feat(wallet): paste-send confirmation step + every-time scan/upload chooser

- Pasting an invoice/address now gets the same second-step confirmation the
  scan flow has: method, destination, live balance -> amount -> balance
  after (invoice-fixed amounts win over the typed one), for every rail
  including token minting. Nothing pays until Confirm & Send.
- The scan modal opens on a chooser every time: scan with camera or
  upload/take a photo of the QR — the camera no longer auto-starts, and
  Back only relights it if camera was the user's choice.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

neode-ui/src/components/SendBitcoinModal.vue

@@ -1,5 +1,54 @@
 <template>
   <BaseModal :show="show" :title="t('web5.sendBitcoinTitle')" max-width="max-w-2xl" content-class="max-h-[90vh] overflow-y-auto" @close="close">
+        <!-- ============ CONFIRM PANE (second step, mirrors the scan flow) ============ -->
+        <template v-if="confirming">
+          <div class="mb-3 p-3 bg-white/5 rounded-lg">
+            <div class="flex items-center justify-between mb-2">
+              <span class="text-xs text-white/50">Method</span>
+              <span class="text-sm font-medium" :class="methodColor">{{ methodLabel }}</span>
+            </div>
+            <div v-if="dest.trim()" class="mb-1">
+              <p class="text-xs text-white/50 mb-1">{{ effectiveMethod === 'lightning' ? 'Invoice' : effectiveMethod === 'ark' ? 'Destination' : 'Address' }}</p>
+              <p class="text-xs font-mono text-white/80 break-all">{{ destDisplay }}</p>
+            </div>
+            <p v-else class="text-xs text-white/60">Creates a {{ methodLabel }} token you can share — sats leave your balance when it's redeemed.</p>
+          </div>
+
+          <!-- Live balance impact -->
+          <div class="mb-3 p-3 bg-white/5 rounded-lg space-y-1.5">
+            <div class="flex items-center justify-between">
+              <span class="text-xs text-white/50">{{ methodLabel }} balance</span>
+              <span class="text-sm font-medium text-white/80">{{ confirmBalance === null ? '…' : confirmBalance.toLocaleString() + ' sats' }}</span>
+            </div>
+            <div class="flex items-center justify-between">
+              <span class="text-xs text-white/50 flex items-center gap-2">
+                Amount
+                <span v-if="invoiceAmountSats !== null" class="text-[11px] px-2 py-0.5 rounded-full bg-white/10 text-white/50">set by invoice</span>
+              </span>
+              <span class="text-sm font-medium text-white/80">−{{ confirmAmount.toLocaleString() }} sats</span>
+            </div>
+            <div class="flex items-center justify-between">
+              <span class="text-xs text-white/50">Balance after</span>
+              <span class="text-sm font-medium" :class="insufficient ? 'text-red-400' : 'text-white/80'">
+                {{ confirmBalance === null ? '…' : balanceAfter.toLocaleString() + ' sats' }}
+              </span>
+            </div>
+          </div>
+          <p v-if="insufficient" class="text-xs text-red-400 mb-3">Not enough {{ methodLabel }} balance for this amount.</p>
+          <p v-else-if="isSweep" class="text-xs text-white/50 mb-3">Sweeps the entire on-chain balance minus network fees.</p>
+          <p v-else-if="effectiveMethod === 'onchain'" class="text-xs text-white/50 mb-3">Network fees are deducted on top of the amount.</p>
+
+          <div v-if="error" class="mb-3 alert-error">{{ error }}</div>
+
+          <div class="flex gap-3">
+            <button @click="confirming = false" :disabled="processing" class="flex-1 glass-button px-4 py-2 rounded-lg text-sm">Back</button>
+            <button @click="send" :disabled="processing || insufficient || (confirmAmount <= 0 && !isSweep)" class="flex-1 glass-button glass-button-warning px-4 py-2 rounded-lg text-sm font-medium disabled:opacity-50">
+              {{ processing ? t('common.sending') : 'Confirm & Send' }}
+            </button>
+          </div>
+        </template>
+
+        <template v-else>
         <!-- Method tabs -->
         <div class="flex gap-1 mb-4 p-1 bg-white/5 rounded-lg">
           <button
@@ -80,10 +129,11 @@
             </svg>
             Scan
           </button>
-          <button @click="send" :disabled="processing || (!amount && !isSweep)" class="flex-1 glass-button glass-button-warning px-4 py-2 rounded-lg text-sm font-medium disabled:opacity-50">
-            {{ processing ? t('common.sending') : t('common.send') }}
+          <button @click="review" :disabled="processing" class="flex-1 glass-button glass-button-warning px-4 py-2 rounded-lg text-sm font-medium disabled:opacity-50">
+            {{ t('common.send') }}
           </button>
         </div>
+        </template>
   </BaseModal>
 </template>
 
