fix(status): report payjoin as disabled, not offline, when off

Adds ServiceStatus.disabled (intentionally turned off, distinct from
unknown/not-checked) and returns it for the payjoin service the moment
the setting is off, instead of probing the OHTTP relay and painting the
whole status page red for a feature the user isn't relying on. The
status page shows it muted-grey with a "Disabled" label, and it no
longer counts against allServicesOnline.

Author: ethicnology

lib/core/status/domain/entity/service_status.dart

@@ -2,7 +2,10 @@ import 'package:freezed_annotation/freezed_annotation.dart';
 
 part 'service_status.freezed.dart';
 
-enum ServiceStatus { online, offline, unknown }
+/// [disabled]: the service is intentionally turned off by the user (e.g.
+/// payjoin off in settings), so it is neither reachable-checked nor a
+/// problem — distinct from [unknown] (not checked / indeterminate).
+enum ServiceStatus { online, offline, unknown, disabled }
 
 @freezed
 sealed class ServiceStatusInfo with _$ServiceStatusInfo {
@@ -17,6 +20,7 @@ sealed class ServiceStatusInfo with _$ServiceStatusInfo {
   bool get isOnline => status == ServiceStatus.online;
   bool get isOffline => status == ServiceStatus.offline;
   bool get isUnknown => status == ServiceStatus.unknown;
+  bool get isDisabled => status == ServiceStatus.disabled;
 }
 
 @freezed
@@ -112,7 +116,8 @@ sealed class AllServicesStatus with _$AllServicesStatus {
       bitcoinElectrum.isOnline &&
       liquidElectrum.isOnline &&
       boltz.isOnline &&
-      payjoin.isOnline &&
+      // Payjoin is opt-in: disabled is not a fault (see _checkPayjoinService).
+      (payjoin.isOnline || payjoin.isDisabled) &&
       pricer.isOnline &&
       mempool.isOnline &&
       (tor.isOnline || tor.isUnknown) &&

lib/core/status/domain/usecases/check_all_service_status_usecase.dart

@@ -146,6 +146,19 @@ class CheckAllServiceStatusUsecase {
 
   Future<ServiceStatusInfo> _checkPayjoinService() async {
     try {
+      // Payjoin is opt-in: when it's disabled in settings the OHTTP relay is
+      //  not in use, so report `disabled` (not `offline`/red) — probing a
+      //  relay the user isn't relying on and painting the whole status page
+      //  red for it is misleading.
+      final settings = await _settingsRepository.fetch();
+      if (!settings.isPayjoinEnabled) {
+        return ServiceStatusInfo(
+          status: ServiceStatus.disabled,
+          name: 'Payjoin',
+          lastChecked: DateTime.now(),
+        );
+      }
+
       final isHealthy = await _payjoinRepository.checkOhttpRelayHealth();
 
       return ServiceStatusInfo(

lib/features/status_check/service_status_page.dart

@@ -137,6 +137,7 @@ class _ServiceStatusItem extends StatelessWidget {
       case ServiceStatus.offline:
         return context.appColors.error;
       case ServiceStatus.unknown:
+      case ServiceStatus.disabled:
         return context.appColors.textMuted;
     }
   }
@@ -149,6 +150,8 @@ class _ServiceStatusItem extends StatelessWidget {
         return context.loc.statusCheckOffline;
       case ServiceStatus.unknown:
         return context.loc.statusCheckUnknown;
+      case ServiceStatus.disabled:
+        return context.loc.statusCheckDisabled;
     }
   }
 }

localization/app_en.arb

@@ -14887,5 +14887,9 @@
   "receivePayjoinActivated": "Payjoin activated",
   "@receivePayjoinActivated": {
     "description": "Message indicating that payjoin is activated for the receive transaction"
+  },
+  "statusCheckDisabled": "Disabled",
+  "@statusCheckDisabled": {
+    "description": "Status label on the service status page for a service the user has intentionally turned off (e.g. payjoin disabled in settings)."
   }
 }