feat(machine): re-pair UX on bunker deauth at boot

A revoked / TTL-expired / off-policy bunker binding now surfaces a dedicated
"Pairing Required" screen instead of a raw error, and a signer/relay timeout
shows "Signer Unreachable" (transient). Shared classifyInitError() maps the
typed BunkerRejectedError / BunkerTimeoutError (by name, so it survives bundle
boundaries) to maintenance-screen sentinels, used at every store init catch +
the App.vue fallback. App.vue's nested-ternary screen copy refactored to a
keyed map (cleaner, and the new screens drop in).

Scope: boot-time detection (covers the dominant restart-after-revoke case).
Mid-session re-pair detection (flipping the screen when a sign fails during a
live flow) is a deliberate follow-up.

Part of Phase D, aiolabs/bitspire#52.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/machine/src/App.vue

@@ -4,6 +4,7 @@ import { useRoute } from 'vue-router'
 import { useAtmStore } from '@/stores/atm'
 import { useTheme } from '@/composables/useTheme'
 import { setBranding } from '@/composables/useBranding'
+import { classifyInitError } from '@/services/init-error'
 import { Badge } from '@/components/ui/badge'
 import { Button } from '@/components/ui/button'
 import { Sun, Moon } from 'lucide-vue-next'
@@ -20,6 +21,46 @@ function formatSats(sats: number): string {
   return sats.toLocaleString()
 }
 
+/**
+ * Maintenance-screen copy keyed by the `initError` sentinel. Falls back to a
+ * generic out-of-service message (the raw error text shows under debug only).
+ */
+const MAINTENANCE_SCREENS: Record<string, { title: string; message: string }> = {
+  maintenance: {
+    title: 'Under Service',
+    message: 'This machine is currently being serviced. We will be back shortly.',
+  },
+  'awaiting-fees': {
+    title: 'Awaiting Configuration',
+    message:
+      'Awaiting fee configuration from operator. Contact operator to publish initial fee config.',
+  },
+  unpaired: {
+    title: 'Pairing Required',
+    message:
+      'This machine needs to be re-paired by the operator before it can accept transactions.',
+  },
+  'signer-unreachable': {
+    title: 'Signer Unreachable',
+    message: 'Cannot reach the signing service right now. This usually resolves shortly.',
+  },
+}
+
+const GENERIC_SCREEN = {
+  title: 'ATM Unavailable',
+  message:
+    'This machine is temporarily out of service. Please try again later or use another machine.',
+}
+
+const maintenanceScreen = computed(() =>
+  atmStore.initError ? (MAINTENANCE_SCREENS[atmStore.initError] ?? GENERIC_SCREEN) : GENERIC_SCREEN
+)
+
+/** True when the screen is a known sentinel (hide the raw debug error line). */
+const isKnownMaintenanceScreen = computed(
+  () => !!atmStore.initError && atmStore.initError in MAINTENANCE_SCREENS
+)
+
 const formattedBtcPrice = computed(() => {
   if (atmStore.btcPrice === null) return null
   const local = `${atmStore.fiatCode}/BTC: ${atmStore.fiatSymbol}${Math.round(atmStore.btcPrice).toLocaleString()}`
@@ -96,7 +137,7 @@ onMounted(async () => {
     atmStore.startPricePolling()
   } catch (error) {
     console.error('[App] Initialization failed:', error)
-    atmStore.initError = error instanceof Error ? error.message : 'Initialization failed'
+    atmStore.initError = classifyInitError(error)
   }
 })
 
@@ -141,29 +182,13 @@ function toggleLiveServices() {
         <line x1="12" y1="17" x2="12.01" y2="17" />
       </svg>
       <h1 class="text-2xl lg:text-[3.5rem] font-bold">
-        {{
-          atmStore.initError === 'maintenance'
-            ? 'Under Service'
-            : atmStore.initError === 'awaiting-fees'
-              ? 'Awaiting Configuration'
-              : 'ATM Unavailable'
-        }}
+        {{ maintenanceScreen.title }}
       </h1>
       <p class="max-w-md text-center text-base lg:text-2xl text-muted-foreground">
-        {{
-          atmStore.initError === 'maintenance'
-            ? 'This machine is currently being serviced. We will be back shortly.'
-            : atmStore.initError === 'awaiting-fees'
-              ? 'Awaiting fee configuration from operator. Contact operator to publish initial fee config.'
-              : 'This machine is temporarily out of service. Please try again later or use another machine.'
-        }}
+        {{ maintenanceScreen.message }}
       </p>
       <p
-        v-if="
-          atmStore.debugMode &&
-          atmStore.initError !== 'maintenance' &&
-          atmStore.initError !== 'awaiting-fees'
-        "
+        v-if="atmStore.debugMode && !isKnownMaintenanceScreen"
         class="max-w-lg text-center font-mono text-sm text-destructive"
       >
         {{ atmStore.initError }}

