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

src/MeWeb.Shared/Endpoints.cs

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+namespace MeWeb.Shared;
+
+public static class Endpoints
+{
+  public const string Host = "meweb.arasaka.software";
+  public const string HostV4 = "v4.meweb.arasaka.software";
+  public const string HostV6 = "v6.meweb.arasaka.software";
+
+  public static string Base => $"https://{Host}";
+  public static string BaseV4 => $"https://{HostV4}";
+  public static string BaseV6 => $"https://{HostV6}";
+
+  public const string Api = "/api";
+
+  public static class Server
+  {
+    public const string GET_Info = $"{Api}/info";
+    public const string GET_Ip = $"{Api}/ip";
+  }
+
+  public static class Downloads
+  {
+    public const string GET_Platform = "/download/{platform}";
+
+    public static string GET_M_Platform(string platform) => $"/download/{platform}";
+  }
+}

src/MeWeb.Shared/MeWeb.Shared.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <RootNamespace>MeWeb.Shared</RootNamespace>
+    <BuildCommit Condition="'$(BuildCommit)' == ''">dev</BuildCommit>
+    <BuildTimeUtc Condition="'$(BuildTimeUtc)' == ''">2000-01-01T00:00:00Z</BuildTimeUtc>
+  </PropertyGroup>
+
+  <Target Name="GenerateBuildInfo" BeforeTargets="BeforeCompile">
+    <PropertyGroup>
+      <BuildInfoPath>$(IntermediateOutputPath)BuildInfo.g.cs</BuildInfoPath>
+    </PropertyGroup>
+    <ItemGroup>
+      <BuildInfoLine Include="namespace MeWeb.Shared%3B" />
+      <BuildInfoLine Include="public static class BuildInfo" />
+      <BuildInfoLine Include="{" />
+      <BuildInfoLine Include="  public const string Version = &quot;$(Version)&quot;%3B" />
+      <BuildInfoLine Include="  public const string Commit = &quot;$(BuildCommit)&quot;%3B" />
+      <BuildInfoLine Include="  public const string BuiltAt = &quot;$(BuildTimeUtc)&quot;%3B" />
+      <BuildInfoLine Include="}" />
+    </ItemGroup>
+    <WriteLinesToFile File="$(BuildInfoPath)" Lines="@(BuildInfoLine)" Overwrite="true" WriteOnlyWhenDifferent="true" />
+    <ItemGroup>
+      <Compile Include="$(BuildInfoPath)" />
+      <FileWrites Include="$(BuildInfoPath)" />
+    </ItemGroup>
+  </Target>
+</Project>

src/MeWeb.Shared/MeWebJsonContext.cs

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+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace MeWeb.Shared;
+
+[JsonSourceGenerationOptions(JsonSerializerDefaults.Web)]
+[JsonSerializable(typeof(ViewInfo))]
+[JsonSerializable(typeof(ViewIp))]
+public partial class MeWebJsonContext : JsonSerializerContext
+{
+}

src/MeWeb.Shared/ServerContracts.cs

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+namespace MeWeb.Shared;
+
+public class ViewInfo
+{
+  public string Version { get; set; }
+  public string Commit { get; set; }
+  public string BuiltAt { get; set; }
+}
+
+public class ViewIp
+{
+  public string Address { get; set; }
+  public string Family { get; set; }
+}