20b1e04764
- Added error handling for call invite and answer processes to differentiate between callee offline and call already answered scenarios. - Introduced a new method to publish messages only to online users, improving real-time communication during call signaling. - Updated call service to check callee's online status before sending call invites, ensuring better user experience. - Enhanced call acceptance logic to notify both caller and callee about call status changes, including when a call is answered on another device.