fix(wallet+companion): pre-demo blockers — Send modal TDZ crash, cold-start inset collapse, loader branding — 0.5.10

- SendBitcoinModal crashed AT MOUNT on device ('Cannot access R before
  initialization'): the invoice-first block's watch() evaluates its
  computed source at setup, which read effectiveMethod while still in
  its temporal dead zone (declared 20 lines later). Send button did
  nothing and the failure poisoned sibling modal data. Block moved below
  effectiveMethod, with a comment so it can't drift back.
- Cold start injected 0px safe-area vars (onPageFinished can beat window
  attachment; rootWindowInsets null) — UI lost top/bottom margins and
  the tab bar sat in the gesture zone eating taps. Injection extracted
  to injectSafeAreaVars(), re-fired from an OnApplyWindowInsetsListener
  when real insets arrive, on page finish, and on reattach.
- MeshLoadingScreen wears the proper brand: pixel 'a' in the black
  circle-container + F*CK IPS MESH wordmark.

Served APK: 0.5.10 (vc30). Reproduced+diagnosed live on-device.

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

neode-ui/src/components/SendBitcoinModal.vue

@@ -193,22 +193,6 @@ function toggleSendAll() {
 // Leaving the on-chain tab disarms the sweep so it can never apply elsewhere
 watch(sendMethod, (m) => { if (m !== 'onchain') sendAll.value = false })
 
-// Invoice-first lightning UX: a pasted invoice that fixes its amount locks
-// the amount field (auto-filled, "set by invoice"); zero-amount invoices
-// leave it editable. Clearing/leaving lightning unlocks again.
-const pastedInvoiceAmount = computed<number | null>(() => {
-  if (effectiveMethod.value !== 'lightning') return null
-  const d = dest.value.trim()
-  if (!d) return null
-  return parseBolt11AmountSats(d.toLowerCase().startsWith('lightning:') ? d.slice(10) : d)
-})
-watch(pastedInvoiceAmount, (fixed, prev) => {
-  if (fixed !== null) amount.value = fixed
-  // Swapping a fixed-amount invoice for a zero-amount one: don't silently
-  // keep the previous invoice's sats — make the user type the new amount.
-  else if (prev !== null) amount.value = 0
-})
-
 // Clipboard read needs a secure context (or the companion bridge); hide the
 // button where it can't work — the textarea still accepts a manual paste.
 const canReadClipboard = typeof navigator !== 'undefined' && !!navigator.clipboard?.readText
@@ -231,6 +215,25 @@ const effectiveMethod = computed(() => {
   return 'lightning'
 })
 
+// Invoice-first lightning UX: a pasted invoice that fixes its amount locks
+// the amount field (auto-filled, "set by invoice"); zero-amount invoices
+// leave it editable. Clearing/leaving lightning unlocks again.
+// MUST come after effectiveMethod: watch() evaluates its source getter at
+// setup, and reading a const still in its temporal dead zone crashed the
+// whole modal at mount ("Cannot access 'R' before initialization").
+const pastedInvoiceAmount = computed<number | null>(() => {
+  if (effectiveMethod.value !== 'lightning') return null
+  const d = dest.value.trim()
+  if (!d) return null
+  return parseBolt11AmountSats(d.toLowerCase().startsWith('lightning:') ? d.slice(10) : d)
+})
+watch(pastedInvoiceAmount, (fixed, prev) => {
+  if (fixed !== null) amount.value = fixed
+  // Swapping a fixed-amount invoice for a zero-amount one: don't silently
+  // keep the previous invoice's sats — make the user type the new amount.
+  else if (prev !== null) amount.value = 0
+})
+
 // --- Second-step confirmation (parity with the scan flow): review shows the
 // --- balance reduction before anything is sent or any token is minted.