sebastian/code-unit-reverse-lookup
+
+Looks up which function or method a line of code belongs to.
+
+## Installation
+
+You can add this library as a local, per-project dependency to your project using [Composer](https://getcomposer.org/):
+
+```
+composer require sebastian/code-unit-reverse-lookup
+```
+
+If you only need this library during development, for instance to run your project's test suite, then you should add it as a development-time dependency:
+
+```
+composer require --dev sebastian/code-unit-reverse-lookup
+```