Add path-scoped SignalR cookie repro with React Native client and Node server

[Copilot]

This repo now reproduces the case where the SignalR endpoint lives under a non-root base path (for example, https://my.domain/my/path) and the server sets two cookies with different path scopes. The React Native app shows which cookies make it through the HTTP priming request, SignalR negotiate request, and WebSocket connection.

• Node repro server

  • Added a minimal server under SignalRServer/ that exposes:
    • GET /my/path/status for cookie priming/reporting
    • POST /my/path/hub/negotiate for SignalR negotiation
    • GET /my/path/hub?id=... for the WebSocket transport
  • Sets:
    • a root-scoped cookie (Path=/)
    • a second cookie without Path on the priming route so the browser/client derives the path scope from /my/path
  • Returns the observed cookie header in both negotiate and WebSocket flows to make path behavior explicit
  • Avoids mutating cookie state on OPTIONS and hardens malformed WebSocket payload handling

• React Native repro client

  • Replaced the template screen with a focused repro UI in ReproducerApp/App.tsx
  • Accepts a base URL that already includes the API path
  • Primes cookies with fetch(..., { credentials: 'include' })
  • Connects to SignalR over WebSockets with withCredentials: true
  • Displays the computed /status and /hub URLs plus the server-side request reports

• Path handling

  • Added small URL helpers so the client consistently derives:
    • <base>/status
    • <base>/hub
  • Covers trailing slash and whitespace normalization without changing the requirement that the base URL already includes the API path

• Repo cleanup

  • Removed the template cleanup workflow/script so the repo-specific repro files are not overwritten after merge
  • Updated the README to describe the new server/client repro setup

Example of the path-based client configuration:

const connection = new HubConnectionBuilder()
  .withUrl('http://10.0.2.2:3000/my/path/hub', {
    transport: HttpTransportType.WebSockets,
    withCredentials: true,
  })
  .build();

Original prompt

i need node server and react native app that communicate thru signal-r and path of this api is including not only domain but also path https://my.domain -> not ok https://my.domain/my/path ->ok. this open api also needs to set cookies on all the requests one cookie is including path="/" and one does not