improved push notification settings with health indicators and optimized notification dismissal

lib/push/push_status.dart

@@ -87,6 +87,13 @@ class PushStatusReport {
       (general.registeredProxyServer?.isNotEmpty ?? false) &&
       !proxyEndpointMismatch(general) &&
       general.lastRegistrationError == null;
+
+  /// True when no link in the chain is currently broken. Unknown links stay
+  /// permissive (mirroring [readyForTestNotification]) so a not-yet-loaded
+  /// capability or an undetermined OS permission does not flip the at-a-glance
+  /// health icon to red. Drives the compact status indicator in the settings.
+  bool get chainHealthy =>
+      buildPushStatusRows(this).every((row) => row.state != PushCheck.fail);
 }
 
 /// Collects the current push chain state. Settings/capability flags come from