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/api/owner/team/route.ts

@@ -0,0 +1,77 @@
+import { NextResponse } from 'next/server';
+import { OwnerTeamUpsertSchema } from '@nexumi/shared';
+import { toApiErrorResponse } from '@/lib/auth';
+import { writeOwnerAudit } from '@/lib/owner-audit';
+import { requireOwner } from '@/lib/owner-auth';
+import { env } from '@/lib/env';
+import { prisma } from '@/lib/prisma';
+
+export async function GET() {
+  try {
+    await requireOwner('VIEWER');
+    const members = await prisma.ownerTeamMember.findMany({ orderBy: { createdAt: 'asc' } });
+    return NextResponse.json({
+      bootstrapOwnerIds: env.OWNER_USER_IDS ?? [],
+      members
+    });
+  } catch (error) {
+    return toApiErrorResponse(error);
+  }
+}
+
+export async function PUT(request: Request) {
+  try {
+    const session = await requireOwner('OWNER');
+    const body = OwnerTeamUpsertSchema.parse(await request.json());
+    const before = await prisma.ownerTeamMember.findUnique({ where: { userId: body.userId } });
+    const member = await prisma.ownerTeamMember.upsert({
+      where: { userId: body.userId },
+      create: {
+        userId: body.userId,
+        role: body.role,
+        note: body.note ?? null
+      },
+      update: {
+        role: body.role,
+        note: body.note ?? null
+      }
+    });
+    await writeOwnerAudit(prisma, {
+      actorUserId: session.user.id,
+      action: before ? 'team.update' : 'team.create',
+      targetType: 'OwnerTeamMember',
+      targetId: member.id,
+      before,
+      after: member
+    });
+    return NextResponse.json(member);
+  } catch (error) {
+    return toApiErrorResponse(error);
+  }
+}
+
+export async function DELETE(request: Request) {
+  try {
+    const session = await requireOwner('OWNER');
+    const { searchParams } = new URL(request.url);
+    const userId = searchParams.get('userId');
+    if (!userId) {
+      return NextResponse.json({ error: 'userId required' }, { status: 400 });
+    }
+    const before = await prisma.ownerTeamMember.findUnique({ where: { userId } });
+    if (!before) {
+      return NextResponse.json({ error: 'Not found' }, { status: 404 });
+    }
+    await prisma.ownerTeamMember.delete({ where: { userId } });
+    await writeOwnerAudit(prisma, {
+      actorUserId: session.user.id,
+      action: 'team.delete',
+      targetType: 'OwnerTeamMember',
+      targetId: before.id,
+      before
+    });
+    return NextResponse.json({ ok: true });
+  } catch (error) {
+    return toApiErrorResponse(error);
+  }
+}