Bug: "Keep Screen On" silently stops working after visiting a Settings sub-page #6

Hi! Thanks for FreeReps.

A small but consequential bug in Settings → Keep Screen On.

Steps to reproduce

1. Enable Keep Screen On
2. Stay on the sync page — screen stays awake as expected ✅
3. Navigate to any Settings sub-page (e.g. Connection)
   — nothing needs to be changed, just open it and go back
4. The toggle still looks enabled, but the screen now turns off normally ❌

Why this matters

When the screen locks mid-sync, the running upload is force-disconnected.
On my self-hosted server this shows up as:

level=ERROR msg="ingest error"
error="processing metrics: inserting health metrics: context canceled"

After returning to the app, sync progress shows "No Complete Baseline" and
the run has to be restarted. A stale Keep Screen On state silently aborts long
backfills.

Expected

The setting should stay in effect until explicitly toggled off, regardless of
navigation between Settings sub-pages.

Environment

• iOS app v1.0, iPhone, iOS 27.0