feat: enhance certificate management with expiring status

- Update isInUse function to handle certificates without an ID.
- Modify isDeletable function to include 'expiring' status as deletable.
- Adjust CertificateList component to reflect changes in deletable logic.
- Update BulkDeleteCertificateDialog and DeleteCertificateDialog to handle expiring certificates.
- Add tests for expiring certificates in CertificateList and BulkDeleteCertificateDialog.
- Update translations for expiring certificates in multiple languages.

frontend/src/components/dialogs/BulkDeleteCertificateDialog.tsx

@@ -25,6 +25,7 @@ function providerLabel(cert: Certificate): string {
   if (cert.provider === 'letsencrypt-staging') return 'Staging'
   if (cert.provider === 'custom') return 'Custom'
   if (cert.status === 'expired') return 'Expired LE'
+  if (cert.status === 'expiring') return 'Expiring LE'
   return cert.provider
 }
 

frontend/src/components/dialogs/DeleteCertificateDialog.tsx

@@ -23,6 +23,7 @@ interface DeleteCertificateDialogProps {
 
 function getWarningKey(cert: Certificate): string {
   if (cert.status === 'expired') return 'certificates.deleteConfirmExpired'
+  if (cert.status === 'expiring') return 'certificates.deleteConfirmExpiring'
   if (cert.provider === 'letsencrypt-staging') return 'certificates.deleteConfirmStaging'
   return 'certificates.deleteConfirmCustom'
 }

frontend/src/components/dialogs/__tests__/BulkDeleteCertificateDialog.test.tsx

@@ -126,4 +126,18 @@ describe('BulkDeleteCertificateDialog', () => {
     )
     expect(container.innerHTML).toBe('')
   })
+
+  it('renders "Expiring LE" label for a letsencrypt cert with status expiring', () => {
+    const expiringCert = makeCert({ id: 4, name: 'Expiring Cert', domain: 'expiring.example.com', provider: 'letsencrypt', status: 'expiring' })
+    render(
+      <BulkDeleteCertificateDialog
+        certificates={[expiringCert]}
+        open={true}
+        onConfirm={vi.fn()}
+        onCancel={vi.fn()}
+        isDeleting={false}
+      />
+    )
+    expect(screen.getByText('Expiring LE')).toBeInTheDocument()
+  })
 })