Replace the manual session-cookie interceptor in ApiClient and the
manual cookie branch in TokenRefreshAuthenticator with a shared
PersistentCookieJar backed by an encrypted, per-server EncryptedCookieStore.
- Add CookieStore iface + EncryptedCookieStore (EncryptedSharedPreferences,
per-server scope, legacy single-cookie migration)
- Add CookieSerialization (OkHttp Cookie <-> holder) + PersistentCookieJar
(in-mem cache, async persist, atomic useStore scope switching, prune,
session-cookie accessor)
- Add CookieManager coordinator (init/useStore/prune/clear) and wire its
cookieJar into OkHttpProvider base/websocket/probe (lazy)
- AuthManager.get/setSessionCookie now delegate to CookieManager; add
pruneServerCache(); clear path drops the scope's session cookie
- AuthLoginViewModel + HermesWsClient rely on the jar for Set-Cookie capture
and session-cookie re-attachment (no manual header injection)
- Add fakes (FakeEncryptedCookieStore/buildFakePersistentCookieJar) + unit
tests (PersistentCookieJarTest, CookieManagerTest); inject fake jar into
ApiClientTest/HermesWsClientTest setup
WS token-out-of-URL (step 5) deferred: backend hermes-agent authenticates
WS only via ws.query_params, so moving it requires a coordinated backend
change (noted for follow-up).
Verified: testDebugUnitTest (334 passing) + assembleDebug green via local SDK.