feat(notifications): dedicate AI Failure Detection notification event (#1794)

Split Obico failure-detection dispatch out of the multiplexed
  on_printer_error event onto its own on_ai_failure_detection event so
  users can subscribe to AI alerts without also enabling HMS hardware-
  error pages, and so the discoverable label "AI Failure Detection" is
  what subscribes them rather than the unrelated "Printer Error" toggle.

  New column on notification_providers (default False, branched
  SQLite/Postgres migration), new notification_service.on_ai_failure_detection
  method, new ai_failure_detection template, obico_actions._notify swap.
  Frontend gets a summary badge, a toggle row with description, and ntfy
  priority surfacing. 14 new tests pin the routing + the regression guard
  ("Printer Error" alone must NOT receive AI notifications now). 11 locales
  covered.

  Existing providers keep working: HMS hardware errors continue to ride
  on_printer_error unchanged; users who want spaghetti alerts opt in via
  the new toggle.

frontend/src/__tests__/components/AddNotificationModal.test.tsx

@@ -40,6 +40,7 @@ function buildProvider(overrides: Partial<NotificationProvider> = {}): Notificat
     on_print_missing_spool_assignment: false,
     on_printer_offline: false,
     on_printer_error: false,
+    on_ai_failure_detection: false,
     on_filament_low: false,
     on_maintenance_due: false,
     on_ams_humidity_high: false,
@@ -336,3 +337,52 @@ describe('AddNotificationModal — stock alert toggles', () => {
     void user; // referenced to avoid unused-var lint warning
   });
 });
+
+describe('AddNotificationModal — AI Failure Detection toggle (#1794)', () => {
+  it('renders the toggle in the Printer Status section', async () => {
+    render(<AddNotificationModal provider={buildProvider()} onClose={() => undefined} />);
+
+    expect(await screen.findByText('AI Failure Detection')).toBeInTheDocument();
+  });
+
+  it('persists on_ai_failure_detection on save (and does NOT touch on_printer_error)', async () => {
+    let captured: Record<string, unknown> | null = null;
+    server.use(
+      http.patch('*/api/v1/notifications/1', async ({ request }) => {
+        captured = (await request.json()) as Record<string, unknown>;
+        return HttpResponse.json({ id: 1 });
+      }),
+    );
+
+    const onClose = vi.fn();
+    const user = userEvent.setup();
+    render(<AddNotificationModal provider={buildProvider()} onClose={onClose} />);
+
+    const label = await screen.findByText('AI Failure Detection');
+    const row = label.closest('div.flex')!;
+    const toggle = within(row).getByRole('switch');
+    await user.click(toggle);
+
+    await user.click(screen.getByRole('button', { name: /^save$/i }));
+    await waitFor(() => expect(onClose).toHaveBeenCalled());
+
+    expect(captured).not.toBeNull();
+    expect(captured!.on_ai_failure_detection).toBe(true);
+    // Critical regression guard: don't accidentally flip the legacy multiplexed field.
+    expect(captured!.on_printer_error).toBe(false);
+  });
+
+  it('AI Failure Detection appears in ntfy priority section when enabled', async () => {
+    render(
+      <AddNotificationModal
+        provider={buildProvider({ on_ai_failure_detection: true })}
+        onClose={() => undefined}
+      />,
+    );
+
+    const priorityHeader = await screen.findByText(/ntfy priority/i);
+    const priorityRoot = priorityHeader.closest('div')!;
+
+    expect(within(priorityRoot).getByText('AI Failure Detection')).toBeInTheDocument();
+  });
+});

frontend/src/__tests__/components/NotificationProviderCard.test.tsx

@@ -57,6 +57,7 @@ const createMockProvider = (
   on_print_progress: false,
   on_printer_offline: false,
   on_printer_error: false,
+  on_ai_failure_detection: false,
   on_filament_low: false,
   on_maintenance_due: false,
   on_ams_humidity_high: false,

frontend/src/__tests__/components/NotificationProviderCardAiFailureDetection.test.tsx

