Admin page: the top bar clears the status bar in the iOS app (#423)

admin.html's viewport meta lacked viewport-fit=cover, which index.html
has. Without it env(safe-area-inset-top) is 0, so the top bar's padding
did not clear the clock in the app's full-screen web view, and the back
arrow sat under it and could not be tapped. Seen in the simulator, the
built page served locally: the arrow and the title level with the
clock before, below the status bar after.

Also a launch argument, -ipx.noBadgePrompt, so a simulator run can get
past the badge permission dialog.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

web/CHANGELOG.md

@@ -23,6 +23,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - The Check every feed button in All Subscriptions' header, which did what the top bar's does (#416).
 
 ### Fixed
+
+- The admin page's top bar clears the status bar in the iOS app, so its back button can be tapped; the page asked for no room under the clock as the app page does (#423).
 - Swiping, or j, through more than 50 items no longer stops at the 50th until a reload: the next ones are fetched as you near the end, and Load more on the Unread tab no longer skips as many unread items as you had read (#383).
 - On the Unread tab, a short list read through no longer asks the server for more that is not there, or shows a count of 0 items beside the items still on screen (#385).
 - ipx-web no longer logs a deprecation warning about its metrics setting at every start (#381).