Enhance ticket management with control panel and support role integration

- Introduced a control panel for ticket interactions, allowing users to claim, close, and manage ticket participants via buttons and user select menus.
- Implemented support role member caching to efficiently add staff to private ticket threads, adhering to Discord's rate limits.
- Updated ticket opening messages to mention support roles, ensuring staff are notified when a ticket is created.
- Enhanced localization for new ticket control features in both English and German.
- Documented changes in phase tracking to reflect the new ticket support functionalities.

docs/PHASE-TRACKING.md

@@ -500,6 +500,22 @@
 - [ ] Kategorie ändern/löschen → Panel-Buttons aktualisieren sich
 - [ ] Panel-Kanal wechseln → altes Panel weg, neues im Zielkanal
 
+## Post-Phase – Ticket Support-Ping + Control-Panel (Status: implementiert)
+
+### Abgeschlossen (Code)
+
+- Support-Rollen: Member-Cache nachladen (`guild.members.fetch`), bis 50 Staff in Private Threads adden
+- Ticket-Eröffnung pingt Support-Rollen (`allowedMentions.roles`)
+- Control-Panel im Ticket: Claim, Close, User-Select Add/Remove (wie TempVoice-Pattern)
+- Opener darf schließen; Claim/Add/Remove nur Support-Staff
+
+### Manuell testen
+
+- [ ] Ticket öffnen (Thread) → Support-Rolle wird gepingt, Staff erscheinen im Thread
+- [ ] Ticket öffnen (Channel) → Support-Rolle gepingt, Rolle hat Kanal-Zugriff
+- [ ] Control-Panel: Claim / Close / User hinzufügen / entfernen
+- [ ] Opener kann schließen; Nicht-Staff kann nicht claimen
+
 ## Post-Phase – Ban/Kick-Reason Logging + Verification Fail Event (Status: implementiert)
 
 ### Abgeschlossen (Code)