[AspireE2E] When running an Aspire project in VS Code, the GitHub Copilot chat in the Dashboard is showing an error.

**REGRESSION INFO**: Not repro on previous Aspire version 13.2.0

**INSTALL STEPS**

1. Clean machine: Windows x64 25h2
2. Install SDK 10.0.201
3. Install VS Code Insiders - 1.113.0
- Install Feb Prerelease 3 (RC) C# DK 2.13.9 [include March prerelease (03/18)C# 2.131.79].
4. Add feed
5. dotnet new install Aspire.ProjectTemplates::13.2.0 --force

**REPRO STEPS**

1. Open VS Code, create .NET Project > Aspire Starter App (ASP.NET Core/Blazor) > Create
2. Right click the AppHost project > Debug > Start New Instance
3. On Dashboard page > Open "GitHub Copilot Chat" > send request

**NOTE**: This issue not repro when creating and running a project in Visual Studio using the same version of Aspire.

**Actual Result**
Error when sending request

```
fail: Aspire.Hosting.Dashboard.Microsoft.Extensions.AI.LoggingChatClient[1784604714]
GetStreamingResponseAsync failed.
System.Net.Http.HttpIOException: The response ended prematurely. (ResponseEnded)
at System.Net.Http.HttpConnection.FillAsync(Boolean async)
at System.Net.Http.HttpConnection.ChunkedEncodingReadStream.ReadAsyncCore(Memory`1 buffer, CancellationToken cancellationToken)
at System.ClientModel.Internal.ReadTimeoutStream.ReadAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)
at System.Net.ServerSentEvents.SseParser`1.FillLineBufferAsync(CancellationToken cancellationToken)
at System.Net.ServerSentEvents.SseParser`1.EnumerateAsync(CancellationToken cancellationToken)+MoveNext()
at OpenAI.AsyncSseUpdateCollection`1.AsyncSseUpdateEnumerator`1.System.Collections.Generic.IAsyncEnumerator.MoveNextAsync()
2
at OpenAI.AsyncSseUpdateCollection`1.GetValuesFromPageAsync(ClientResult page)+MoveNext()
at OpenAI.AsyncSseUpdateCollection`1.GetValuesFromPageAsync(ClientResult page)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
3
at System.ClientModel.AsyncCollectionResult`1.GetAsyncEnumerator(CancellationToken cancellationToken)+MoveNext()
at System.ClientModel.AsyncCollectionResult`1.GetAsyncEnumerator(CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
2
at Microsoft.Extensions.AI.OpenAIChatClient.FromOpenAIStreamingChatCompletionAsync(IAsyncEnumerable`1 updates, ChatCompletionOptions options, CancellationToken cancellationToken)+MoveNext()
at Microsoft.Extensions.AI.OpenAIChatClient.FromOpenAIStreamingChatCompletionAsync(IAsyncEnumerable`1 updates, ChatCompletionOptions options, CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
at Microsoft.Extensions.AI.LoggingChatClient.GetStreamingResponseAsync(IEnumerable`1 messages, ChatOptions options, CancellationToken cancellationToken)+MoveNext()
Aspire.Hosting.Dashboard.Microsoft.Extensions.AI.LoggingChatClient: Error: GetStreamingResponseAsync failed.
System.Net.Http.HttpIOException: The response ended prematurely. (ResponseEnded)
at System.Net.Http.HttpConnection.FillAsync(Boolean async)
at System.Net.Http.HttpConnection.ChunkedEncodingReadStream.ReadAsyncCore(Memory`1 buffer, CancellationToken cancellationToken)
at System.ClientModel.Internal.ReadTimeoutStream.ReadAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)
at System.Net.ServerSentEvents.SseParser`1.FillLineBufferAsync(CancellationToken cancellationToken)
at System.Net.ServerSentEvents.SseParser`1.EnumerateAsync(CancellationToken cancellationToken)+MoveNext()