@@ -136,12 +186,95 @@ const effectiveMethod = computed(() => {
   return 'lightning'
 })
 
+// --- Second-step confirmation (parity with the scan flow): review shows the
+// --- balance reduction before anything is sent or any token is minted.
+
+const confirming = ref(false)
+const confirmBalance = ref<number | null>(null)
+const invoiceAmountSats = ref<number | null>(null)
+
+const methodLabel = computed(() => ({
+  auto: 'Auto', lightning: 'Lightning', onchain: 'On-chain',
+  ecash: 'Cashu', fedimint: 'Fedimint', ark: 'Ark',
+}[effectiveMethod.value]))
+
+const methodColor = computed(() => ({
+  auto: 'text-white/80', lightning: 'text-yellow-400', onchain: 'text-orange-500',
+  ecash: 'text-purple-400', fedimint: 'text-blue-400', ark: 'text-teal-400',
+}[effectiveMethod.value]))
+
+const destDisplay = computed(() => {
+  const d = dest.value.trim()
+  return d.length > 64 ? `${d.slice(0, 38)}…${d.slice(-18)}` : d
+})
+
+/** Amount encoded in a BOLT11 invoice's human-readable part, in sats (null = zero-amount). */
+function parseBolt11AmountSats(invoice: string): number | null {
+  const m = /^ln(?:bcrt|bc|tb)(\d+)?([munp])?1/.exec(invoice.toLowerCase())
+  if (!m || !m[1]) return null
+  const value = Number(m[1])
+  const mult = { m: 1e-3, u: 1e-6, n: 1e-9, p: 1e-12 }[m[2] as 'm' | 'u' | 'n' | 'p'] ?? 1
+  return Math.round(value * mult * 1e8)
+}
+
+// An invoice-fixed amount always wins over the typed one; a sweep is priced
+// at the whole balance.
+const confirmAmount = computed(() => {
+  if (isSweep.value) return confirmBalance.value ?? 0
+  if (effectiveMethod.value === 'lightning' && invoiceAmountSats.value !== null) return invoiceAmountSats.value
+  return amount.value > 0 ? Math.floor(amount.value) : 0
+})
+const balanceAfter = computed(() => (confirmBalance.value ?? 0) - confirmAmount.value)
+const insufficient = computed(() =>
+  confirmBalance.value !== null && confirmAmount.value > confirmBalance.value && !isSweep.value
+)
+
+async function loadConfirmBalance() {
+  confirmBalance.value = null
+  try {
+    if (effectiveMethod.value === 'ecash') {
+      const res = await rpcClient.call<{ balance_sats: number }>({ method: 'wallet.ecash-balance' })
+      confirmBalance.value = res.balance_sats ?? 0
+    } else if (effectiveMethod.value === 'fedimint') {
+      const res = await rpcClient.call<{ balance_sats: number }>({ method: 'wallet.fedimint-balance' })
+      confirmBalance.value = res.balance_sats ?? 0
+    } else {
+      const res = await rpcClient.call<{ balance_sats: number; channel_balance_sats: number }>({ method: 'lnd.getinfo' })
+      confirmBalance.value = effectiveMethod.value === 'onchain'
+        ? (res.balance_sats ?? 0)
+        : (res.channel_balance_sats ?? 0)
+    }
+  } catch {
+    confirmBalance.value = null // balance preview is best-effort; send still guarded server-side
+  }
+}
+
+function review() {
+  error.value = ''
+  const method = effectiveMethod.value
+  const d = dest.value.trim()
+  if (method === 'lightning') {
+    if (!d) { error.value = t('web5.pasteInvoice'); return }
+    invoiceAmountSats.value = parseBolt11AmountSats(d)
+  } else {
+    invoiceAmountSats.value = null
+    if (method === 'ark' && !d) { error.value = 'Enter an Ark address, invoice or lightning address'; return }
+    if (method === 'onchain' && !d) { error.value = t('web5.enterBitcoinAddress'); return }
+  }
+  if (!isSweep.value && confirmAmount.value <= 0 && invoiceAmountSats.value === null) {
+    error.value = t('sendBitcoin.amountSats'); return
+  }
+  void loadConfirmBalance()
+  confirming.value = true
+}
+
 function close() {
   error.value = ''
   resultTxid.value = ''
   resultHash.value = ''
   resultArk.value = ''
   ecashToken.value = ''
+  confirming.value = false
   emit('close')
 }
 
