* fix: resolve gpt-5-codex streaming response issue
- Add patch for @opeoginni/github-copilot-openai-compatible to fix text part ID mismatch
- Fix text-end event to use currentTextId instead of value.item.id for proper ID matching
- Add COPILOT_DEFAULT_HEADERS to OpenAI client for GitHub Copilot compatibility
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Co-Authored-By: Claude <noreply@anthropic.com>
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Co-authored-by: Claude <noreply@anthropic.com>
