me-web? skeleton: Avalonia 12 app, server, packaging and CI

The first screen (online or not, a Check button, every language with a
draft notice), the desktop and Android heads, the server's /api/info and
/api/ip, a release tool that builds deb, rpm, a Windows exe, macOS zips,
a signed APK and the server, and the Gitea workflows that run it. Rules
adapted from passolo; AGPL-3.0.

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

tools/Screenshots/Program.cs

@@ -0,0 +1,51 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Headless;
+using Avalonia.Media.Imaging;
+using Avalonia.Threading;
+
+using MeWeb.App;
+using MeWeb.App.Services;
+using MeWeb.App.ViewModels;
+using MeWeb.App.Views;
+
+using Microsoft.Extensions.DependencyInjection;
+
+var output = args.Length > 0 ? args[0] : Path.Combine("dist", "screenshots");
+var codes = args.Length > 1 ? args[1].Split(',', StringSplitOptions.RemoveEmptyEntries) : Languages.All.Select(l => l.Code).ToArray();
+Directory.CreateDirectory(output);
+
+var session = HeadlessUnitTestSession.StartNew(typeof(ScreenshotEntry));
+await session.Dispatch(() =>
+{
+  foreach (var (width, height, label) in new[] { (1100, 760, "desktop"), (400, 820, "phone") })
+  {
+    foreach (var code in codes)
+    {
+      Localizer.Instance.SetLanguage(Languages.Find(code) ?? Languages.Fallback);
+      var model = App.Services.GetRequiredService<MainViewModel>();
+      var window = new Window { Width = width, Height = height, Content = new MainView { DataContext = model } };
+      window.Show();
+      Dispatcher.UIThread.RunJobs();
+      var frame = window.CaptureRenderedFrame();
+      var path = Path.Combine(output, $"main-{label}-{code}.png");
+      if (frame is not null)
+      {
+        using var file = File.Create(path);
+        frame.Save(file, new PngBitmapEncoderOptions());
+      }
+      Console.WriteLine($"{path} {(frame is null ? "no frame" : "ok")}");
+      window.Close();
+    }
+  }
+}, CancellationToken.None);
+Environment.Exit(0);
+
+public static class ScreenshotEntry
+{
+  public static AppBuilder BuildAvaloniaApp() => AppBuilder.Configure<MeWeb.App.App>()
+      .UseSkia()
+      .UseHarfBuzz()
+      .WithInterFont()
+      .UseHeadless(new AvaloniaHeadlessPlatformOptions { UseHeadlessDrawing = false });
+}