Update the chat message push mechanism to include group ID and group avatar
when sending messages in group conversations. This ensures that push
notifications for group chats display the group's identity and icon
rather than the sender's personal avatar.
- Update `PushChatMessage` interface and implementation to accept `groupID` and `groupAvatar`.
- Modify `chat_service.go` to extract group metadata and pass it to the push service.
- Update `push_service.go` to include group details in the push payload extras and set the notification icon to the group avatar for group conversations.
lan
d0852f0e78