Post work PR #701

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

@@ -198,4 +198,35 @@ describe('VirtualPrinterCard - tailscale toggle', () => {
       expect(multiVirtualPrinterApi.update).toHaveBeenCalledWith(1, { tailscale_disabled: true });
     });
   });
+
+  it('reverts toggle and shows a specific toast when backend rejects enable (tailscale_not_available)', async () => {
+    const user = userEvent.setup();
+    const printer = createMockPrinter({ tailscale_disabled: true });
+    vi.mocked(multiVirtualPrinterApi.update).mockRejectedValueOnce(
+      new Error('tailscale_not_available')
+    );
+
+    render(<VirtualPrinterCard printer={printer} models={models} />);
+
+    await waitFor(() => {
+      expect(screen.getByText('Tailscale integration')).toBeInTheDocument();
+    });
+
+    const title = screen.getByText('Tailscale integration');
+    const section = title.closest('.flex.items-center.justify-between');
+    const toggleButton = section!.querySelector('button') as HTMLButtonElement;
+    // Disabled state → dark-grey background on the track.
+    expect(toggleButton.className).toContain('bg-bambu-dark-tertiary');
+
+    await user.click(toggleButton);
+
+    await waitFor(() => {
+      expect(multiVirtualPrinterApi.update).toHaveBeenCalledWith(1, { tailscale_disabled: false });
+    });
+
+    // After the 409 revert, the toggle goes back to the dark-grey (disabled) state.
+    await waitFor(() => {
+      expect(toggleButton.className).toContain('bg-bambu-dark-tertiary');
+    });
+  });
 });

frontend/src/components/VirtualPrinterCard.tsx

@@ -43,7 +43,7 @@ export function VirtualPrinterCard({ printer, models }: VirtualPrinterCardProps)
   const [localRemoteInterfaceIp, setLocalRemoteInterfaceIp] = useState(printer.remote_interface_ip || '');
   const [localModel, setLocalModel] = useState(printer.model || '');
   const [localAutoDispatch, setLocalAutoDispatch] = useState(printer.auto_dispatch ?? true);
-  const [localTailscaleDisabled, setLocalTailscaleDisabled] = useState(printer.tailscale_disabled ?? false);
+  const [localTailscaleDisabled, setLocalTailscaleDisabled] = useState(printer.tailscale_disabled ?? true);
   const [showAccessCode, setShowAccessCode] = useState(false);
   const [pendingAction, setPendingAction] = useState<string | null>(null);
   const [showDeleteConfirm, setShowDeleteConfirm] = useState(false);
@@ -59,7 +59,7 @@ export function VirtualPrinterCard({ printer, models }: VirtualPrinterCardProps)
       setLocalRemoteInterfaceIp(printer.remote_interface_ip || '');
       setLocalModel(printer.model || '');
       setLocalAutoDispatch(printer.auto_dispatch ?? true);
-      setLocalTailscaleDisabled(printer.tailscale_disabled ?? false);
+      setLocalTailscaleDisabled(printer.tailscale_disabled ?? true);
     }
   }, [printer, pendingAction]);
 
@@ -84,11 +84,18 @@ export function VirtualPrinterCard({ printer, models }: VirtualPrinterCardProps)
       setPendingAction(null);
     },
     onError: (error: Error) => {
-      showToast(error.message || t('virtualPrinter.toast.failedToUpdate'), 'error');
+      // Specific: the backend rejected "enable Tailscale" because the binary isn't installed.
+      // Surface a clear reason instead of the raw error code.
+      if (error.message === 'tailscale_not_available') {
+        showToast(t('virtualPrinter.toast.tailscaleNotAvailable'), 'error');
+      } else {
+        showToast(error.message || t('virtualPrinter.toast.failedToUpdate'), 'error');
+      }
       setLocalEnabled(printer.enabled);
       setLocalMode((printer.mode === 'queue' ? 'review' : printer.mode) as LocalMode);
       setLocalTargetPrinterId(printer.target_printer_id);
       setLocalBindIp(printer.bind_ip || '');
+      setLocalTailscaleDisabled(printer.tailscale_disabled ?? true);
       setPendingAction(null);
     },
   });

