* fix: inline GitHub OAuth device flow in Connect GitHub modal
Previously, clicking "Connect GitHub repo" without a token would redirect
to Settings, forcing the user to authenticate there and then navigate back.
Now the device flow runs directly inside the GitHubVaultModal, showing the
user code and opening the browser inline.
- Extract GitHubDeviceFlow component from SettingsPanel (shared by both)
- Add onGitHubConnected prop to GitHubVaultModal for inline auth
- Update mock defaults to no-token state for testable device flow
- Add tests for inline device flow in modal
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* design: add GitHub OAuth fix wireframes
Three frames showing the fixed modal states:
1. Login button (inline device flow start)
2. Device code waiting (code + URL + spinner)
3. Error/expired state with retry
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Co-authored-by: Test <test@test.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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