The desktop window opened at a hardcoded 1220×800 every launch, discarding
whatever size and position the user left it at (#39101) — on macOS the dock
reopen was the most visible case, but every restart reset it.
A small window-state.json under userData (same pattern as connection.json /
updates.json) records the window's normal bounds plus its maximized flag,
written debounced on resize/move/maximize and flushed on close, applied on the
next createWindow(). getNormalBounds() captures the pre-maximize size so an
un-maximize next session lands where the user actually sized it.
Restore is defensive: sanitize rejects garbage, drops off-screen positions
(window falls back to Electron centering), and caps a size saved on a
since-disconnected larger monitor to the largest current display. The geometry
math lives in a side-effect-free window-state.cjs so it unit-tests with
node --test, no Electron boot. No new dependency.
Salvages #39154 by @jeffrobodie-glitch — same userData approach and validation
intent, reimplemented tighter and folded into one module.
Co-authored-by: jeffrobodie-glitch <jeffrobodie@gmail.com>