frontend/src/i18n/locales/de.ts

@@ -3984,6 +3984,7 @@ export default {
     toast: {
       updated: 'Virtuelle Druckereinstellungen aktualisiert',
       failedToUpdate: 'Einstellungen konnten nicht aktualisiert werden',
+      tailscaleNotAvailable: 'Tailscale ist auf diesem Host nicht installiert. Installiere Tailscale zuerst und versuche es dann erneut.',
       accessCodeRequired: 'Bitte zuerst einen Zugangscode setzen',
       targetPrinterRequired: 'Bitte zuerst einen Zieldrucker auswählen',
       bindIpRequired: 'Bitte zuerst eine Bind-IP setzen',

frontend/src/i18n/locales/en.ts

@@ -3992,6 +3992,7 @@ export default {
     toast: {
       updated: 'Virtual printer settings updated',
       failedToUpdate: 'Failed to update settings',
+      tailscaleNotAvailable: 'Tailscale is not installed on this host. Install Tailscale first, then try again.',
       accessCodeRequired: 'Please set an access code first',
       targetPrinterRequired: 'Please select a target printer first',
       bindIpRequired: 'Please set a bind IP first',

frontend/src/i18n/locales/fr.ts

@@ -3907,6 +3907,7 @@ export default {
     toast: {
       updated: 'Réglages virtuels mis à jour',
       failedToUpdate: 'Échec mise à jour',
+      tailscaleNotAvailable: 'Tailscale n\'est pas installé sur cet hôte. Installez Tailscale puis réessayez.',
       accessCodeRequired: 'Code d\'accès requis',
       targetPrinterRequired: 'Imprimante cible requise',
       bindIpRequired: 'Veuillez d\'abord définir une adresse IP',

frontend/src/i18n/locales/it.ts

@@ -3906,6 +3906,7 @@ export default {
     toast: {
       updated: 'Impostazioni stampante virtuale aggiornate',
       failedToUpdate: 'Aggiornamento impostazioni fallito',
+      tailscaleNotAvailable: 'Tailscale non è installato su questo host. Installa prima Tailscale, poi riprova.',
       accessCodeRequired: 'Imposta prima un codice accesso',
       targetPrinterRequired: 'Seleziona prima una stampante target',
       bindIpRequired: 'Impostare prima un indirizzo IP',

frontend/src/i18n/locales/ja.ts

@@ -3945,6 +3945,7 @@ export default {
     toast: {
       updated: '仮想プリンター設定を更新しました',
       failedToUpdate: '設定の更新に失敗しました',
+      tailscaleNotAvailable: 'このホストにTailscaleがインストールされていません。先にTailscaleをインストールしてから再試行してください。',
       accessCodeRequired: '先にアクセスコードを設定してください',
       targetPrinterRequired: '先にターゲットプリンターを選択してください',
       bindIpRequired: '先にバインドIPを設定してください',

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

@@ -3920,6 +3920,7 @@ export default {
     toast: {
       updated: 'Configurações da impressora virtual atualizadas',
       failedToUpdate: 'Falha ao atualizar as configurações',
+      tailscaleNotAvailable: 'Tailscale não está instalado neste host. Instale o Tailscale primeiro e tente novamente.',
       accessCodeRequired: 'Defina um código de acesso primeiro',
       targetPrinterRequired: 'Selecione uma impressora alvo primeiro',
       bindIpRequired: 'Defina um IP de ligação primeiro',

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

@@ -3972,6 +3972,7 @@ export default {
     toast: {
       updated: '虚拟打印机设置已更新',
       failedToUpdate: '更新设置失败',
+      tailscaleNotAvailable: '此主机上未安装 Tailscale。请先安装 Tailscale，然后重试。',
       accessCodeRequired: '请先设置访问码',
       targetPrinterRequired: '请先选择目标打印机',
       bindIpRequired: '请先设置绑定 IP',

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

@@ -3972,6 +3972,7 @@ export default {
     toast: {
       updated: '虛擬印表機設定已更新',
       failedToUpdate: '更新設定失敗',
+      tailscaleNotAvailable: '此主機上未安裝 Tailscale。請先安裝 Tailscale，然後重試。',
       accessCodeRequired: '請先設定存取碼',
       targetPrinterRequired: '請先選擇目標印表機',
       bindIpRequired: '請先設定繫結 IP',