* Make the persistent-storage request observable and warn when it is denied
The end-to-end encryption crypto store lives in IndexedDB. If the origin's storage is not
durable, Chromium can evict it under storage pressure, forcing a logout and recovery-key
re-entry. tryPersistStorage() requested navigator.storage.persist() but only logged the
boolean result, so a denial was invisible.
Make the request observable: it is now async and checks persisted() first (short-circuiting
to avoid re-requesting/re-prompting), a failure to query the state no longer blocks the
request, and a denial warns via the logger (captured by rageshakes) with a stronger
desktop-specific message. It never rejects - the sole caller treats it as fire-and-forget.
This makes the risk observable but cannot by itself guarantee durability: no Electron
main-process API can force per-origin persistence, so a complete cure needs a follow-up.
* Address review: log query errors, drop the requestStorageAccess fallback and the desktop-specific warning
- Include the caught error when the persisted-state query fails.
- Remove the document.requestStorageAccess branch: it is the Storage Access
API (cross-site cookie/storage access), not durability, and all supported
browsers (Safari >= 15.2 included) have navigator.storage.persist().
- Drop the desktop-specific suffix from the denial warning.
- Reword the fire-and-forget doc to avoid referencing the caller.
- Simplify the test harness: no descriptor save/restore, delete the stub in
afterEach.
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