Add `packages/app/src/constants/platform.ts` with canonical gates
(isWeb, isNative, getIsElectron) and refactor all ~100 ad-hoc
Platform.OS checks across 69 files to use shared imports.
Fix sidebar hover crash on native (onPointerEnter → onHoverIn),
fix tooltip to use breakpoint instead of platform detection, make
sidebar action buttons always visible on native where hover doesn't
work, and document the platform gating decision matrix in CLAUDE.md.
On tablet-sized layouts the welcome-screen modals for direct connection and pair link could collapse so only the header row remained visible.
Adjust the desktop modal card and scroll container flex behavior so the modal body can shrink within the available height and remain visible instead of being clipped out.
Use stackBehavior="replace" on the preferences BottomSheetModal so it
dismisses the tab switcher combobox instead of minimizing it, preventing
the provider from auto-restoring the tab switcher when preferences closes.
Mohamed Boudra