CSS: added comprehensive zoom compensation for ALL modal-content
variants (memory, tasks, preset, doclib, gallery, notes-pane,
research, compare, email-lib) and a safety net for user-resized
windows carrying inline height styles.
JS (windowResize.js): _uiZoom() helper reads computed zoom from :root.
Restore path divides saved localStorage dimensions by zoom factor.
Resize-move viewport clamps use zoom-adjusted vh/vw so dragging
never pushes the window beyond the visible area.
Also added docs/improvement-tasks.md as the Ulysses task board.
