fix

[Forsakenrox]

Related GitHub Issue

Closes: # 1407

Description

This PR fixes the TypeError: terminated / UND_ERR_BODY_TIMEOUT error that occurs when OpenAI-compatible provider requests run longer than 5 minutes (e.g., when the agent writes directly to a file, generating long tool calls, or reasoning chains with large models like Qwen3.8 27B).
VS Code bundles its own internal version of undici with a hardcoded 300-second bodyTimeout default. This silently overrides the user-configured apiRequestTimeout (default 600s) at the Node.js fetch layer, causing requests to be forcefully terminated after exactly 5 minutes of idle body streaming.

Test Procedure

Manual testing:

1. Launch a local OpenAI-compatible inference server (LM Studio, Ollama, or vLLM).
2. Load a large model (e.g., Qwen3.8 27B Q8 on an A100 40GB, or any model slow enough on consumer hardware).
3. Configure Zoo Code to use the local endpoint.
4. Send a prompt that forces long processing time — specifically one instructing the agent to write directly to a file (bypassing the standard streaming UI).
5. Verify that the request does not fail at ~300 seconds and instead continues streaming until completion (or up to the configured apiRequestTimeout of 600s).

Pre-Submission Checklist

• Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
• Scope: My changes are focused on the linked issue (one major feature/fix per PR).
• Self-Review: I have performed a thorough self-review of my code.
• Testing: New and/or updated tests have been added to cover my changes (if applicable).
• Visual Snapshot (UI changes only): If a user would notice this change at a glance (layout, theme tokens, brand elements, empty/error states), I've added or updated a *.visual.tsx snapshot in webview-ui/. See webview-ui/AGENTS.md → "When a UI change needs a snapshot".
• Documentation Impact: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
• Contribution Guidelines: I have read and agree to the Contributor Guidelines.

Documentation Updates

Does this PR necessitate updates to user-facing documentation?

• No documentation updates are required.

Additional Notes

• The resolveTimeoutMs() helper ensures backward compatibility: if the setting is unset or 0, we fall back to DEFAULT_TIMEOUT_MS rather than letting the OpenAI SDK/undici use their own defaults.
• This fix applies to all OpenAI-compatible providers (not just LM Studio) since they share the same base client initialization path in openai.ts.

Summary by CodeRabbit

• Bug Fixes
  • Improved connectivity handling for OpenAI requests by using a consistent network transport.
  • Ensured custom connection settings are applied reliably to OpenAI requests.
  • Requests configured with no timeout continue to support extended or uninterrupted operation.
  • Improved reliability for requests that use custom connection settings and longer-running operations.

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