@@ -0,0 +1,128 @@
+/**
+ * Tests for the AI Failure Detection toggle on NotificationProviderCard (#1794).
+ *
+ * Before #1794, Obico failure detection rode the multiplexed
+ * on_printer_error toggle so users couldn't subscribe to one without the
+ * other. These tests pin the standalone toggle:
+ *  - Summary badge renders when enabled.
+ *  - The toggle row appears in the expanded settings panel.
+ *  - Flipping the toggle PATCHes the correct field.
+ */
+
+import { describe, it, expect, afterEach, vi } from 'vitest';
+import { screen, waitFor, within } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { http, HttpResponse } from 'msw';
+import { render } from '../utils';
+import { server } from '../mocks/server';
+import { NotificationProviderCard } from '../../components/NotificationProviderCard';
+import type { NotificationProvider } from '../../api/client';
+
+afterEach(() => {
+  server.resetHandlers();
+  vi.restoreAllMocks();
+});
+
+function buildProvider(overrides: Partial<NotificationProvider> = {}): NotificationProvider {
+  return {
+    id: 1,
+    name: 'Test Provider',
+    provider_type: 'ntfy',
+    enabled: true,
+    config: { server: 'https://ntfy.sh', topic: 'bambuddy' },
+    on_print_start: false,
+    on_print_complete: false,
+    on_print_failed: false,
+    on_print_stopped: false,
+    on_print_progress: false,
+    on_print_missing_spool_assignment: false,
+    on_printer_offline: false,
+    on_printer_error: false,
+    on_ai_failure_detection: false,
+    on_filament_low: false,
+    on_maintenance_due: false,
+    on_ams_humidity_high: false,
+    on_ams_temperature_high: false,
+    on_ams_ht_humidity_high: false,
+    on_ams_ht_temperature_high: false,
+    on_plate_not_empty: false,
+    on_bed_cooled: false,
+    on_first_layer_complete: false,
+    on_queue_job_added: false,
+    on_queue_job_assigned: false,
+    on_queue_job_started: false,
+    on_queue_job_waiting: false,
+    on_queue_job_skipped: false,
+    on_queue_job_failed: false,
+    on_queue_completed: false,
+    on_stock_reorder_alert: false,
+    on_stock_break_alert: false,
+    quiet_hours_enabled: false,
+    quiet_hours_start: null,
+    quiet_hours_end: null,
+    daily_digest_enabled: false,
+    daily_digest_time: null,
+    printer_id: null,
+    last_success: null,
+    last_error: null,
+    last_error_at: null,
+    created_at: '2026-06-22T00:00:00Z',
+    updated_at: '2026-06-22T00:00:00Z',
+    ...overrides,
+  };
+}
+
+describe('NotificationProviderCard — AI Failure Detection badge', () => {
+  it('renders the badge when on_ai_failure_detection is true', async () => {
+    render(
+      <NotificationProviderCard
+        provider={buildProvider({ on_ai_failure_detection: true })}
+        onEdit={vi.fn()}
+      />,
+    );
+    expect(await screen.findByText('AI Failure Detection')).toBeInTheDocument();
+  });
+
+  it('omits the badge when on_ai_failure_detection is false', async () => {
+    render(<NotificationProviderCard provider={buildProvider()} onEdit={vi.fn()} />);
+    await screen.findByText('Test Provider');
+    expect(screen.queryByText('AI Failure Detection')).not.toBeInTheDocument();
+  });
+});
+
+describe('NotificationProviderCard — AI Failure Detection toggle', () => {
+  it('renders the toggle in the expanded settings panel', async () => {
+    const user = userEvent.setup();
+    render(<NotificationProviderCard provider={buildProvider()} onEdit={vi.fn()} />);
+
+    await user.click(await screen.findByText(/event settings/i));
+
+    expect(await screen.findByText('AI Failure Detection')).toBeInTheDocument();
+  });
+
+  it('PATCHes on_ai_failure_detection (NOT on_printer_error) when toggled on — #1794 regression guard', async () => {
+    let captured: Record<string, unknown> | null = null;
+    server.use(
+      http.patch('*/api/v1/notifications/1', async ({ request }) => {
+        captured = (await request.json()) as Record<string, unknown>;
+        return HttpResponse.json(buildProvider({ on_ai_failure_detection: true }));
+      }),
+    );
+
+    const user = userEvent.setup();
+    render(<NotificationProviderCard provider={buildProvider()} onEdit={vi.fn()} />);
+
+    await user.click(await screen.findByText(/event settings/i));
+
+    // The toggle label "AI Failure Detection" is unique to this row.
+    const label = await screen.findByText('AI Failure Detection');
+    const row = label.closest('div.flex')!;
+    const toggle = within(row).getByRole('switch');
+    await user.click(toggle);
+
+    await waitFor(() => expect(captured).not.toBeNull());
+    expect(captured).toMatchObject({ on_ai_failure_detection: true });
+    // Critical: must NOT also flip the legacy multiplexed field.
+    expect(captured).not.toHaveProperty('on_printer_error');
+  });
+});

