feat: update CashOutView UI for noffer-based flow

- Redesign cash-out view for noffer (CLINK Offers) workflow
- Add states: generatingNoffer, displayingNoffer, validatingRequest,
  sendingInvoice, awaitingPayment
- Remove old selectingAmount state (user specifies amount in wallet)
- Add debug controls to simulate offer requests for testing
- Wire up offer request callback in ATM store to state machine

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lamassu-next/apps/machine/src/stores/atm.ts

@@ -156,10 +156,23 @@ export const useAtmStore = defineStore('atm', () => {
         paymentReceived(preimage)
       })
 
-      // Wire up offer request callback (for logging/debugging)
+      // Wire up offer request callback - send to state machine for cash-out flow
       services.onOfferRequest((request, sender) => {
         console.log('[ATM] Offer request from:', sender.slice(0, 16) + '...')
         console.log('[ATM] Amount requested:', request.amount_sats, 'sats')
+
+        // Send to state machine if we're in the displayingNoffer state
+        if (nestedState.value === 'displayingNoffer') {
+          send({
+            type: 'OFFER_REQUEST_RECEIVED',
+            request: {
+              eventId: request.offer || 'unknown',
+              payerPubkey: sender,
+              amountSats: request.amount_sats,
+              description: request.description,
+            },
+          })
+        }
       })
 
       // Initialize state machine with real services

lamassu-next/apps/machine/src/views/CashOutView.vue

@@ -25,13 +25,6 @@ watch(
 const nestedState = computed(() => atmStore.nestedState)
 const context = computed(() => atmStore.context)
 
-// Available denominations for cash-out
-const amounts = [20, 40, 60, 80, 100]
-
-function selectAmount(amount: number) {
-  atmStore.selectAmount(amount)
-}
-
 function cancel() {
   atmStore.cancel()
 }
@@ -47,6 +40,10 @@ function skipReceipt() {
 function formatSats(sats: number): string {
   return sats.toLocaleString()
 }
+
+function formatFiat(cents: number): string {
+  return (cents / 100).toFixed(2)
+}
 </script>
 
 <template>
@@ -68,56 +65,131 @@ function formatSats(sats: number): string {
         </CardContent>
       </Card>
 
-      <!-- Select Amount -->
+      <!-- Generating Noffer -->
-      <Card v-else-if="nestedState === 'selectingAmount'" class="border-0 bg-white/5">
+      <Card v-else-if="nestedState === 'generatingNoffer'" class="w-80 border-0 bg-white/5">
+        <CardContent class="flex flex-col items-center gap-4 p-8">
+          <Skeleton class="h-10 w-10 rounded-full" />
+          <p class="text-muted-foreground">Preparing payment code...</p>
+        </CardContent>
+      </Card>
+
+      <!-- Display Noffer QR - Main cash-out screen -->
+      <Card v-else-if="nestedState === 'displayingNoffer'" class="w-[480px] border-0 bg-white/5">
         <CardHeader class="text-center">
-          <CardTitle>Select Amount</CardTitle>
+          <CardTitle>Scan to Sell Bitcoin</CardTitle>
           <CardDescription v-if="context">
-            Rate: {{ formatSats(context.exchangeRate) }} sats/$
+            Current rate:
+            <Badge variant="secondary">{{ formatSats(context.exchangeRate) }} sats/$</Badge>
           </CardDescription>
         </CardHeader>
-        <CardContent>
+        <CardContent class="space-y-6">
-          <div class="grid grid-cols-3 gap-4">
+          <!-- Noffer QR Code -->
-            <Card
+          <div class="flex flex-col items-center">
-              v-for="amount in amounts"
+            <QRCode v-if="context?.nofferString" :value="context.nofferString" :size="220" />
-              :key="amount"
+            <p class="mt-4 text-center text-sm text-muted-foreground">
-              class="cursor-pointer border-2 border-transparent bg-white/5 transition hover:border-orange-500 hover:bg-white/10"
+              Scan with your Lightning wallet
-              @click="selectAmount(amount)"
+            </p>
-            >
-              <CardContent class="flex flex-col items-center p-4">
-                <span class="text-2xl font-bold">${{ amount }}</span>
-                <span v-if="context" class="mt-1 text-sm text-muted-foreground">
-                  ≈ {{ formatSats(Math.floor(amount * context.exchangeRate)) }} sats
-                </span>
-              </CardContent>
-            </Card>
           </div>
+
+          <!-- Instructions -->
+          <Alert class="border-orange-500/50 bg-orange-500/10">
+            <AlertDescription>
+              <p class="mb-2 text-sm font-medium text-orange-400">How it works:</p>
+              <ol class="space-y-1 text-xs text-muted-foreground">
+                <li>1. Scan the QR code with Shock Wallet or compatible wallet</li>
+                <li>2. Enter the amount you want to sell (in sats)</li>
+                <li>3. Confirm the payment in your wallet</li>
+                <li>4. Receive cash from the ATM</li>
+              </ol>
+            </AlertDescription>
+          </Alert>
+
+          <!-- Info about limits -->
+          <div class="rounded-lg bg-white/5 p-4 text-center">
+            <p class="text-sm text-muted-foreground">
+              Limits: <Badge variant="outline">$1 - $500</Badge>
+            </p>
+            <p class="mt-1 text-xs text-muted-foreground">Waiting for payment request...</p>
+          </div>
+
+          <!-- Debug: Simulate offer request -->
+          <Alert v-if="atmStore.debugMode" class="border-red-500/50 bg-red-500/10">
+            <AlertDescription class="text-center">
+              <p class="mb-2 text-xs text-red-400">Dev: Simulate offer request</p>
+              <Button
+                variant="outline"
+                size="sm"
+                @click="
+                  atmStore.send({
+                    type: 'OFFER_REQUEST_RECEIVED',
+                    request: {
+                      eventId: 'mock-event-' + Date.now(),
+                      payerPubkey: 'mock-pubkey-' + Date.now(),
+                      amountSats: 250000,
+                      description: 'Mock cash out',
+                    },
+                  })
+                "
+              >
+                Simulate $100 Request (250k sats)
+              </Button>
+            </AlertDescription>
+          </Alert>
+        </CardContent>
+      </Card>
+
+      <!-- Validating Request -->
+      <Card v-else-if="nestedState === 'validatingRequest'" class="w-80 border-0 bg-white/5">
+        <CardContent class="flex flex-col items-center gap-4 p-8">
+          <Skeleton class="h-10 w-10 rounded-full" />
+          <p class="text-muted-foreground">Validating amount...</p>
+          <p v-if="context" class="text-sm text-orange-400">
+            {{ formatSats(context.satsAmount) }} sats requested
+          </p>
         </CardContent>
       </Card>
 