at OpenAI.AsyncSseUpdateCollection`1.AsyncSseUpdateEnumerator`1.System.Collections.Generic.IAsyncEnumerator.MoveNextAsync()
2
at OpenAI.AsyncSseUpdateCollection`1.GetValuesFromPageAsync(ClientResult page)+MoveNext()
at OpenAI.AsyncSseUpdateCollection`1.GetValuesFromPageAsync(ClientResult page)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
3
at System.ClientModel.AsyncCollectionResult`1.GetAsyncEnumerator(CancellationToken cancellationToken)+MoveNext()
at System.ClientModel.AsyncCollectionResult`1.GetAsyncEnumerator(CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
2
at Microsoft.Extensions.AI.OpenAIChatClient.FromOpenAIStreamingChatCompletionAsync(IAsyncEnumerable`1 updates, ChatCompletionOptions options, CancellationToken cancellationToken)+MoveNext()
at Microsoft.Extensions.AI.OpenAIChatClient.FromOpenAIStreamingChatCompletionAsync(IAsyncEnumerable`1 updates, ChatCompletionOptions options, CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
at Microsoft.Extensions.AI.LoggingChatClient.GetStreamingResponseAsync(IEnumerable`1 messages, ChatOptions options, CancellationToken cancellationToken)+MoveNext()
fail: Aspire.Hosting.Dashboard.Model.Assistant.AssistantChatViewModel[0]
Error getting response.
System.Net.Http.HttpIOException: The response ended prematurely. (ResponseEnded)
at System.Net.Http.HttpConnection.FillAsync(Boolean async)
at System.Net.Http.HttpConnection.ChunkedEncodingReadStream.ReadAsyncCore(Memory`1 buffer, CancellationToken cancellationToken)
at System.ClientModel.Internal.ReadTimeoutStream.ReadAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)
at System.Net.ServerSentEvents.SseParser`1.FillLineBufferAsync(CancellationToken cancellationToken)
at System.Net.ServerSentEvents.SseParser`1.EnumerateAsync(CancellationToken cancellationToken)+MoveNext()
at OpenAI.AsyncSseUpdateCollection`1.AsyncSseUpdateEnumerator`1.System.Collections.Generic.IAsyncEnumerator.MoveNextAsync()
2
at OpenAI.AsyncSseUpdateCollection`1.GetValuesFromPageAsync(ClientResult page)+MoveNext()
at OpenAI.AsyncSseUpdateCollection`1.GetValuesFromPageAsync(ClientResult page)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
3
at System.ClientModel.AsyncCollectionResult`1.GetAsyncEnumerator(CancellationToken cancellationToken)+MoveNext()
at System.ClientModel.AsyncCollectionResult`1.GetAsyncEnumerator(CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
2
at Microsoft.Extensions.AI.OpenAIChatClient.FromOpenAIStreamingChatCompletionAsync(IAsyncEnumerable`1 updates, ChatCompletionOptions options, CancellationToken cancellationToken)+MoveNext()
at Microsoft.Extensions.AI.OpenAIChatClient.FromOpenAIStreamingChatCompletionAsync(IAsyncEnumerable`1 updates, ChatCompletionOptions options, CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
2
at Microsoft.Extensions.AI.LoggingChatClient.GetStreamingResponseAsync(IEnumerable`1 messages, ChatOptions options, CancellationToken cancellationToken)+MoveNext()
at Microsoft.Extensions.AI.LoggingChatClient.GetStreamingResponseAsync(IEnumerable`1 messages, ChatOptions options, CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
2
at Microsoft.Extensions.AI.FunctionInvokingChatClient.GetStreamingResponseAsync(IEnumerable`1 messages, ChatOptions options, CancellationToken cancellationToken)+MoveNext()
at Microsoft.Extensions.AI.FunctionInvokingChatClient.GetStreamingResponseAsync(IEnumerable`1 messages, ChatOptions options, CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
