fix: address review — LNURL quickpay null amount, log quotes, changelog

- Pass null instead of data.sats for LNURL quick-pay so LDK uses the
  invoice's native msat precision (same fix as Bolt11 path)
- Wrap log parameter values in single quotes per CLAUDE.md
- Consolidate duplicate changelog entries into one

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ben-kaufman

CHANGELOG.md

@@ -8,8 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Fixed
-- Preserve msat precision for LNURL pay and withdraw callbacks #879
-- Avoid msat truncation when paying invoices with built-in amounts #879
+- Avoid msat truncation when paying invoices and LNURL callbacks #879
 - Fix ANR on RGS server settings screen caused by catastrophic regex backtracking #880
 - Fix crash when returning app to foreground on Receive screen #875
 - Show loading state on Spending tab when node is not running #875

app/src/main/java/to/bitkit/repositories/LightningRepo.kt

@@ -910,7 +910,7 @@ class LightningRepo @Inject constructor(
             return@runCatching decoded
         }.onFailure {
             Logger.error(
-                "fetchLnurlInvoice error, url: $callbackUrl, amountMsats: $amountMsats, comment: $comment",
+                "fetchLnurlInvoice error, url: '$callbackUrl', amountMsats: '$amountMsats', comment: '$comment'",
                 it,
                 context = TAG,
             )

app/src/main/java/to/bitkit/viewmodels/AppViewModel.kt

@@ -1491,7 +1491,7 @@ class AppViewModel @Inject constructor(
         }
 
         if (isFixed) {
-            Logger.info("Found fixed amount $displaySats sats in lnurlPay, proceeding with payment", context = TAG)
+            Logger.info("Found fixed amount '$displaySats' sats in lnurlPay, proceeding with payment", context = TAG)
 
             val quickPayHandled = handleQuickPayIfApplicable(amountSats = displaySats, lnurlPay = data)
             if (quickPayHandled) return

app/src/main/java/to/bitkit/viewmodels/QuickPayViewModel.kt

@@ -57,7 +57,7 @@ class QuickPayViewModel @Inject constructor(
                             }
                             return@launch
                         }
-                    Triple(invoice.bolt11, data.sats, data.sats)
+                    Triple(invoice.bolt11, null, data.sats)
                 }
             }