Famous FB Messenger Floating Chat head UI developed in Flutter

Messenger Chat Head

Tried to clone the famous Chat Heads by Facebook Messenger using Flutter.

? Here's the Look

? Demo

? Issues

As far as I'm aware of what can be improved here:

• Make the Chat Head float even when the app is closed
• Chat Messages List starts from the top, it must start from the bottom as in real Messenger
• onDragEnd() while exiting the Chat Head can be improved for better Floating Location
• Inital Floating Location can be saved as the last Floating Location left by the user
• Appearing of Chat Head body can also be imporoved

GitHub

https://github.com/m-hamzashakeel/Messenger-Chat-Head-Flutter-UI