Signing in now keeps history, dictionary, meetings with memos and documents,
memo tags, user commands and templates the same on desktop, phone and web,
with offline changes queued, deletions shared and phone edits arriving live.
The desktop registers in the phone's device list and signs out when
disconnected there; local-mode records move into the first account.
Live captions stream about a second behind speech, finish lines on pauses,
are polished in context by the local model and can use their own speech
model (the speech engine is downloaded again once, minimum 1.7.0).
Fixes suggestion paste on Ctrl+Alt+Enter, click acceptance, typing detection
in growing chat boxes, one-way cloud sync and failing account exports.
Bumps the product version to 1.7.0 (Android/iOS build 1070000).
