Fast-poll the receive address while watching for a payment

The WS badge reads Live but mempool.space's free address tracking doesn't
reliably push incoming mempool txs, so a deposit could take ~18s to appear (the
25s safety poll catching it). While the user is on the Receive tab (online), now
poll just the fresh receive address every ~3s regardless of Live state — one
cheap request that guarantees near-instant arrival. Toggled idempotently from
render() based on the active tab; stops when they navigate away.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/app.js b/src/app.js
index 53e118e..9c9c22a 100644
--- a/src/app.js
+++ b/src/app.js
@@ -233,6 +233,9 @@ function render() {
             ? howItWorksScreen()
             : unlockScreen();
   root.replaceChildren(screen, footer());
+  // Fast-poll the receive address only while the user is actually watching for a
+  // payment (wallet screen, Receive tab, online). Idempotent — safe each render.
+  wallet.setWatchReceive(ui.screen === 'wallet' && ui.tab === 'receive' && !wallet.offline);
 }
 wallet.subscribe(render);