Stufe 2 (#764): Huelle ClawdDotNet.Shell mit eingebettetem Chromium

Avalonia 11.3.17 + CefGlue.Next 152 in eigenem Ordner shell/. Startet den
Manager (ManagerStarter, nach Core gezogen), holt ueber den lokalen Socket
einen Einmal-Link und zeigt die WebUI angemeldet; Taskleistensymbol mit
Zustand. ClawdDotNet ohne Schalter startet die Huelle, sonst den Browser.
publish.py baut sie mit (--no-shell zum Weglassen), unter Linux mit den
Chromium-Ressourcen neben libcef.so. --selftest fuer die Pruefung ohne Blick.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/ClawdDotNet.Shell/ClawdDotNet.Shell.csproj

@@ -0,0 +1,50 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <!-- #764, stage 2: the shell - a window around the web interface, with a tray icon.
+
+       Its own program in its own folder (shell/ in the package), on purpose:
+       - Chromium (CefGlue.Next) is built against Avalonia 11.3; with Avalonia 12 it fails at
+         the first browser (TypeLoadException, tried 2026-10-02). Two Avalonia versions do not
+         fit into one output folder.
+       - The instance process is started once per instance by the manager and should load
+         neither Avalonia nor Chromium. -->
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <!-- The Chromium runtime package for Linux copies libcef & co. only for OutputType Exe; WinExe
+         makes no difference on Linux anyway, but skipped the copy when building for linux-x64. -->
+    <OutputType Condition="$(RuntimeIdentifier.StartsWith('linux'))">Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <RootNamespace>ClawdDotNet.Shell</RootNamespace>
+    <AssemblyName>ClawdDotNet.Shell</AssemblyName>
+    <ApplicationIcon>Assets\app.ico</ApplicationIcon>
+    <!-- Without it Windows refuses the child window that hosts Chromium
+         ("Unable to create child window for native control host"). -->
+    <ApplicationManifest>app.manifest</ApplicationManifest>
+    <!-- CefGlue would raise the stack size of the apphost with editbin from Visual Studio;
+         the build machine does not need Visual Studio for that, Chromium's own processes are
+         started from this same executable and run with the default. -->
+    <IsEditbinEnabled>false</IsEditbinEnabled>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Avalonia" Version="11.3.17" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.3.17" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.17" />
+    <!-- A slim Linux image often has no system font at all; the tray menu and the error text
+         need one. (The same reason the old desktop window shipped Barlow.) -->
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.3.17" />
+    <PackageReference Include="CefGlue.Next.Avalonia" Version="152.7977.831" />
+    <PackageReference Include="CefGlue.Next.BrowserProcess.Core" Version="152.7977.831" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <AvaloniaResource Include="Assets\**" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ClawdDotNet.Core\ClawdDotNet.Core.csproj" />
+  </ItemGroup>
+
+</Project>