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/lib/owner-presence.ts

@@ -0,0 +1,67 @@
+import {
+  BotPresenceConfigPatchSchema,
+  BotPresenceConfigSchema,
+  PRESENCE_REDIS_KEY,
+  type BotPresenceConfig
+} from '@nexumi/shared';
+import { prisma } from './prisma';
+import { redis } from './redis';
+
+function mapRow(row: {
+  status: string;
+  activityType: string;
+  activityText: string;
+  rotatingMessages: unknown;
+  maintenanceMode: boolean;
+  maintenanceMessage: string | null;
+}): BotPresenceConfig {
+  const rotating = Array.isArray(row.rotatingMessages)
+    ? row.rotatingMessages.filter((item): item is string => typeof item === 'string')
+    : [];
+  return BotPresenceConfigSchema.parse({
+    status: row.status,
+    activityType: row.activityType,
+    activityText: row.activityText,
+    rotatingMessages: rotating,
+    maintenanceMode: row.maintenanceMode,
+    maintenanceMessage: row.maintenanceMessage
+  });
+}
+
+export async function getPresenceConfig(): Promise<BotPresenceConfig> {
+  const row = await prisma.botPresenceConfig.upsert({
+    where: { id: 'singleton' },
+    create: { id: 'singleton' },
+    update: {}
+  });
+  return mapRow(row);
+}
+
+export async function updatePresenceConfig(patch: unknown): Promise<BotPresenceConfig> {
+  const data = BotPresenceConfigPatchSchema.parse(patch);
+  const current = await getPresenceConfig();
+  const next = { ...current, ...data };
+  const row = await prisma.botPresenceConfig.upsert({
+    where: { id: 'singleton' },
+    create: {
+      id: 'singleton',
+      status: next.status,
+      activityType: next.activityType,
+      activityText: next.activityText,
+      rotatingMessages: next.rotatingMessages,
+      maintenanceMode: next.maintenanceMode,
+      maintenanceMessage: next.maintenanceMessage
+    },
+    update: {
+      status: next.status,
+      activityType: next.activityType,
+      activityText: next.activityText,
+      rotatingMessages: next.rotatingMessages,
+      maintenanceMode: next.maintenanceMode,
+      maintenanceMessage: next.maintenanceMessage
+    }
+  });
+  const mapped = mapRow(row);
+  await redis.set(PRESENCE_REDIS_KEY, JSON.stringify(mapped));
+  return mapped;
+}