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/symfony/error-handler/CHANGELOG.md

@@ -0,0 +1,50 @@
+CHANGELOG
+=========
+
+7.3
+---
+
+ * Add `error:dump` command
+
+7.1
+---
+
+ * Increase log level to "error" at least for all PHP errors
+
+6.4
+---
+
+ * `FlattenExceptionNormalizer` no longer implements `ContextAwareNormalizerInterface`
+
+6.3
+---
+
+ * Display exception properties in the HTML error page
+
+6.1
+---
+
+ * Report overridden `@final` constants and properties
+ * Read environment variable `SYMFONY_IDE` to configure file link format
+
+5.4
+---
+
+ * Make `DebugClassLoader` trigger deprecation notices on missing return types
+ * Add `SYMFONY_PATCH_TYPE_DECLARATIONS='force=2'` mode to `DebugClassLoader` to turn annotations into native return types
+
+5.2.0
+-----
+
+ * added the ability to set `HtmlErrorRenderer::$template` to a custom template to render when not in debug mode.
+
+5.1.0
+-----
+
+ * The `HtmlErrorRenderer` and `SerializerErrorRenderer` add `X-Debug-Exception` and `X-Debug-Exception-File` headers in debug mode.
+
+4.4.0
+-----
+
+ * added the component
+ * added `ErrorHandler::call()` method utility to turn any PHP error into `\ErrorException`