frontend/src/__tests__/components/NotificationProviderCardStockAlerts.test.tsx

@@ -37,6 +37,7 @@ function buildProvider(overrides: Partial<NotificationProvider> = {}): Notificat
     on_print_missing_spool_assignment: false,
     on_printer_offline: false,
     on_printer_error: false,
+    on_ai_failure_detection: false,
     on_filament_low: false,
     on_maintenance_due: false,
     on_ams_humidity_high: false,

frontend/src/__tests__/mocks/handlers.ts

@@ -50,6 +50,7 @@ const mockNotificationProviders = [
     on_print_progress: false,
     on_printer_offline: false,
     on_printer_error: false,
+    on_ai_failure_detection: false,
     on_filament_low: false,
     on_maintenance_due: false,
     on_ams_humidity_high: false,

frontend/src/api/client.ts

@@ -2172,6 +2172,7 @@ export interface NotificationProvider {
   // Printer status events
   on_printer_offline: boolean;
   on_printer_error: boolean;
+  on_ai_failure_detection: boolean;
   on_filament_low: boolean;
   on_maintenance_due: boolean;
   // AMS environmental alarms (regular AMS)
@@ -2230,6 +2231,7 @@ export interface NotificationProviderCreate {
   // Printer status events
   on_printer_offline?: boolean;
   on_printer_error?: boolean;
+  on_ai_failure_detection?: boolean;
   on_filament_low?: boolean;
   on_maintenance_due?: boolean;
   // AMS environmental alarms (regular AMS)
@@ -2281,6 +2283,7 @@ export interface NotificationProviderUpdate {
   // Printer status events
   on_printer_offline?: boolean;
   on_printer_error?: boolean;
+  on_ai_failure_detection?: boolean;
   on_filament_low?: boolean;
   on_maintenance_due?: boolean;
   // AMS environmental alarms (regular AMS)

frontend/src/components/AddNotificationModal.tsx

@@ -38,6 +38,7 @@ export function AddNotificationModal({ provider, onClose }: AddNotificationModal
   const [onPrintProgress, setOnPrintProgress] = useState(provider?.on_print_progress ?? false);
   const [onPrinterOffline, setOnPrinterOffline] = useState(provider?.on_printer_offline ?? false);
   const [onPrinterError, setOnPrinterError] = useState(provider?.on_printer_error ?? false);
+  const [onAiFailureDetection, setOnAiFailureDetection] = useState(provider?.on_ai_failure_detection ?? false);
   const [onFilamentLow, setOnFilamentLow] = useState(provider?.on_filament_low ?? false);
   const [onMaintenanceDue, setOnMaintenanceDue] = useState(provider?.on_maintenance_due ?? false);
   const [onStockReorderAlert, setOnStockReorderAlert] = useState(provider?.on_stock_reorder_alert ?? false);
@@ -167,6 +168,7 @@ export function AddNotificationModal({ provider, onClose }: AddNotificationModal
       on_print_progress: onPrintProgress,
       on_printer_offline: onPrinterOffline,
       on_printer_error: onPrinterError,
+      on_ai_failure_detection: onAiFailureDetection,
       on_filament_low: onFilamentLow,
       on_maintenance_due: onMaintenanceDue,
       on_stock_reorder_alert: onStockReorderAlert,
@@ -547,6 +549,10 @@ export function AddNotificationModal({ provider, onClose }: AddNotificationModal
                   <span className="text-sm text-white">{t('notifications.error')}</span>
                   <Toggle checked={onPrinterError} onChange={setOnPrinterError} />
                 </div>
+                <div className="flex items-center justify-between">
+                  <span className="text-sm text-white">{t('notifications.aiFailureDetection')}</span>
+                  <Toggle checked={onAiFailureDetection} onChange={setOnAiFailureDetection} />
+                </div>
                 <div className="flex items-center justify-between">
                   <span className="text-sm text-white">{t('notifications.lowFilament')}</span>
                   <Toggle checked={onFilamentLow} onChange={setOnFilamentLow} />
@@ -591,6 +597,7 @@ export function AddNotificationModal({ provider, onClose }: AddNotificationModal
               if (onFirstLayerComplete) enabledEvents.push({ key: 'on_first_layer_complete', label: t('notifications.firstLayerCompleteLabel') });
               if (onPrinterOffline) enabledEvents.push({ key: 'on_printer_offline', label: t('notifications.offline') });
               if (onPrinterError) enabledEvents.push({ key: 'on_printer_error', label: t('notifications.error') });
+              if (onAiFailureDetection) enabledEvents.push({ key: 'on_ai_failure_detection', label: t('notifications.aiFailureDetection') });
               if (onFilamentLow) enabledEvents.push({ key: 'on_filament_low', label: t('notifications.lowFilament') });
               if (onMaintenanceDue) enabledEvents.push({ key: 'on_maintenance_due', label: t('notifications.maintenance') });
               if (onStockReorderAlert) enabledEvents.push({ key: 'on_stock_reorder_alert', label: t('notifications.stockReorderAlert') });

