Adds enable-media-stream CEF flag to allow getUserMedia() API

Enables native browser camera/microphone access in web widgets

Fixes community request for webcam support in web page widgets

Summary

Enables webcam and microphone access in CEF browser for web page widgets.

Problem

Currently, Xibo Player blocks navigator.mediaDevices.getUserMedia() calls, preventing webcam/microphone access in web widgets. This has been requested by the community.

Solution

Added the enable-media-stream CEF command line flag, which automatically grants media permissions.

Changes

• One line added to MainWindow.xaml.cs (line 371)
• Adds settings.CefCommandLineArgs["enable-media-stream"] = "1";

Testing

• Tested with web page widget using getUserMedia()
• Camera/microphone access works without permission dialogs
• No breaking changes to existing functionality

References

• Community discussion: https://community.xibo.org.uk/t/webcam-and-microphone-permissions-in-web-plugin/28203
• CefSharp documentation: https://cefsharp.github.io/api/109.1.x/html/M_CefSharp_IPermissionHandler_OnRequestMediaAccessPermission.htm