luci-app-wireguard: dns ignored in generated config

Package Name

luci-app-wireguard

Maintainer

@EricLuehrsen

OpenWrt Version

25.12.5

OpenWrt Target/Subtarget

ipq40xx/generic

Steps to Reproduce

1. start from existing wgserver configuration
2. add peer
3. enter name
4. generate key pair
5. generate preshared key
6. enter allowed IPs, hitting "plus" after each one
7. tick "route" if appropriate
8. enter keepalive, if appropriate
9. save
10. re-enter peer definition, check all in order
11. click "configuration export"
12. add dns server, hitting "plus" after each one
13. note that the desired dns IS indeed displayed in the generated config
14. click to download the config

Actual Behaviour

the saved config does NOT have the dns entry, which is however visible in the onscreen config AND correctly present in the QR code

on a whim, I redid all the steps entering the DNS as /32 at the end, no changes: still no dns entry in the saved config.
saving the new peer and applying changes also does not fix the behaviour

Confirmation Checklist

• The package is maintained in this repository.
• I understand that issues related to the base OpenWrt repository or LuCI repository will be closed.
• I am reporting an issue for OpenWrt, not an unsupported fork.

Start in the luci-app-wireguard package and reproduce the configuration export/download flow described in the issue. Compare the onscreen configuration, QR code, and downloaded file after adding DNS servers; done means the downloaded configuration includes the same DNS entry shown in the other outputs.