@@ -162,7 +295,8 @@ watch(ecashToken, async (token) => {
 
 async function send() {
   if (processing.value) return
-  if (!amount.value && !isSweep.value) return
+  // Zero typed amount is fine when the invoice fixes the amount or we sweep.
+  if (!amount.value && !isSweep.value && invoiceAmountSats.value === null) return
   processing.value = true
   error.value = ''
   ecashToken.value = ''
@@ -212,6 +346,8 @@ async function send() {
       resultTxid.value = res.txid
     }
     emit('sent')
+    // Back to the form pane so the success/token panes are visible.
+    confirming.value = false
   } catch (err: unknown) {
     error.value = err instanceof Error ? err.message : t('web5.sendFailed')
   } finally {

neode-ui/src/components/WalletScanModal.vue

@@ -43,7 +43,22 @@
           <Transition :name="direction === 'forward' ? 'pane-forward' : 'pane-back'" mode="out-in">
             <!-- ============ SCAN PANE ============ -->
             <div v-if="pane === 'scan'" key="scan">
-              <div class="relative w-full aspect-square rounded-xl overflow-hidden bg-black/40 border border-white/10 mb-4">
+              <!-- Chooser interstitial — every open: the user picks live camera
+                   or a photo upload; neither starts until chosen. -->
+              <div v-if="scanChoice === 'unset'" class="w-full rounded-xl bg-black/30 border border-white/10 mb-4 p-6 flex flex-col items-center gap-3">
+                <svg class="w-10 h-10 text-white/40" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                  <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M3 8V6a2 2 0 012-2h2M3 16v2a2 2 0 002 2h2m10-16h2a2 2 0 012 2v2m-4 12h2a2 2 0 002-2v-2M7 12h10" />
+                </svg>
+                <p class="text-sm text-white/60 text-center">How do you want to read the QR?</p>
+                <button v-if="!liveCameraUnavailable" @click="chooseCamera" class="glass-button w-full px-4 py-2.5 rounded-lg text-sm font-medium">
+                  Scan with camera
+                </button>
+                <button @click="photoInput?.click()" class="glass-button w-full px-4 py-2.5 rounded-lg text-sm font-medium">
+                  Upload / take a photo of the QR
+                </button>
+              </div>
+
+              <div v-else class="relative w-full aspect-square rounded-xl overflow-hidden bg-black/40 border border-white/10 mb-4">
                 <!-- opacity (not v-if/v-show): the scanner needs the element, and a
                      source-less <video> flashes a native play glyph in Android WebViews -->
                 <video ref="videoElement" class="w-full h-full object-cover transition-opacity duration-200" :class="isScanning ? 'opacity-100' : 'opacity-0'" autoplay muted playsinline></video>
@@ -73,17 +88,20 @@
                   <button @click="photoInput?.click()" class="glass-button px-4 py-2 rounded-lg text-sm font-medium">
                     Take photo of QR
                   </button>
-                  <input
-                    ref="photoInput"
-                    type="file"
-                    accept="image/*"
-                    capture="environment"
-                    class="hidden"
-                    @change="onPhotoPicked"
-                  />
                 </div>
               </div>
 
+              <!-- Single always-mounted picker input, shared by the chooser and
+                   the in-camera fallback button -->
+              <input
+                ref="photoInput"
+                type="file"
+                accept="image/*"
+                capture="environment"
+                class="hidden"
+                @change="onPhotoPicked"
+              />
+
               <div class="mb-4 p-3 bg-white/5 rounded-lg min-h-[3rem] flex items-center justify-center">
                 <p class="text-sm text-center" :class="scanStatusIsError ? 'text-red-400' : 'text-white/60'">
                   {{ scanStatus || 'Point the camera at a Lightning invoice, Bitcoin address, Cashu or Fedimint code' }}
@@ -282,7 +300,9 @@ function goBack() {
   if (pane.value === 'amount') {
     error.value = ''
     goTo('scan', 'back')
-    nextTick(() => { if (!liveCameraUnavailable.value) startScanning() })
+    // Only relight the camera when that's what the user chose; otherwise
+    // they land back on the scan/upload chooser.
+    nextTick(() => { if (scanChoice.value === 'camera' && !liveCameraUnavailable.value) startScanning() })
   } else if (pane.value === 'success') {
     close()
   }
@@ -295,6 +315,16 @@ const isScanning = ref(false)
 // open) — the fallback buttons stay hidden until it resolves, so they don't
 // flash for a second on every open.
 const autoStarting = ref(false)
+
+// Camera-vs-photo chooser, shown on EVERY open (user request 2026-07-23):
+// nothing starts until the user picks, and Back from a later pane returns to
+// the live camera only if that's what they chose.
+const scanChoice = ref<'unset' | 'camera'>('unset')
+
+function chooseCamera() {
+  scanChoice.value = 'camera'
+  void nextTick(() => startScanning())
+}
 const scanStatus = ref('')
 const scanStatusIsError = ref(false)
 const cameraError = ref(false)
@@ -709,7 +739,8 @@ function close() {
 watch(() => props.show, (open) => {
   if (open) {
     resetAll()
-    nextTick(() => { if (!liveCameraUnavailable.value) startScanning() })
+    // No auto-start: the chooser interstitial owns the first move every time.
+    scanChoice.value = 'unset'
   } else {
     stopScanning()
   }