Test 21c45ba0ac feat: proper Copilot auth with OAuth device code flow and token validation ...

Builds on PR #1879's Copilot integration with critical auth improvements
modeled after opencode's implementation:

- Add hermes_cli/copilot_auth.py with:
  - OAuth device code flow (copilot_device_code_login) using the same
    client_id (Ov23li8tweQw6odWQebz) as opencode and Copilot CLI
  - Token type validation: reject classic PATs (ghp_*) with a clear
    error message explaining supported token types
  - Proper env var priority: COPILOT_GITHUB_TOKEN > GH_TOKEN > GITHUB_TOKEN
    (matching Copilot CLI documentation)
  - copilot_request_headers() with Openai-Intent, x-initiator, and
    Copilot-Vision-Request headers (matching opencode)

- Update auth.py:
  - PROVIDER_REGISTRY copilot entry uses correct env var order
  - _resolve_api_key_provider_secret delegates to copilot_auth for
    the copilot provider with proper token validation

- Update models.py:
  - copilot_default_headers() now includes Openai-Intent and x-initiator

- Update main.py:
  - _model_flow_copilot offers OAuth device code login when no token
    is found, with manual token entry as fallback
  - Shows supported vs unsupported token types

- 22 new tests covering token validation, env var priority, header
  generation, and integration with existing auth infrastructure

2026-03-18 03:25:58 -07:00

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