apps/machine/src/services/__tests__/init-error.test.ts

@@ -0,0 +1,30 @@
+import { describe, it, expect } from 'vitest'
+import { BunkerRejectedError, BunkerTimeoutError } from '@bitSpire/nostr-client'
+import { classifyInitError } from '../init-error.js'
+
+describe('classifyInitError', () => {
+  it('maps a bunker rejection (revoke / TTL / off-policy) to "unpaired"', () => {
+    expect(classifyInitError(new BunkerRejectedError('revoked'))).toBe('unpaired')
+  })
+
+  it('maps a bunker timeout to "signer-unreachable"', () => {
+    expect(classifyInitError(new BunkerTimeoutError('no response'))).toBe('signer-unreachable')
+  })
+
+  it('classifies by error name across bundle boundaries (no instanceof)', () => {
+    // A structurally-equivalent error from a different module copy still maps.
+    const lookalike = Object.assign(new Error('x'), { name: 'BunkerRejectedError' })
+    expect(classifyInitError(lookalike)).toBe('unpaired')
+  })
+
+  it('surfaces a generic error message unchanged', () => {
+    expect(classifyInitError(new Error('relay down'))).toBe('relay down')
+  })
+
+  it('uses the fallback for non-Error throws', () => {
+    expect(classifyInitError('boom', 'Lightning initialization failed')).toBe(
+      'Lightning initialization failed'
+    )
+    expect(classifyInitError(undefined)).toBe('Initialization failed')
+  })
+})

apps/machine/src/services/init-error.ts

@@ -0,0 +1,17 @@
+/**
+ * Classify an initialization failure into a maintenance-screen sentinel
+ * (see App.vue's MAINTENANCE_SCREENS).
+ *
+ * Bunker failures (aiolabs/bitspire#52) get dedicated screens:
+ * - `BunkerRejectedError` (revoked / TTL-expired / off-policy binding) →
+ *   `unpaired` — the operator must re-pair the machine.
+ * - `BunkerTimeoutError` (signer/relay unreachable) → `signer-unreachable`,
+ *   a transient condition.
+ * Everything else surfaces its raw message (or the caller's fallback).
+ */
+export function classifyInitError(error: unknown, fallback = 'Initialization failed'): string {
+  const name = (error as { name?: string } | null)?.name
+  if (name === 'BunkerRejectedError') return 'unpaired'
+  if (name === 'BunkerTimeoutError') return 'signer-unreachable'
+  return error instanceof Error ? error.message : fallback
+}

apps/machine/src/stores/atm.ts

@@ -10,6 +10,7 @@ import {
   type ATMMachine,
 } from '@bitSpire/state-machine'
 import { initializeLightningServices, fetchBtcPrice } from '@/services/lightning'
+import { classifyInitError } from '@/services/init-error'
 import {
   startOperatorConfigService,
   type OperatorConfigService,
@@ -706,7 +707,7 @@ export const useAtmStore = defineStore('atm', () => {
         useLiveServices.value = false
         initialize(mockServices)
       } else {
-        initError.value = error instanceof Error ? error.message : 'Lightning initialization failed'
+        initError.value = classifyInitError(error, 'Lightning initialization failed')
       }
     }
   }
@@ -1019,7 +1020,7 @@ export const useAtmStore = defineStore('atm', () => {
         useLiveServices.value = false
         initialize(mockServices)
       } else {
-        initError.value = error instanceof Error ? error.message : 'HAL initialization failed'
+        initError.value = classifyInitError(error, 'HAL initialization failed')
       }
     }
   }
@@ -1330,7 +1331,7 @@ export const useAtmStore = defineStore('atm', () => {
           initialize(mockServices)
         }
       } else {
-        initError.value = error instanceof Error ? error.message : 'Hardware initialization failed'
+        initError.value = classifyInitError(error, 'Hardware initialization failed')
       }
     }
   }