//! Shared auth modules (wasm32-compatible, pure logic).
// Feature 08: Auth Manager
// Feature 04: Upstream auth session store
// Feature 03: OIDC Discovery
// Feature 03: Unified Upstream OIDC/OAuth2 Client
// Feature 06: Token Introspection
// Feature 02: JWKS Manager
// PBKDF2-HMAC-SHA256 + Argon2id password hashing
// Feature 01/03: Upstream provider models (cross-platform, pure serde)
// Feature 04: UserInfo Client