fix: replace deprecated getUserRoles method call with REST API

[deepak0x]

This PR fixes a 400 Bad Request error encountered when the application attempts to fetch user roles (specifically admin roles).

The previous implementation relied on a legacy Meteor method call (method.call/getUserRoles) via the DDP-over-REST endpoint. This method has been deprecated or removed in modern Rocket.Chat server versions, causing the API to return a 404 Method Not Found error (wrapped inside a 400 response).

This change updates the getUserRoles implementation to use the supported REST API endpoint roles.getUsersInRole, restoring compatibility with modern Rocket.Chat servers.

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Closes #1099

Changes

Updated packages/api/src/EmbeddedChatApi.ts:

• Replaced the legacy getUserRoles() implementation with a call to this.getUsersInRole("admin").

• Preserved the existing return structure ({ result: [...] }) to maintain backward compatibility with:

  • useFetchChatData
  • memberStore