frontend/src/components/NotificationProviderCard.tsx

@@ -138,6 +138,9 @@ export function NotificationProviderCard({ provider, onEdit }: NotificationProvi
             {provider.on_printer_error && (
               <span className="px-2 py-0.5 bg-rose-500/20 text-rose-400 text-xs rounded">{t('notifications.error')}</span>
             )}
+            {provider.on_ai_failure_detection && (
+              <span className="px-2 py-0.5 bg-fuchsia-500/20 text-fuchsia-300 text-xs rounded">{t('notifications.aiFailureDetection')}</span>
+            )}
             {provider.on_filament_low && (
               <span className="px-2 py-0.5 bg-cyan-500/20 text-cyan-400 text-xs rounded">{t('notifications.lowFilament')}</span>
             )}
@@ -366,6 +369,17 @@ export function NotificationProviderCard({ provider, onEdit }: NotificationProvi
                   />
                 </div>
 
+                <div className="flex items-center justify-between">
+                  <div>
+                    <p className="text-sm text-white">{t('notifications.aiFailureDetection')}</p>
+                    <p className="text-xs text-bambu-gray">{t('notifications.aiFailureDetectionDescription')}</p>
+                  </div>
+                  <Toggle
+                    checked={provider.on_ai_failure_detection ?? false}
+                    onChange={(checked) => updateMutation.mutate({ on_ai_failure_detection: checked })}
+                  />
+                </div>
+
                 <div className="flex items-center justify-between">
                   <p className="text-sm text-white">{t('notifications.lowFilamentLabel')}</p>
 <Toggle

frontend/src/i18n/locales/de.ts

@@ -5018,6 +5018,8 @@ export default {
     progressMilestonesDescription: 'Benachrichtigung bei 25%, 50%, 75%',
     printerOffline: 'Drucker offline',
     printerError: 'Druckerfehler',
+    aiFailureDetection: 'KI-Fehlererkennung',
+    aiFailureDetectionDescription: 'Benachrichtigen, wenn die Obico-KI einen möglichen Druckfehler erkennt',
     lowFilamentLabel: 'Filament niedrig',
     maintenanceDue: 'Wartung fällig',
     maintenanceDueDescription: 'Benachrichtigen, wenn Wartung erforderlich ist',

frontend/src/i18n/locales/en.ts

@@ -5043,6 +5043,8 @@ export default {
     progressMilestonesDescription: 'Notify at 25%, 50%, 75%',
     printerOffline: 'Printer Offline',
     printerError: 'Printer Error',
+    aiFailureDetection: 'AI Failure Detection',
+    aiFailureDetectionDescription: 'Notify when Obico AI detects a possible print failure',
     lowFilamentLabel: 'Low Filament',
     maintenanceDue: 'Maintenance Due',
     maintenanceDueDescription: 'Notify when maintenance is needed',

frontend/src/i18n/locales/es.ts

@@ -5027,6 +5027,8 @@ export default {
     progressMilestonesDescription: 'Notificar al 25%, 50% y 75%',
     printerOffline: 'Impresora desconectada',
     printerError: 'Error de la impresora',
+    aiFailureDetection: 'Detección de fallos por IA',
+    aiFailureDetectionDescription: 'Notificar cuando la IA de Obico detecte un posible fallo de impresión',
     lowFilamentLabel: 'Filamento bajo',
     maintenanceDue: 'Mantenimiento pendiente',
     maintenanceDueDescription: 'Notificar cuando se necesite mantenimiento',

frontend/src/i18n/locales/fr.ts

@@ -5008,6 +5008,8 @@ export default {
     progressMilestonesDescription: 'Notifier à 25 %, 50 %, 75 %',
     printerOffline: 'Imprimante hors ligne',
     printerError: 'Erreur de l\'imprimante',
+    aiFailureDetection: 'Détection de défaillance par IA',
+    aiFailureDetectionDescription: 'Notifier lorsque l\'IA Obico détecte une défaillance d\'impression possible',
     lowFilamentLabel: 'Filament bas',
     maintenanceDue: 'Maintenance requise',
     maintenanceDueDescription: 'Notifier lorsqu\'une maintenance est nécessaire',

