feat: add Apprise sidecar user/admin notifications

frontend/app/admin/SettingsPage.tsx

@@ -27,6 +27,7 @@ const SECTION_LABELS: Record<string, string> = {
   radarr: 'Radarr',
   prowlarr: 'Prowlarr',
   qbittorrent: 'qBittorrent',
+  apprise: 'Apprise',
   log: 'Activity log',
   requests: 'Request sync',
   site: 'Site',
@@ -42,6 +43,7 @@ const URL_SETTINGS = new Set([
   'radarr_base_url',
   'prowlarr_base_url',
   'qbittorrent_base_url',
+  'apprise_base_url',
 ])
 const BANNER_TONES = ['info', 'warning', 'error', 'maintenance']
 
@@ -54,6 +56,7 @@ const SECTION_DESCRIPTIONS: Record<string, string> = {
   radarr: 'Movie automation settings.',
   prowlarr: 'Indexer search settings.',
   qbittorrent: 'Downloader connection settings.',
+  apprise: 'Configure the external Apprise sidecar used for notifications.',
   requests: 'Control how often requests are refreshed and cleaned up.',
   log: 'Activity log for troubleshooting.',
   site: 'Sitewide banner, version, and changelog details.',
@@ -67,6 +70,7 @@ const SETTINGS_SECTION_MAP: Record<string, string | null> = {
   radarr: 'radarr',
   prowlarr: 'prowlarr',
   qbittorrent: 'qbittorrent',
+  apprise: 'apprise',
   requests: 'requests',
   cache: null,
   logs: 'log',
@@ -366,6 +370,10 @@ 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.',
+    apprise_base_url:
+      'External Apprise API base URL for notifications (for example http://apprise:8000).',
+    apprise_api_key:
+      'Optional API key Magent uses when calling your external Apprise service.',
     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.',
@@ -393,6 +401,7 @@ export default function SettingsPage({ section }: SettingsPageProps) {
     radarr_base_url: 'https://radarr.example.com or 10.30.1.81:7878',
     prowlarr_base_url: 'https://prowlarr.example.com or 10.30.1.81:9696',
     qbittorrent_base_url: 'https://qb.example.com or 10.30.1.81:8080',
+    apprise_base_url: 'http://apprise:8000 or https://notify.example.com',
   }
 
   const buildSelectOptions = (