core: /_wallet bind, and name the other profiles instead of numbering them

Restoring a chat database older than the key loses which account each
profile had, and the keys are still there, so /_wallet bind <account> sets
it by hand. The counter moves past an account bound this way, and an
account another profile holds is refused.

/_wallet now shows the paths of the active profile only, and names the
other profiles on the key. Their account indexes were the gap that showed
a hidden profile exists.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Rvc3HbiWBTqbAvRT45G5oX

bots/src/API/Docs/Commands.hs

@@ -451,6 +451,7 @@ undocumentedCommands =
     "APIVerifyGroupMember",
     "APIVerifyToken",
     "APIWallet",
+    "APIWalletBind",
     "APIWalletCreate",
     "APIWalletDelete",
     "APIWalletExportDerivedSecret",