Latte Dock NG v1.2.39

Changes since v1.2.38

Parabolic zoom during launcher bounce (issue #42): a delegate kept alive
by ListView.delayRemove during a launcher→window conversion (index -1) is
now addressed through effectiveIndex (index >= 0 ? index : taskItem.lastValidIndex), so it keeps tracking the pointer instead of being
frozen at its old zoom or snapped to zoom level 1 by the clear broadcast.
Icon scaling when entering the dock (issue #40): the zoom gate in
ParabolicEventsArea.onParabolicMove was removed, so the parabolic effect
keeps updating during the zoom-in animation and no longer glitches from 1x.
Smoother zoom restore: zoom restore is delegated to the Behavior on zoom, avoiding jarring jumps when previous animations have not finished.
Phantom separators: a window without launcher identity no longer renders
as a thin separator placeholder; the placeholder is only used for
launcher-type entries whose URL is still resolving asynchronously.

"Keep Original Icon Colors" for the Trash widget (issue #44): a new
context-menu option strips the -symbolic suffix from the Trash icon so the
full-color icon from the icon theme shows, while the empty/full icon keeps
switching; disabling the toggle restores the original icon immediately.

Translations are synced after the Dock/Panel → Dock migration: ~25 strings
in latte-dock and the containment-actions context menu silently fell back
to English in every language; msgids are realigned and several strings
wrongly marked notr="true" in the Qt Designer dialogs are translatable
again.

New source-contract tests cover the parabolic effectiveIndex fallback, the
zoom restore path, the separator empty-URL guard, the Trash icon toggle, the
Qt Designer notr fixes, and the po translation sync.