Add backend.oidc.iosRedirectUri (default: timetracker://oauth/callback) and
backend.jwt.secret to values.yaml and wire them into the backend deployment
as OIDC_IOS_REDIRECT_URI and JWT_SECRET env vars. Update NOTES.txt to surface
both values post-install.
GET /clients and GET /projects return bare arrays, not wrapped objects.
Remove ClientListResponse and ProjectListResponse wrapper structs and
update ClientsViewModel, ProjectsViewModel, and TimerViewModel to decode
[Client] and [Project] directly.
Keychain writes silently failed (missing keychain-access-groups entitlement
on simulator), causing the token to disappear between handleTokenResponse
and the first API call. The in-memory cache ensures the token is always
available within the session; the keychain still persists it across launches
when entitlements allow.
iOS clients now exchange the OIDC authorization code for a backend-signed
HS256 JWT via POST /auth/token. All subsequent API requests authenticate
using this JWT as a Bearer token, verified locally — no per-request IDP
call is needed. Web frontend session-cookie auth is unchanged.
