Can not access container ports through VirtuioProxy

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### Windows Version

Microsoft Windows [版本 10.0.26100.32690]

### WSL Version

WSL 版本: 2.7.3.0 内核版本: 6.6.114.1-1 WSLg 版本: 1.0.73 MSRDC 版本: 1.2.6676 Direct3D 版本: 1.611.1-81528511 DXCore 版本: 10.0.26100.1-240331-1435.ge-release Windows: 10.0.26100.32690

### Are you using WSL 1 or WSL 2?

- [x] WSL 2
- [ ] WSL 1

### Kernel Version

默认分发: Ubuntu-24.04 默认版本: 2

### Distro Version

_No response_

### Other Software

docker desktop 4.73.0

### Repro Steps

Open wsl with Virtuproxy, docker desktop, access localhost::19011 will meet ERR_CONNECTION_RESET and will meet 503 error at not same LAN net machine test . But the NAT Net mode is fine.

### Expected Behavior

Virtuproxy should work properly.

### Actual Behavior

The NAT net mode wsl2 host not support IPv6 but docker desktop IPv6 settings is work fine.

> wsluser@Desktop:~$ ping -6 2603:1040:404:f::a
> ping: connect: Network is unreachable

### Diagnostic Logs

[WslLogs-2026-05-12_17-32-07.tar.gz](https://github.com/user-attachments/files/27630678/WslLogs-2026-05-12_17-32-07.tar.gz)

Start by reviewing the attached WslLogs-2026-05-12_17-32-07.tar.gz and reproducing the issue with WSL 2, Ubuntu 24.04, Docker Desktop 4.73.0, and VirtuioProxy. Compare localhost and public-IP container access in VirtuProxy mode with NAT mode, focusing on the reported IPv6 network-unreachable behavior. Done means container ports work through VirtuioProxy without connection resets or 503 errors.

Written by the indexing model from the issue text.