- Added `tests/state/cache.test.mjs` to test profile persistence and URL health caching.
- Added `tests/nostr/sessionActor.test.mjs` to test session key encryption/decryption and storage.
- Added `tests/services/r2Service.test.mjs` to test R2 settings management and bucket configuration.
- Exposed `__testExports` in `js/nostr/sessionActor.js` to allow testing of private helper functions.
- Used `tests/test-helpers/setup-localstorage.mjs` to mock browser environments in all new tests.
