fix(wallet): channel modals above settings modal, tx rail filters, LND seed-backup prompt

- Open/Close Channel modals sat at z-[60], BEHIND the wallet settings
  BaseModal (z-3000) — clicking 'Open Channel' looked like nothing
  happened while the form changed in the background. Raised to z-3100.
- TransactionsModal gains rail filter chips (All / On-chain / Lightning
  / Ecash with counts): instant ecash micro-payments were burying the
  standard transactions.
- Global LND seed-backup banner: once the wallet exists and the seed is
  un-acknowledged, a dismissible glass banner (24h snooze) prompts and
  routes to the LND backup card; polls only when authenticated, stops
  permanently once acked.

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

neode-ui/src/components/TransactionsModal.vue

@@ -1,12 +1,32 @@
 <template>
   <BaseModal :show="show" :title="t('transactions.title')" max-width="max-w-2xl" content-class="max-h-[90vh] flex flex-col" @close="close">
+        <!-- Rail filter: instant ecash micro-payments pile up fast and bury
+             on-chain/Lightning rows; chips keep the standard txs reachable. -->
+        <div v-if="transactions.length > 0" class="flex gap-1.5 mb-3 shrink-0 flex-wrap">
+          <button
+            v-for="f in filters"
+            :key="f.key"
+            class="px-2.5 py-1 rounded-full text-xs transition-colors"
+            :class="activeFilter === f.key
+              ? 'bg-orange-500/25 text-orange-200 border border-orange-400/40'
+              : 'bg-white/5 text-white/50 border border-white/10 hover:text-white/80'"
+            @click="activeFilter = f.key"
+          >
+            {{ f.label }}<span v-if="countFor(f.key)" class="text-white/35"> · {{ countFor(f.key) }}</span>
+          </button>
+        </div>
+
         <div v-if="transactions.length === 0" class="flex-1 flex items-center justify-center py-12">
           <p class="text-white/40 text-sm">{{ t('transactions.noTransactionsYet') }}</p>
         </div>
 
+        <div v-else-if="filteredTransactions.length === 0" class="flex-1 flex items-center justify-center py-12">
+          <p class="text-white/40 text-sm">No {{ activeFilter }} transactions</p>
+        </div>
+
         <div v-else class="flex-1 overflow-y-auto -mx-2 px-2 divide-y divide-white/5">
           <div
-            v-for="tx in transactions"
+            v-for="tx in filteredTransactions"
             :key="(tx.kind || 'onchain') + tx.tx_hash + tx.time_stamp"
             class="flex items-center justify-between gap-3 py-3 hover:bg-white/5 rounded-lg px-2 transition-colors"
             :class="isOnchain(tx) ? 'cursor-pointer' : 'cursor-default'"
@@ -75,6 +95,7 @@
 </template>
 
 <script setup lang="ts">
+import { ref, computed } from 'vue'
 import { useI18n } from 'vue-i18n'
 import BaseModal from '@/components/BaseModal.vue'
 import { useAppLauncherStore } from '@/stores/appLauncher'
@@ -93,7 +114,7 @@ interface WalletTransaction {
   kind?: 'onchain' | 'lightning' | 'cashu' | 'fedimint'
 }
 
-defineProps<{
+const props = defineProps<{
   show: boolean
   transactions: WalletTransaction[]
 }>()
@@ -101,6 +122,28 @@ defineProps<{
 const emit = defineEmits<{ close: [] }>()
 const { t } = useI18n()
 
+type FilterKey = 'all' | 'onchain' | 'lightning' | 'ecash'
+const filters: Array<{ key: FilterKey; label: string }> = [
+  { key: 'all', label: 'All' },
+  { key: 'onchain', label: 'On-chain' },
+  { key: 'lightning', label: '⚡ Lightning' },
+  { key: 'ecash', label: 'Ecash' },
+]
+const activeFilter = ref<FilterKey>('all')
+
+function matchesFilter(tx: WalletTransaction, f: FilterKey): boolean {
+  if (f === 'all') return true
+  if (f === 'onchain') return isOnchain(tx)
+  if (f === 'lightning') return tx.kind === 'lightning'
+  return tx.kind === 'cashu' || tx.kind === 'fedimint'
+}
+
+const filteredTransactions = computed(() => props.transactions.filter(tx => matchesFilter(tx, activeFilter.value)))
+function countFor(f: FilterKey): number {
+  if (f === 'all') return 0
+  return props.transactions.filter(tx => matchesFilter(tx, f)).length
+}
+
 function close() {
   emit('close')
 }