The checks engine, the path and the cards: me-web? 0.1 reads the connection

MeWeb.Core runs seven checks concurrently and reports each as it settles:
online or behind a login page, this connection, the public IPv4 and IPv6
seen from v4./v6.meweb, the provider from a built-in map, the router
(UPnP IGD, NAT-PMP and PCP, read-only), address sharing (router WAN
against the echo, TTL hops only as a hint), and the history kept on the
device. The app draws the path from this device to the internet and lights
it node by node, with a card per check and a sheet listing every host it
contacts.

The provider map is iptoasn's table compressed to 2.1 MB by
tools/knowledge.cs and built before every app release; eleven Italian
provider profiles carry each fact with who said it, the source and the
month. The server gains a download page (en, it) and /download/{platform}
from the latest Gitea release.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB

src/MeWeb.App/App.axaml.cs

@@ -6,6 +6,7 @@ using Avalonia.Markup.Xaml;
 using MeWeb.App.Services;
 using MeWeb.App.ViewModels;
 using MeWeb.App.Views;
+using MeWeb.Core.Net;
 
 using Microsoft.Extensions.DependencyInjection;
 
@@ -15,6 +16,8 @@ public partial class App : Application
 {
   public static IServiceProvider Services { get; private set; }
 
+  public static IPlatform Platform { get; set; } = new SystemPlatform();
+
   public override void Initialize()
   {
     AvaloniaXamlLoader.Load(this);
@@ -25,7 +28,7 @@ public partial class App : Application
 
   public override void OnFrameworkInitializationCompleted()
   {
-    Services = new ServiceCollection().AddMeWebApp().BuildServiceProvider();
+    Services = new ServiceCollection().AddMeWebApp(Platform).BuildServiceProvider();
     var stored = AppSettings.Read();
     Localizer.Instance.SetLanguage(Languages.Find(stored.Language) ?? Languages.ForCulture(System.Globalization.CultureInfo.CurrentUICulture));