fix: an open popup moves to the recovery screen when its profile becomes unreadable (closes #373)

A popup already open when the stored profile became unreadable stayed on the
last good profile until reopened. Every save already runs the check loadState()
runs at open; a save refused by it now raises the recovery screen, stops the
ten-second refresh, and passes the screen to showView(), which runs the leave
cleanup of the screen it replaces and records it as the current view. From
then on showView() shows nothing else, so a transaction wait or a later save
cannot take the user off it or clear an export or a typed confirmation. Any
other failed save keeps the "NOT SAVED" banner. The popup test harness now
honours clearInterval().

Model: opus-5-5

TODO.md

@@ -45,6 +45,18 @@ but the review is broader than any of them.
 
 # Completed Steps
 
+- 2026-10-04: A popup that is already open when the stored profile becomes
+  unreadable moves to the recovery screen
+  ([#373](https://git.eeqj.de/sneak/AutistMask/issues/373)). It used to stay on
+  the last good profile, with the "NOT SAVED" banner at most, until reopened.
+  Every save already ran the check the popup runs at open; a save that fails
+  that check now raises the recovery screen and stops the ten-second refresh, so
+  the popup finds the record at the next navigation or refresh. The screen it
+  replaces is left as any navigation leaves it, so a revealed phrase or key or a
+  typed password is wiped. Once up, nothing else can replace it, and a later
+  save or a transaction wait that ends does not clear an export or a typed
+  confirmation. Any other failed save still gets the banner and leaves the
+  screen alone.
 - 2026-10-04: The signature screen shows a personal message as the bytes that
   are signed ([#403](https://git.eeqj.de/sneak/AutistMask/issues/403)). It
   showed only the decoded text, with bidirectional and zero-width characters