- Add backend route POST /api/ps/apikey/detect-models for model auto-detection with 1-hour caching
- Add backend route POST /api/ps/apikey/chat for proxying chat through user's own API credentials
- Update login page with API Key login section (API Base URL + API Key + model detection + model list)
- Update chat.js to support API Key mode with dynamic model usage (selected_model)
- Update styles for API Key login UI (detect status, model list, etc.)
- Add smoke tests for new endpoints and dev_id login backward compatibility
- Security: API Key stored only in sessionStorage, never persisted on backend
Co-authored-by: qinfendebingshuo <207279273+qinfendebingshuo@users.noreply.github.com>
copilot-swe-agent[bot]