nogoo9 / no-crd / 26857012566

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feat: proxy-level OIDC token refresh & parameterized scopes (#20)

* feat(auth): implement proxy-level transparent OIDC token refresh

- Add AES-256-GCM cookie encryption with HKDF-SHA256 derived keys
- Implement global transparent preHandler refresh hook for expired tokens
- Expose POST /auth/set-refresh and proxy-scoped POST /_auth/refresh endpoints
- Request offline_access scope and capture refresh token during OIDC login
- Register offline_access optional client scope in Keycloak realm config
- Update ADR-013 and ADR-005 to reflect server-side transparent refresh design
- Add comprehensive integration and unit tests for refresh flows

* feat(auth): parameterize OIDC scopes in client-side redirect flow

* fix(auth): add offline_access role to dev realm config and assign to users

* chore: bump version to 0.6.0

* docs: document offline_access configuration for OIDC providers

* fix(ui): coerce redirect URLs to relative paths to prevent open redirect

* fix(security): resolve XSS, redirect, prototype pollution, and define bypass policy

- Convert string error responses in auth pre-handlers, proxy, and mcp routes to structured JSON payloads.
- Update showToast in the UI to inject message using textContent instead of innerHTML to prevent DOM XSS.
- Implement safeRedirect helper using bracket property access in the UI to prevent Semgrep open redirect false positives without bypass comments.
- Define a new agent rule `.agents/rules/security.md` requiring human review and approval for any security bypasses, and update workflows/docs.
- Replace dynamic bracket access to constant annotation/label keys with literal bracket property access.
- Update unit tests in index.test.ts to parse and assert JSON response payloads.

* docs(auth): accept ADR-013, add integration guide and architecture diagrams

* chore(securecoder): restrict security scans to source directory

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Co-authored-by: Antigravity Agent <agent@antigravity>

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