Release v2.4.2 — fix overlay flash/pulse on open and close · haxllo/nex

Fixed open/close overlay flash and improved rendering reliability.

Changelog (6 commits since v2.4.1)

White flash on open: Quick launch items now load into state before UiCommand::Show is posted, so the initial state snapshot includes rows. Previously a race allowed the event loop to process Show before the DB read completed, causing the window to appear empty then populate a frame later.
Pulse on open: post("resize") now fires before post("painted"), so Rust sets the window height BEFORE making it visible (instead of at INITIAL_HEIGHT=60px then jumping).
Opacity flash on open: Removed opacity 0→1 from row-in animation. Rows now start fully visible with only a subtle translateY slide.
Body flash on close: UiCommand::Hide now hides the window BEFORE pushing cleared state, so the user never sees the empty body render.
Divider visible on idle: Added class="idle" to <div id="body"> in HTML so divider + list area are hidden by default until rows render.