2
at Aspire.Dashboard.Model.Assistant.AIHelpers.ExecuteStreamingCallAsync(IChatClient client, List`1 chatMessages, Func`2 textUpdateCallback, Func`2 onMessageCallback, Int32 maximumResponseLength, AIFunction[] tools, CancellationTokenSource responseCts) in /_/src/Aspire.Dashboard/Model/Assistant/AIHelpers.cs:line 320
at Aspire.Dashboard.Model.Assistant.AssistantChatViewModel.CallServiceCoreAsync(CancellationTokenSource responseCts) in /_/src/Aspire.Dashboard/Model/Assistant/AssistantChatViewModel.cs:line 526
Aspire.Hosting.Dashboard.Model.Assistant.AssistantChatViewModel: Error: Error getting response.
System.Net.Http.HttpIOException: The response ended prematurely. (ResponseEnded)
at System.Net.Http.HttpConnection.FillAsync(Boolean async)
at System.Net.Http.HttpConnection.ChunkedEncodingReadStream.ReadAsyncCore(Memory`1 buffer, CancellationToken cancellationToken)
at System.ClientModel.Internal.ReadTimeoutStream.ReadAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)
at System.Net.ServerSentEvents.SseParser`1.FillLineBufferAsync(CancellationToken cancellationToken)
at System.Net.ServerSentEvents.SseParser`1.EnumerateAsync(CancellationToken cancellationToken)+MoveNext()
at OpenAI.AsyncSseUpdateCollection`1.AsyncSseUpdateEnumerator`1.System.Collections.Generic.IAsyncEnumerator.MoveNextAsync()
2
at OpenAI.AsyncSseUpdateCollection`1.GetValuesFromPageAsync(ClientResult page)+MoveNext()
at OpenAI.AsyncSseUpdateCollection`1.GetValuesFromPageAsync(ClientResult page)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
3
at System.ClientModel.AsyncCollectionResult`1.GetAsyncEnumerator(CancellationToken cancellationToken)+MoveNext()
at System.ClientModel.AsyncCollectionResult`1.GetAsyncEnumerator(CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
2
at Microsoft.Extensions.AI.OpenAIChatClient.FromOpenAIStreamingChatCompletionAsync(IAsyncEnumerable`1 updates, ChatCompletionOptions options, CancellationToken cancellationToken)+MoveNext()
at Microsoft.Extensions.AI.OpenAIChatClient.FromOpenAIStreamingChatCompletionAsync(IAsyncEnumerable`1 updates, ChatCompletionOptions options, CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
2
at Microsoft.Extensions.AI.LoggingChatClient.GetStreamingResponseAsync(IEnumerable`1 messages, ChatOptions options, CancellationToken cancellationToken)+MoveNext()
at Microsoft.Extensions.AI.LoggingChatClient.GetStreamingResponseAsync(IEnumerable`1 messages, ChatOptions options, CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
2
at Microsoft.Extensions.AI.FunctionInvokingChatClient.GetStreamingResponseAsync(IEnumerable`1 messages, ChatOptions options, CancellationToken cancellationToken)+MoveNext()
at Microsoft.Extensions.AI.FunctionInvokingChatClient.GetStreamingResponseAsync(IEnumerable`1 messages, ChatOptions options, CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource.GetResult()
2
at Aspire.Dashboard.Model.Assistant.AIHelpers.ExecuteStreamingCallAsync(IChatClient client, List`1 chatMessages, Func`2 textUpdateCallback, Func`2 onMessageCallback, Int32 maximumResponseLength, AIFunction[] tools, CancellationTokenSource responseCts) in /_/src/Aspire.Dashboard/Model/Assistant/AIHelpers.cs:line 320
at Aspire.Dashboard.Model.Assistant.AssistantChatViewModel.CallServiceCoreAsync(CancellationTokenSource responseCts) in /_/src/Aspire.Dashboard/Model/Assistant/AssistantChatViewModel.cs:line 526
```