* feat: close modals with browser back button on mobile
Create reusable useModalHistory hook that pushes history state when a
modal opens and listens for popstate to close it. Apply to ReportModal,
ClearMissedConfirm, ExportModal, ImportConfirm, and all modals using
ConfirmModal/ShareDialog/Auth/ExportModal base components. Escape key
handling was already in place for desktop.
Closes#253
* fix: update tests for renamed button labels and missing useModalHistory mock
* feat: improve mobile edit modal swipe gestures and tab navigation
Replace React passive touch handlers with native non-passive
addEventListener via useEffect for reliable horizontal swipe blocking.
Reduce axis-lock threshold from 18-26px to 6px for more responsive
gesture detection. Remove isInteractive() guard so swipe works on
input fields. Add tab strip auto-scroll via scrollIntoView when
active tab changes. Fix vertical scrolling by changing readonly
fieldset from display:block to display:flex.
Closes#252
* fix: guard scrollIntoView for jsdom test compatibility
Daniel Volz