docs: backlog — ship lightning false-failure fix; companion app version display

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

docs/UNIFIED-TASK-TRACKER.md

@@ -15,6 +15,19 @@ those are marked ✅ below with the commit that did it, so we stop re-litigating
 
 ## Tier 0 — Quick / mechanical, no blockers
 
+- [ ] **Ship the lightning payment false-failure fix in the next release** (fixed
+      on main 2026-07-27, needs OTA). Slow multi-hop payments (>15s) surfaced as
+      "Payment failed" while LND settled them in the background — the shared LND
+      REST client's 15s timeout aborted the synchronous `/v1/channels/transactions`
+      wait. Now: payinvoice decodes the invoice first for its payment hash, waits
+      up to 120s on a dedicated client, returns `status: "pending"` (never a
+      failure) on timeout, and the new `lnd.paymentstatus` RPC + frontend
+      `payLightningInvoice()` helper poll to a real terminal state (all 5 UI call
+      sites migrated). Verify on Framework PT with a real multi-hop payment.
+- [ ] **Show the app version on the companion mobile-app banner in the app store
+      and on its install/pairing modal** (user request 2026-07-27) — so it's
+      obvious at a glance whether the node is serving the latest APK build.
+
 - [ ] **Update `tests/lifecycle/TESTING.md`'s stale Release Gates checklist** (lines
       289–296) — several boxes are unchecked but actually true now:
   - #1 bitcoin-stops: covered by `tests/lifecycle/bats/bitcoin-knots.bats` stop/restart