feat(ui): Implement Blazor WASM UI for ClawSharp Phase 3 (Tasks 3.7-3.11)

- Create Blazor WASM UI with Chat, Dashboard, Memory Browser, and Settings pages
- Chat page connects to SignalR hub at /hubs/agent, sends messages, shows responses
- Dashboard page shows provider status and channel status
- Memory Browser page allows browsing and searching memories
- Settings page provides basic configuration UI
- Self-host Blazor from Gateway: add UseBlazorFrameworkFiles() and MapFallbackToFile()
- Add memory endpoints to Gateway for UI integration
- Fix SlackChannel AllowedChannels property in config

Author: smartprogrammer93

ClawSharp.slnx

@@ -13,6 +13,7 @@
   </Folder>
   <Folder Name="/tests/">
     <Project Path="tests/ClawSharp.Agent.Tests/ClawSharp.Agent.Tests.csproj" />
+    <Project Path="tests/ClawSharp.Channels.Tests/ClawSharp.Channels.Tests.csproj" />
     <Project Path="tests/ClawSharp.Cli.Tests/ClawSharp.Cli.Tests.csproj" />
     <Project Path="tests/ClawSharp.Core.Tests/ClawSharp.Core.Tests.csproj" />
     <Project Path="tests/ClawSharp.Gateway.Tests/ClawSharp.Gateway.Tests.csproj" />
@@ -21,5 +22,6 @@
     <Project Path="tests/ClawSharp.Providers.Tests/ClawSharp.Providers.Tests.csproj" />
     <Project Path="tests/ClawSharp.Tools.Tests/ClawSharp.Tools.Tests.csproj" />
     <Project Path="tests/ClawSharp.TestHelpers/ClawSharp.TestHelpers.csproj" />
+    <Project Path="tests/ClawSharp.UI.Tests/ClawSharp.UI.Tests.csproj" />
   </Folder>
 </Solution>

src/ClawSharp.Channels/ClawSharp.Channels.csproj

@@ -10,6 +10,7 @@
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.3" />
     <PackageReference Include="Telegram.Bot" Version="22.0.0" />
     <PackageReference Include="Discord.Net" Version="3.17.0" />
+    <PackageReference Include="SlackNet" Version="0.9.0" />
   </ItemGroup>
 
   <ItemGroup>

src/ClawSharp.Core/Config/ChannelsConfig.cs

@@ -26,4 +26,5 @@ public class SlackChannelConfig
     public string? BotToken { get; set; }
     public string? AppToken { get; set; }
     public string? SigningSecret { get; set; }
+    public List<string> AllowedChannels { get; set; } = [];
 }

src/ClawSharp.Gateway/ClawSharp.Gateway.csproj

@@ -6,6 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.Server" Version="10.0.3" />
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.3" />
   </ItemGroup>
 
@@ -14,6 +15,7 @@
     <ProjectReference Include="..\ClawSharp.Channels\ClawSharp.Channels.csproj" />
     <ProjectReference Include="..\ClawSharp.Core\ClawSharp.Core.csproj" />
     <ProjectReference Include="..\ClawSharp.Infrastructure\ClawSharp.Infrastructure.csproj" />
+    <ProjectReference Include="..\ClawSharp.UI\ClawSharp.UI.csproj" />
   </ItemGroup>
 
 </Project>