Push notifications for payments and messages; offline Spending notice

The nwcpush notifier grows a second registration kind alongside NWC:
a notify watch of what it can see without keys — kind-1059 wraps
p-tagged at the user (DMs, direct invites), zap receipts (9735/9737),
and wraps authored by the user's community channel keys (chat). It
pushes a typed nudge, throttled per device (chat bursts collapse); the
service worker shows a generic notification unless a window is visible,
and tapping opens the app. The names registrar reports settled
lightning-address receives server-to-server (token-gated /notify), so
the common payment path notifies even with no nostr event in sight.

The app registers silently whenever permission is already granted and
keeps the watch current as communities change; a dismissible card on
the chat home offers to enable it otherwise. Ark zap receipts (9737)
join the relay whitelist so the payment watch can see them.

Also: the offline Spending receive pane now says you're offline and
offers a one-tap switch to Savings instead of spinning forever.

Co-Authored-By: Claude Fable 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Wvj4aoeMZwA7VUGdJP9Swi

1 files changed, 9 insertions, 1 deletions

diff --git a/src/app.js b/src/app.js
index 795ccc3..a7feb75 100644
--- a/src/app.js
+++ b/src/app.js
@@ -2141,7 +2141,15 @@ function receiveTab() {
   // (receives Ark and Lightning), Savings shows a fresh on-chain address.
   const fresh = wallet.freshReceive();
   const nameMode = featureAll('receiveModes').find((m) => m.id === 'name');
-  if (accountSel() === 'spending' && nameMode) return nameMode.render(null);
+  if (accountSel() === 'spending') {
+    // Spending needs the network (registrar + ark); offline, offer the
+    // on-chain path right here instead of an endless spinner.
+    if (wallet.offline)
+      return h('div', { class: 'card col', style: 'gap:12px' },
+        h('div', { class: 'notice info' }, t('receiveOfflineSpending')),
+        h('button', { class: 'btn-primary btn-block', onClick: () => setAccountSel('savings') }, t('receiveUseSavings')));
+    if (nameMode) return nameMode.render(null);
+  }
   const addr = fresh.address;
   return h(
     'div',