Add a composition-root test that builds the provider with ValidateOnBuild to catch missing registrations (without touching the real hardware monitor), plus per-service registration assertions. Add a MainWindowViewModel test that constructs the view model entirely from faked IHardwareMonitorService/ILogger/IRemoteWebServer, proving the testability win. To make that possible, inject the UI DispatcherQueue (captured on the UI thread by the composition factory) instead of calling the static DispatcherQueue.GetForCurrentThread() in the view-model constructor, which threw in the headless test host; the tree-rebuild marshalling now treats a null dispatcher as direct invocation.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Build the Microsoft.Extensions.DependencyInjection provider in App and resolve the view model and runtime factory from it, replacing the manual new MainWindow(trace) path. MainWindow now takes an injected ctor (view model, tracer, runtime factory, provider); window-tied services are produced by MainWindowRuntimeFactory once the window exists. On real shutdown MainWindow_Closed disposes the provider (which disposes the view model first, then domain services and tracer), while the minimize-to-tray branch returns before any teardown.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
JMR-devandCopilot