feat: align shared app foundations

test/common/lifecycle/refresh_coordinator_test.dart

@@ -0,0 +1,22 @@
+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:jinzhi_flutter_app/common/lifecycle/refresh_coordinator.dart';
+
+void main() {
+  testWidgets('refreshes active registrations when returning to foreground', (
+    tester,
+  ) async {
+    final coordinator = RefreshCoordinator();
+    addTearDown(coordinator.dispose);
+    var activeCalls = 0;
+    var inactiveCalls = 0;
+    coordinator.register(onRefresh: () => activeCalls++);
+    coordinator.register(onRefresh: () => inactiveCalls++, active: false);
+
+    coordinator.didChangeAppLifecycleState(AppLifecycleState.resumed);
+    await tester.pump();
+
+    expect(activeCalls, 1);
+    expect(inactiveCalls, 0);
+  });
+}