test: the e2e suite waits for each save before it closes the popup (closes #446)

The Settings round trip switched the theme and the network and closed
the popup at once. A close before the change handler's save lands loses
the switch, and the suite then ran on Sepolia.

tests/e2e/run.js now has one helper that polls a field of the stored
record until it holds the expected value, in place of the wait that
only read viewStack. Each Settings switch and spam-filter toggle waits
for its save, the recovery-phrase reopen waits for its saved view, and
reopenPopup() waits until the view it expects to reopen on is the saved
one.

Model: opus-5-5

TODO.md

@@ -45,6 +45,16 @@ but the review is broader than any of them.
 
 # Completed Steps
 
+- 2026-10-05: The e2e suite waits for a save to land before it closes the popup
+  ([#446](https://git.eeqj.de/sneak/AutistMask/issues/446)). The Settings round
+  trip switched the theme and the network and closed the popup at once, and a
+  close before the save lands loses the switch; with the network left on
+  Sepolia, a dozen later tests failed too. Each Settings switch and spam-filter
+  toggle is now waited for in storage before the close, and `reopenPopup()`
+  waits until the view it expects to reopen on is the saved one. A change made
+  while an earlier save from the same page is still running is lost even without
+  a close; that is [#448](https://git.eeqj.de/sneak/AutistMask/issues/448).
+
 - 2026-10-05: The lost-password delete confirmation refuses an empty field and
   ignores characters that paint nothing
   ([#336](https://git.eeqj.de/sneak/AutistMask/issues/336)). A wallet named only