KNI spike: engine core + Friflo render via WebGL in the browser

spikes/KniWeb (outside LittleSim.sln): a kni-blazor-gl template project
(KNI 4.2.9001, net8.0) referencing MrGameEng.Core directly. A mini-host
in the GameHost mold drives EngineContext/GameClock/Scene phases over
KNI's Game; the scene moves 300 Friflo entities in the update phase and
draws them with SpriteBatch (WebGL). Verified in a real browser: sprites
render and animate, browser console is clean.

Decision (docs/web-client.md): path A — KNI — is the primary route for
the web client; the core runs in Blazor WASM unchanged thanks to the
Core/Host split. Known follow-ups: per-platform compilation of the
graphics libraries against nkast.* packages, shader compatibility for
Renderer2D, HTTP-served content instead of the filesystem.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

spikes/KniWeb/KniWebSpike.csproj

@@ -0,0 +1,61 @@
+<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">
+
+  <PropertyGroup>
+    <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>disable</Nullable>
+    <ImplicitUsings>disable</ImplicitUsings>
+    <RootNamespace>KniWebSpike</RootNamespace>
+    <AssemblyName>KniWebSpike</AssemblyName>
+    <DefineConstants>$(DefineConstants);BLAZORGL</DefineConstants>
+	<KniPlatform>BlazorGL</KniPlatform>
+  </PropertyGroup>
+  
+  <PropertyGroup>
+    <BlazorEnableTimeZoneSupport>false</BlazorEnableTimeZoneSupport>
+    <!--<InvariantGlobalization>true</InvariantGlobalization>-->
+  </PropertyGroup>
+
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+  </PropertyGroup>
+
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Include="Pages\Index.razor.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="KniWebSpikeGame.cs" />
+    <Compile Include="SpikeScene.cs" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <!-- Суть спайка: платформо-независимое ядро движка + Friflo внутри Blazor WASM. -->
+    <ProjectReference Include="..\..\engine\src\MrGameEng.Core\MrGameEng.Core.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="nkast.Xna.Framework" Version="4.2.9001" />
+    <PackageReference Include="nkast.Xna.Framework.Content" Version="4.2.9001" />
+    <PackageReference Include="nkast.Xna.Framework.Graphics" Version="4.2.9001" />
+    <PackageReference Include="nkast.Xna.Framework.Audio" Version="4.2.9001" />
+    <PackageReference Include="nkast.Xna.Framework.Media" Version="4.2.9001" />
+    <PackageReference Include="nkast.Xna.Framework.Input" Version="4.2.9001" />
+    <PackageReference Include="nkast.Xna.Framework.Game" Version="4.2.9001" />
+    <PackageReference Include="nkast.Xna.Framework.Devices" Version="4.2.9001" />
+    <PackageReference Include="nkast.Xna.Framework.Storage" Version="4.2.9001" />
+    <PackageReference Include="nkast.Xna.Framework.XR" Version="4.2.9001" />
+    <PackageReference Include="nkast.Kni.Platform.Blazor.GL" Version="4.2.9001.2" />
+    <PackageReference Include="nkast.Xna.Framework.Content.Pipeline.Builder" Version="4.2.9001" />
+  </ItemGroup>
+
+  <ItemGroup Condition=" '$(TargetFramework)' == 'net8.0' ">
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="8.0.17" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="8.0.17" PrivateAssets="all" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <KniContentReference Include="Content\KniWebSpikeContent.mgcb" />
+  </ItemGroup>
+
+</Project>