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/string/CHANGELOG.md

@@ -0,0 +1,66 @@
+CHANGELOG
+=========
+
+8.0
+---
+
+ * Replace `__sleep/wakeup()` by `__(un)serialize()` on string implementations
+
+7.4
+---
+
+ * Deprecate implementing `__sleep/wakeup()` on string implementations
+
+7.3
+---
+
+ * Add the `AbstractString::pascal()` method
+
+7.2
+---
+
+ * Add `TruncateMode` enum to handle more truncate methods
+ * Add the `AbstractString::kebab()` method
+
+7.1
+---
+
+ * Add `localeLower()`, `localeUpper()`, `localeTitle()` methods to `AbstractUnicodeString`
+
+6.2
+---
+
+  * Add support for emoji in `AsciiSlugger`
+
+5.4
+---
+
+ * Add `trimSuffix()` and `trimPrefix()` methods
+
+5.3
+---
+
+ * Made `AsciiSlugger` fallback to parent locale's symbolsMap
+
+5.2.0
+-----
+
+ * added a `FrenchInflector` class
+
+5.1.0
+-----
+
+ * added the `AbstractString::reverse()` method
+ * made `AbstractString::width()` follow POSIX.1-2001
+ * added `LazyString` which provides memoizing stringable objects
+ * The component is not marked as `@experimental` anymore
+ * added the `s()` helper method to get either an `UnicodeString` or `ByteString` instance,
+   depending of the input string UTF-8 compliance
+ * added `$cut` parameter to `Symfony\Component\String\AbstractString::truncate()`
+ * added `AbstractString::containsAny()`
+ * allow passing a string of custom characters to `ByteString::fromRandom()`
+
+5.0.0
+-----
+
+ * added the component as experimental