InstallHint shows "Tap Share, then Add to Home Screen to get notifications"
only in iOS and iPadOS Safari browser tabs (not when display-mode is
standalone or navigator.standalone is true), since iOS delivers Web Push
only to installed apps. Dismissing it is remembered per device in
localStorage; when storage is unavailable the hint still shows and
dismisses for the page's lifetime. Exported from src/pwa/InstallHint.tsx
for onboarding step 3 and the Notifications screen.
Maestro task: ad6b3d80-9f41-40ac-8e2a-f786e1fa9777
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
