- ChatThread send had no onError: a 404 (recipient gone) or 429 (rate-limited)
send failed silently (api.req shows no modal for those "caller-handled" statuses).
Added onError → toast for 404/429 (400/409/500 already raise the global dialog);
draft is kept for retry. New trilingual messages.sendFailed key.
- ChatThread scroll-to-bottom effect keyed on `plain` too, so every 20s poll's
decrypt pass yanked a scrolled-up reader back to the bottom. Key on items.length.
- ChatThread + Messages decrypt effects keyed on `items` (a fresh `?? []` array
every render) → a render storm while loading. Key on q.dataUpdatedAt.
- chatDock.ts: use LS.chatDock(userId) instead of the bare "siftlode.chatDock.*"
literal (matches the storage LS registry).
tsc green, re-review clean, localdev boots, Messages renders (locked-state) w/o console errors.