[Bugs] mac app cannot load system proxy

### Short summary

app cannot load proxy at macos, i have to open app by terminal shell: open -a "GitHub Copilot"

### Affected version or release

v0.2.7

### Installation context

_No response_

### What happened?

app cannot load proxy at macos, i have to open app by terminal shell: open -a "GitHub Copilot", just open app directly i could auth cause our company need proxy to assess github enterprise.

### Steps to reproduce

_No response_

### Expected behavior

Can load system proxy or shell proxy, when open the app by click app icon.

### Additional context

_No response_

Start by reproducing the issue on macOS v0.2.7 with the company proxy, comparing a direct app-icon launch with `open -a "GitHub Copilot"` from a terminal. Done means the app loads the system or shell proxy and allows authentication when launched directly.

Written by the indexing model from the issue text.