Of the two plaintext-localStorage items in #204, composer drafts were already
swept on logout (#41); the presence status message + expiry were deliberately
kept. They are PII with an authoritative copy in server presence, so sweep
them too. The test's localStorage mock now enumerates keys like the real
Storage object, so the prefix sweeps (drafts, status) are actually exercised —
the old 'draft preserved' assertion only passed because Object.keys() saw
nothing.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
draft-msg-<roomId> was unscoped and deliberately skipped on logout, then
hydrated into whoever logged in next. Wipe drafts in clearPlaintextCaches,
and only hydrate a draft whose stored userId matches the current user.
Drafts written before this change carry no userId and are dropped on
first load (a one-time loss of unsent drafts, accepted for the leak fix).
Fixes#41
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
Several localStorage caches held decrypted message content or user PII and
survived a normal logout, leaving residue on a shared device (the search
index was already wiped; these were not):
- cinny_scheduled_messages_v1 - decrypted IContent.body of pending sends
- cinny_recent_searches_v1 - search query text
- cinny_recent_forward_targets_v1 - recent forward contact/room graph
- cinny_recent_gifs_v1 / cinny_recent_stickers_v1 - media the user sent
- navToActivePath<userId> - per-space last-visited room paths
- (plus the translation cache added earlier)
Add a clear function per module and a single auditable clearPlaintextCaches()
aggregator, called from both logout paths (logoutClient + the server-forced
SessionLoggedOut handler) alongside the existing session/search-index wipes.
Unit-tested.
Deliberately NOT cleared (documented in the aggregator): unsent composer
drafts and the presence status message (preserved by product decision N98);
SDK sync/crypto store + io.lotus.* account data (reminders/bookmarks/notes),
already wiped by mx.clearStores(); low-sensitivity UI/metadata residue.
The forward-targets/gifs/stickers/nav-path additions and the accurate
"not covered" documentation address findings from two review passes.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>