frontend/src/i18n/locales/it.ts

@@ -5007,6 +5007,8 @@ export default {
     progressMilestonesDescription: 'Notifica al 25%, 50%, 75%',
     printerOffline: 'Stampante offline',
     printerError: 'Errore stampante',
+    aiFailureDetection: 'Rilevamento guasti IA',
+    aiFailureDetectionDescription: 'Notifica quando l\'IA di Obico rileva un possibile guasto di stampa',
     lowFilamentLabel: 'Filamento scarso',
     maintenanceDue: 'Manutenzione necessaria',
     maintenanceDueDescription: 'Notifica quando è necessaria la manutenzione',

frontend/src/i18n/locales/ja.ts

@@ -5019,6 +5019,8 @@ export default {
     progressMilestonesDescription: '25%、50%、75%で通知',
     printerOffline: 'プリンターオフライン',
     printerError: 'プリンターエラー',
+    aiFailureDetection: 'AI 故障検出',
+    aiFailureDetectionDescription: 'Obico AI が印刷の不具合の可能性を検出したときに通知',
     lowFilamentLabel: 'フィラメント残量低下',
     maintenanceDue: 'メンテナンス期限',
     maintenanceDueDescription: 'メンテナンスが必要な場合に通知',

frontend/src/i18n/locales/ko.ts

@@ -4740,6 +4740,8 @@ export default {
     progressMilestonesDescription: '25%, 50%, 75%에서 알림',
     printerOffline: '프린터 오프라인',
     printerError: '프린터 오류',
+    aiFailureDetection: 'AI 실패 감지',
+    aiFailureDetectionDescription: 'Obico AI가 인쇄 실패 가능성을 감지하면 알림',
     lowFilamentLabel: '필라멘트 부족',
     maintenanceDue: '유지 관리 필요',
     maintenanceDueDescription: '유지 관리가 필요할 때 알림',

frontend/src/i18n/locales/pt-BR.ts

@@ -5007,6 +5007,8 @@ export default {
     progressMilestonesDescription: 'Notificar em 25%, 50%, 75%',
     printerOffline: 'Impressora Offline',
     printerError: 'Erro da Impressora',
+    aiFailureDetection: 'Detecção de Falhas por IA',
+    aiFailureDetectionDescription: 'Notificar quando a IA do Obico detectar uma possível falha de impressão',
     lowFilamentLabel: 'Filamento Baixo',
     maintenanceDue: 'Manutenção Necessária',
     maintenanceDueDescription: 'Notificar quando manutenção for necessária',

frontend/src/i18n/locales/tr.ts

@@ -4974,6 +4974,8 @@ export default {
     progressMilestonesDescription: '%25, %50, %75\'te bildir',
     printerOffline: 'Yazıcı Çevrimdışı',
     printerError: 'Yazıcı Hatası',
+    aiFailureDetection: 'AI Hata Tespiti',
+    aiFailureDetectionDescription: 'Obico AI olası bir baskı hatası tespit ettiğinde bildir',
     lowFilamentLabel: 'Az Filament',
     maintenanceDue: 'Bakım Zamanı',
     maintenanceDueDescription: 'Bakım gerektiğinde bildir',

frontend/src/i18n/locales/zh-CN.ts

@@ -5007,6 +5007,8 @@ export default {
     progressMilestonesDescription: '在 25%、50%、75% 时通知',
     printerOffline: '打印机离线',
     printerError: '打印机错误',
+    aiFailureDetection: 'AI 失败检测',
+    aiFailureDetectionDescription: '当 Obico AI 检测到可能的打印失败时通知',
     lowFilamentLabel: '耗材不足',
     maintenanceDue: '需要维护',
     maintenanceDueDescription: '需要维护时通知',

frontend/src/i18n/locales/zh-TW.ts

@@ -5007,6 +5007,8 @@ export default {
     progressMilestonesDescription: '在 25%、50%、75% 時通知',
     printerOffline: '印表機離線',
     printerError: '印表機錯誤',
+    aiFailureDetection: 'AI 失敗偵測',
+    aiFailureDetectionDescription: '當 Obico AI 偵測到可能的列印失敗時通知',
     lowFilamentLabel: '耗材不足',
     maintenanceDue: '需要維護',
     maintenanceDueDescription: '需要維護時通知',