fix: pass process.env to Bun.spawn() in spawnWithWindowsHide

[RuslanGainanov]

When Bun.spawn() is called without an env property, it creates a clean environment instead of inheriting from process.env. This causes proxy environment variables (HTTP_PROXY, HTTPS_PROXY, etc.) to be lost when spawning 'bun install' for plugin installation.

Fixes: fetch() proxy.url must be a non-empty string error when plugin auto-install runs behind a proxy.

Summary

Changes

Screenshots

Before	After

Testing

bun run typecheck
bun test

Related Issues

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Summary by cubic

Ensure spawned processes inherit the environment by default to avoid losing proxy variables. Pass process.env to Bun.spawn() (and Windows spawn) when env isn’t provided, fixing plugin auto-install behind proxies.

• Bug Fixes
  • Preserve HTTP_PROXY/HTTPS_PROXY so bun install works during plugin auto-install; resolves “fetch() proxy.url must be a non-empty string”.

^{Written for commit 3da9b5d. Summary will update on new commits.}

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[cubic-dev-ai]

No issues found across 1 file

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Auto-approved: The fix correctly restores environment inheritance for spawned processes, which is the expected behavior in Node.js and avoids losing proxy settings. Low risk change.}

[RuslanGainanov]

I have read the CLA Document and I hereby sign the CLA