⛔ `writeState()` ran ONCE at boot. With the watch, the download lands SECONDS later — so `app-update.json` still said `staged: null` and settings rendered "Up to date" with no restart button, over a bundle sitting on disk. Seen directly in logcat rather than inferred: `ota: staged 791a4f78…` on the device, `staged: null` in the state the page reads. The `say` callback is the only signal that crosses out of `startOta`, so the rewrite keys on it — narrowly (`/^ota: staged /`), so an unrelated line cannot trigger a spurious write. ⚠ This is the third time today a value was correct in one layer and stale in the one that renders it: the banner needed `running`, the settings section printed only what it already agreed with, and now the file itself lagged the event. Rendering a snapshot of a thing that changes underneath is the recurring shape. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>