Console UI does not reflect KVM disconnect after AMT closes idle session (~3 minutes inactivity)

[graikhel-intel]

When a KVM session is left idle, Intel AMT automatically closes the connection after about 3 minutes of inactivity. However, Console UI continues to show the KVM session as active and does not reflect that the connection has been closed. This creates a misleading state where the UI indicates the session is still connected even though AMT has already terminated it.

Steps to Reproduce

1. Connect to a device using KVM via Console.
2. Once connected, do not move the mouse cursor or type anything.
3. Wait approximately 3 minutes.
4. Observe that AMT closes the KVM session, but Console UI still shows the connection as active.

Console Details

• OS: Windows
• Browser: Chrome
• Version: v1.21.3

AMT Device Details

• AMT v 18.x and 16.x
• Windows

[nmgaston]

Suggestions from Ganesh:

• Show a black screen
• Default back to 'Connect KVM'
• Reset all KVM related properties in the Browser
• Make sure the WSS connection from Browser to Console is closed

[nmgaston]

Fix made to both console and sample-web-ui:

• fix(devices): show Connect button after disconnect and refresh auth token on reconnect sample-web-ui#3159
• fix(kvm): close browser websocket immediately on AMT disconnect #820