Serve recent stages from SQLite with configurable background refresh

frontend/app/admin/SettingsPage.tsx

@@ -82,6 +82,7 @@ const NUMBER_SETTINGS = new Set([
   'log_file_backup_count',
   'requests_sync_ttl_minutes',
   'requests_poll_interval_seconds',
+  'requests_stage_refresh_minutes',
   'requests_delta_sync_interval_minutes',
   'requests_cleanup_days',
   'issue_confirmation_contact_attempts',
@@ -386,7 +387,7 @@ const STANDARD_SECTION_GROUPS: Record<
       key: 'requests-advanced',
       title: 'Advanced scheduling',
       description: 'How frequently the background worker checks whether a full refresh is due.',
-      keys: ['requests_poll_interval_seconds'],
+      keys: ['requests_poll_interval_seconds', 'requests_stage_refresh_minutes'],
     },
     {
       key: 'requests-sync',
@@ -505,6 +506,7 @@ const SETTING_LABEL_OVERRIDES: Record<string, string> = {
   qbittorrent_username: 'Web UI username',
   qbittorrent_password: 'Web UI password',
   requests_sync_ttl_minutes: 'Request cache freshness (minutes)',
+  requests_stage_refresh_minutes: 'Local stage refresh (minutes)',
   requests_poll_interval_seconds: 'Full-sync eligibility check (seconds)',
   requests_delta_sync_interval_minutes: 'Recent-change sync interval (minutes)',
   requests_full_sync_time: 'Daily full-sync time',
@@ -1027,6 +1029,7 @@ export default function SettingsPage({ section }: SettingsPageProps) {
       'qBittorrent server URL for download status (FQDN or IP). Scheme is optional.',
     qbittorrent_username: 'qBittorrent login username.',
     qbittorrent_password: 'qBittorrent login password.',
+    requests_stage_refresh_minutes: 'Refresh saved request stages in the background. Default: 15 minutes; range: 1 to 1440. Shorter intervals increase Jellyfin traffic and server load. Recent requests always load from the local database.',
     requests_sync_ttl_minutes: 'How long saved requests stay fresh before a refresh is needed.',
     requests_poll_interval_seconds:
       'How often Magent checks if a full refresh should run.',