Implement Owner Panel features and maintenance mode handling

- Introduced the Owner Panel with new routes and UI components for managing guilds, user blacklists, feature flags, and bot presence.
- Added maintenance mode functionality to prevent non-owner users from executing commands during maintenance periods.
- Enhanced localization with new keys for Owner Panel features in both English and German.
- Updated job processing to include a presence refresh job, ensuring the bot's status is regularly updated.
- Improved environment configuration to support owner user IDs for access control.

apps/webui/src/messages/de.json

@@ -518,7 +518,97 @@
     "themeDark": "Dunkel",
     "themeLight": "Hell",
     "logout": "Abmelden",
-    "loggingOut": "Meldet ab…"
+    "loggingOut": "Meldet ab…",
+    "ownerPanel": "Owner-Panel"
+  },
+  "owner": {
+    "nav": {
+      "title": "Owner",
+      "backToDashboard": "Zum Dashboard",
+      "overview": "Übersicht",
+      "guilds": "Server",
+      "users": "User-Blacklist",
+      "flags": "Feature-Flags",
+      "presence": "Präsenz",
+      "team": "Team",
+      "jobs": "Jobs",
+      "changelog": "Changelog",
+      "audit": "Audit"
+    },
+    "common": {
+      "empty": "Keine Einträge.",
+      "noteOptional": "Notiz (optional)"
+    },
+    "overview": {
+      "title": "Owner-Übersicht",
+      "subtitle": "Globale Bot-Kennzahlen und letzte Owner-Aktionen.",
+      "guilds": "Server",
+      "blacklistedUsers": "Gesperrte User",
+      "blacklistedGuilds": "Gesperrte Server",
+      "maintenance": "Wartungsmodus",
+      "uptime": "WebUI-Uptime",
+      "recentAudit": "Letzte Owner-Aktivität",
+      "emptyAudit": "Noch keine Owner-Aktionen.",
+      "viewAudit": "Audit öffnen",
+      "changelog": "Changelog",
+      "emptyChangelog": "Noch keine Changelog-Einträge.",
+      "manageChangelog": "Changelog verwalten"
+    },
+    "guilds": {
+      "title": "Server-Verwaltung",
+      "subtitle": "Server suchen, blacklisten oder den Bot entfernen.",
+      "search": "Server-ID suchen…",
+      "blacklisted": "Blacklist",
+      "blacklist": "Blacklisten",
+      "unblacklist": "Blacklist entfernen",
+      "leave": "Server verlassen",
+      "leaveConfirm": "Bot wirklich von diesem Server entfernen?"
+    },
+    "users": {
+      "title": "User-Blacklist",
+      "subtitle": "Global gesperrte Discord-User (Bot ignoriert sie überall).",
+      "userIdPlaceholder": "Discord User-ID"
+    },
+    "flags": {
+      "title": "Feature-Flags",
+      "subtitle": "Module global steuern und Rollouts konfigurieren.",
+      "keyPlaceholder": "Flag-Key (z. B. new.module)",
+      "rollout": "Rollout %"
+    },
+    "presence": {
+      "title": "Bot-Präsenz",
+      "subtitle": "Status, Aktivität und Wartungsmodus.",
+      "status": "Status",
+      "activityType": "Aktivitätstyp",
+      "activityText": "Aktivitätstext",
+      "rotating": "Rotierende Nachrichten (eine pro Zeile)",
+      "maintenanceMode": "Wartungsmodus aktiv",
+      "maintenanceMessage": "Wartungsnachricht"
+    },
+    "team": {
+      "title": "Team",
+      "subtitle": "Weitere Owner/Admins mit abgestuften Rechten.",
+      "bootstrap": "Bootstrap-Owner (OWNER_USER_IDS)",
+      "noBootstrap": "Keine Bootstrap-Owner in OWNER_USER_IDS gesetzt."
+    },
+    "jobs": {
+      "title": "Jobs & Migrationen",
+      "subtitle": "BullMQ-Queues und Prisma-Migrationsstatus.",
+      "queues": "Queues",
+      "migrations": "Migrationen",
+      "retryFailed": "Fehlgeschlagene neu starten"
+    },
+    "changelog": {
+      "title": "Changelog",
+      "subtitle": "Versionshinweise für das Dashboard.",
+      "version": "Version",
+      "titleField": "Titel",
+      "body": "Inhalt"
+    },
+    "audit": {
+      "title": "Owner-Audit",
+      "subtitle": "Alle Owner-Aktionen im globalen Audit-Log."
+    }
   },
   "serverSwitcher": {
     "switchServer": "Server wechseln",