Add app source and tests

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

lib/Peach/see/health/ViewHealth.dart

@@ -0,0 +1,48 @@
+import '../../about/external/data/Health.dart';
+import '../../about/internal/application/ServerProfile.dart';
+import '../parent/ParentViewModel.dart';
+import 'ConnectHealth.dart';
+
+class ViewHealth extends ParentViewModel {
+  ConnectHealth connection;
+
+  ViewHealth(super.context, this.connection);
+
+  bool _running = false;
+
+  bool get isRunning => _running;
+
+  /// Checks every service on every server, reporting each result as it lands.
+  /// A server that can't be reached marks its own services unhealthy and the
+  /// sweep moves on, so one dead box doesn't stall the whole dashboard.
+  void runSweep(List<ServerProfile> servers) async {
+    if (_running) return;
+    _running = true;
+    notifyListeners();
+    connection.onSweepStarted();
+
+    for (final server in servers) {
+      for (final service in server.services) {
+        try {
+          final result = await getDataManager().checkHealth(server, service);
+          connection.onServiceChecked(service.id, result);
+        } catch (error) {
+          connection.onServiceChecked(
+            service.id,
+            HealthResult(HealthStatus.unhealthy, _describe(error)),
+          );
+        }
+      }
+    }
+
+    getDataManager().disconnect();
+    _running = false;
+    notifyListeners();
+    connection.onSweepFinished();
+  }
+
+  String _describe(Object error) {
+    final text = error.toString();
+    return text.length > 80 ? '${text.substring(0, 77)}…' : text;
+  }
+}