iOS/macOS: compile-verify + finish the Swift legs of the menu-cleanup PR #335

Follow-up to the menu-cleanup PR (tanarchytan:menu-cleanup-pr; link added in a comment below). That PR's Swift legs were written on a Windows box with no Xcode, so app-target Swift got no compile (there is no CI for it), and one iOS-only duplicate was deliberately left out.

To do on a Mac:

1. Compile-verify the PR's Swift changes (Strand macOS + NOOPiOS iOS):

   • Test Centre "Advanced" card removal, Strand/Screens/TestCentreView.swift
   • "Broadcast heart rate" to "Broadcast strap HR (Garmin/ANT)" rename, Strand/Screens/SettingsView.swift
   • "Only when worn" toggle + onlyWhenWornBinding removal, Strand/Screens/AutomationsView.swift

2. Finish the one iOS-only dedup left out of the PR: remove SettingsView's "Scheduled debug export" card (a duplicate of the Test Centre section-3 export, same ScheduledDebugExport store). It has scattered state to unwind: @State debugExportOn / debugExportMinutes, .onAppear { ScheduledDebugExport.activateIfEnabled() }, .onChangeCompat(of: debugExportOn) { ScheduledDebugExport.setEnabled($0) }, the time-picker hook, and runNow. Needs a compile to do safely.

A separate, older iOS cleanup (legacy stress-nudge) is tracked at #330.