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/psr/http-client/CHANGELOG.md

@@ -0,0 +1,31 @@
+# Changelog
+
+All notable changes to this project will be documented in this file, in reverse chronological order by release.
+
+## 1.0.3
+
+Add `source` link in composer.json. No code changes.
+
+## 1.0.2
+
+Allow PSR-7 (psr/http-message) 2.0. No code changes.
+
+## 1.0.1
+
+Allow installation with PHP 8. No code changes.
+
+## 1.0.0
+
+First stable release. No changes since 0.3.0.
+
+## 0.3.0
+
+Added Interface suffix on exceptions
+ 
+## 0.2.0 
+
+All exceptions are in `Psr\Http\Client` namespace
+
+## 0.1.0
+
+First release