Port link broken when using `appPort`

• VSCode Version: 1.105.0
• Local OS Version: Windows 11 25H2
• Remote OS Version: Ubuntu 24.04.3 LTS
• Remote Extension/Connection Type: Dev Containers
• Logs: N/A

Steps to Reproduce:

1. Clone https://github.com/home-assistant/core. The relevant section looks like:

   {
     "appPort": ["8123:8123"]
   }
   

2. Reopen in the devcontainer

3. Check ports tab:

   

If you try to copy the link, it yields [::1]:8123, which may seem to indicate that the port is exposed to 0.0.0.0 (not sure). Regardless, it's a broken and useless link. Clicking the Open in browser button will try opening the same in browsers, which won't work.

I would have expected these to be translated to something like localhost:8123.

Note that appPort cannot be refactored into forwardPorts because of:

1. https://github.com/devcontainers/spec/issues/643
2. https://github.com/home-assistant/core/pull/154099/files#r2417724273

Does this issue occur when you try this locally?: N/A
Does this issue occur when you try this locally and all extensions are disabled?: Yes

This is related to https://github.com/microsoft/vscode-remote-release/issues/11253.