chore: prune landed remote branches (closes #167)

Seventeen branches on origin that the issue classifies as landed, or
superseded by a merged pull request, were deleted; the evidence for each
is on the issue. Five whose work is not in next are kept: the three
issue 87 error-display branches and feature/show-private-key, reference
for issues 493 and 492, and chore/token-list-enrichment, re-created at
f7a2437, pending issue 495. TODO.md records this.

The branch-pruning Future Step had already left TODO.md in the issue 191
rewrite, so only the Completed Steps entry is added.

Model: opus-5-5

README.md

@@ -1510,6 +1510,14 @@ view would leave a wallet one click from deletion.
   route, including the Settings gear. A decrypt still running when the screen is
   left is discarded rather than written. The screen is not restorable, so
   reopening the popup lands on Home rather than back on the key.
+- **Clipboard**: tapping the key copies it to the clipboard, and the wallet
+  never clears the clipboard afterwards; leaving the screen wipes the key from
+  the page only. The clipboard is the user's, not the wallet's. Clearing it
+  would go against what the user expects, and by then they may have copied
+  something else vital that the clear would destroy. The user knows the key is
+  secret from the warning above the password input, which says that anyone with
+  it can access and transfer all funds from the address, and knows it is on the
+  clipboard because they copied it. From then on it is theirs to manage.
 
 #### AddressToken (`address-token`)
 
@@ -1840,6 +1848,9 @@ view would leave a wallet one click from deletion.
   gear. A decrypt still running when the screen is left is discarded rather than
   written. The screen is not restorable, so reopening the popup lands on Home
   rather than back on the phrase.
+- **Clipboard**: tapping the phrase copies it, and the wallet never clears the
+  clipboard afterwards, for the reasons given under ExportPrivKey; here the
+  warning box above the password input is what tells the user it is secret.
 
 #### DeleteWallet (`delete-wallet-confirm`)
 

TODO.md

@@ -56,15 +56,22 @@ but the review is broader than any of them.
   the change for [#87](https://git.eeqj.de/sneak/AutistMask/issues/87) that
   never landed, as reference for
   [#493](https://git.eeqj.de/sneak/AutistMask/issues/493);
-  `feature/show-private-key`, whose README clipboard policy section is reference
-  for [#492](https://git.eeqj.de/sneak/AutistMask/issues/492); and
+  `feature/show-private-key`, whose README clipboard policy section was the
+  reference for [#492](https://git.eeqj.de/sneak/AutistMask/issues/492); and
   `chore/token-list-enrichment`, deleted on 2026-09-09 and re-created at
   `f7a2437`, whose `scripts/` tooling waits on
   [#495](https://git.eeqj.de/sneak/AutistMask/issues/495). Afterwards
   `git ls-remote --heads origin` showed `main`, `next`, these five, and
-  `issue-167-prune-branches` and `issue-492-readme-clipboard`, the heads of the
-  open pull requests [#491](https://git.eeqj.de/sneak/AutistMask/pulls/491) and
-  [#494](https://git.eeqj.de/sneak/AutistMask/pulls/494).
+  `issue-167-prune-branches`, the head of
+  [#491](https://git.eeqj.de/sneak/AutistMask/pulls/491).
+
+- 2026-10-07: The README says that the wallet never clears the clipboard after
+  the private key or the recovery phrase is copied, and why
+  ([#492](https://git.eeqj.de/sneak/AutistMask/issues/492)): the clipboard is
+  the user's, clearing it would go against what they expect, and it could
+  destroy something else they copied since. It is under ExportPrivKey, with a
+  line under ShowRecoveryPhrase, and names the warning each password screen
+  actually shows, which says nothing about the clipboard.
 
 - 2026-10-07: The Firefox end-to-end suite no longer tolerates any uncaught
   extension error ([#487](https://git.eeqj.de/sneak/AutistMask/issues/487)). Its