       <!-- Generating Invoice -->
-      <Card
+      <Card v-else-if="nestedState === 'generatingInvoice'" class="w-80 border-0 bg-white/5">
-        v-else-if="nestedState === 'calculatingInvoice' || nestedState === 'generatingInvoice'"
-        class="w-80 border-0 bg-white/5"
-      >
         <CardContent class="flex flex-col items-center gap-4 p-8">
           <Skeleton class="h-10 w-10 rounded-full" />
-          <p class="text-muted-foreground">Generating invoice...</p>
+          <p class="text-muted-foreground">Creating invoice...</p>
         </CardContent>
       </Card>
 
-      <!-- Display Invoice QR -->
+      <!-- Sending Invoice -->
-      <Card v-else-if="nestedState === 'displayingInvoice'" class="w-96 border-0 bg-white/5">
+      <Card v-else-if="nestedState === 'sendingInvoice'" class="w-80 border-0 bg-white/5">
+        <CardContent class="flex flex-col items-center gap-4 p-8">
+          <Skeleton class="h-10 w-10 rounded-full" />
+          <p class="text-muted-foreground">Sending invoice to wallet...</p>
+        </CardContent>
+      </Card>
+
+      <!-- Awaiting Payment -->
+      <Card v-else-if="nestedState === 'awaitingPayment'" class="w-96 border-0 bg-white/5">
         <CardHeader class="text-center">
-          <CardTitle>Scan to Pay</CardTitle>
+          <CardTitle>Waiting for Payment</CardTitle>
           <CardDescription v-if="context">
             Pay <Badge variant="secondary">{{ formatSats(context.satsAmount) }} sats</Badge> to
-            receive <Badge class="bg-green-600">${{ context.fiatAmount / 100 }}</Badge>
+            receive <Badge class="bg-green-600">${{ formatFiat(context.fiatAmount) }}</Badge>
           </CardDescription>
         </CardHeader>
         <CardContent class="space-y-4">
-          <QRCode v-if="context?.invoice" :value="context.invoice" :size="200" />
+          <div class="flex flex-col items-center gap-4 py-8">
-          <p class="text-center text-sm text-muted-foreground">Waiting for payment...</p>
+            <div class="h-16 w-16 animate-pulse rounded-full bg-orange-500/20">
+              <div class="flex h-full items-center justify-center text-3xl">⏳</div>
+            </div>
+            <p class="text-center text-muted-foreground">
+              Please confirm the payment in your wallet
+            </p>
+          </div>
+
+          <!-- Invoice info (collapsed) -->
+          <div v-if="context?.invoice" class="rounded-lg bg-white/5 p-3 text-center">
+            <p class="truncate font-mono text-xs text-muted-foreground">
+              {{ context.invoice.slice(0, 40) }}...
+            </p>
+          </div>
 
           <!-- Dev controls -->
           <Alert v-if="atmStore.debugMode" class="border-red-500/50 bg-red-500/10">
@@ -150,7 +222,7 @@ function formatSats(sats: number): string {
           <CardTitle class="text-green-400">Cash Ready!</CardTitle>
           <p v-if="context">
             Please take your
-            <Badge class="bg-green-600 text-lg">${{ context.fiatAmount / 100 }}</Badge>
+            <Badge class="bg-green-600 text-lg">${{ formatFiat(context.fiatAmount) }}</Badge>
           </p>
           <Button
             class="bg-gradient-to-r from-orange-500 to-yellow-400 text-black hover:from-orange-600 hover:to-yellow-500"