Fixed the update card reappearing for a moment after tapping it: the tap
re-ran the status check and republished NeedsUpdate before the download
service reported Loading, so the card flashed back in that gap.
Fixed the update card never returning after cancelling a download: both the
Cancelled branch and cancelDownload() forced the status to UpToDate, and the
card's tap is the only thing that re-evaluates it. The status is now
re-derived on the Cancelled to Idle transition, once the partially downloaded
archive - which carries today's date and would otherwise be read as a current
dictionary - has been cleaned up.
Fixed the download progress bar staying at 0% far too long: progress was
published in 3-percentage-point buckets and then scaled by the download stage
weight, so the bar only moved after about 7% of the archive had transferred.
Rebuilt the search field on the Material 3 TextField instead of a hand-rolled
BasicTextField inside a Surface, so it picks up the standard container, cursor
and icon treatment. Dictionary entry titles in the search field, the results
list and the article bar now share a dictionaryTitleLarge style that keeps the
font padding, so their line height lines up with the Material 3 text field.
OneWay
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