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/mime/CHANGELOG.md

@@ -0,0 +1,62 @@
+CHANGELOG
+=========
+
+7.4
+---
+
+ * Deprecate implementing `__sleep/wakeup()` on `AbstractPart` implementations; use `__(un)serialize()` instead
+
+7.0
+---
+
+ * Remove `Email::attachPart()`, use `Email::addPart()` instead
+ * Argument `$body` is now required (at least null) in `Message::setBody()`
+ * Require explicit argument when calling `Message::setBody()`
+
+6.3
+---
+
+ * Support detection of related parts if `Content-Id` is used instead of the name
+ * Add `TextPart::getDisposition()`
+
+6.2
+---
+
+ * Add `File`
+ * Deprecate `Email::attachPart()`, use `addPart()` instead
+ * Deprecate calling `Message::setBody()` without arguments
+
+6.1
+---
+
+ * Add `DataPart::getFilename()` and `DataPart::getContentType()`
+
+6.0
+---
+
+ * Remove `Address::fromString()`, use `Address::create()` instead
+ * Remove `Serializable` interface from `RawMessage`
+
+5.2.0
+-----
+
+ * Add support for DKIM
+ * Deprecated `Address::fromString()`, use `Address::create()` instead
+
+4.4.0
+-----
+
+ * [BC BREAK] Removed `NamedAddress` (`Address` now supports a name)
+ * Added PHPUnit constraints
+ * Added `AbstractPart::asDebugString()`
+ * Added `Address::fromString()`
+
+4.3.3
+-----
+
+ * [BC BREAK] Renamed method `Headers::getAll()` to `Headers::all()`.
+
+4.3.0
+-----
+
+ * Introduced the component as experimental