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/app/owner/jobs/page.tsx

@@ -0,0 +1,30 @@
+import { JobsManager } from '@/components/owner/owner-forms';
+import { getLocale, t } from '@/lib/i18n';
+import { getAllQueueStats } from '@/lib/owner-jobs';
+import { prisma } from '@/lib/prisma';
+
+export default async function OwnerJobsPage() {
+  const locale = await getLocale();
+  const [queues, migrations] = await Promise.all([
+    getAllQueueStats(),
+    prisma.$queryRaw<Array<{ migration_name: string; finished_at: Date | null }>>`
+      SELECT migration_name, finished_at FROM "_prisma_migrations" ORDER BY finished_at DESC NULLS LAST
+    `
+  ]);
+
+  return (
+    <div className="space-y-6">
+      <div>
+        <h1 className="text-2xl font-semibold">{t(locale, 'owner.jobs.title')}</h1>
+        <p className="text-sm text-muted-foreground">{t(locale, 'owner.jobs.subtitle')}</p>
+      </div>
+      <JobsManager
+        initialQueues={queues}
+        initialMigrations={migrations.map((row) => ({
+          name: row.migration_name,
+          finishedAt: row.finished_at?.toISOString() ?? null
+        }))}
+      />
+    </div>
+  );
+}