Claim now: a button on the account page claims a payout account's profit

For a payout account on a firm that takes claims by API (Vest), the
account page shows what it could claim right now — its whole profit above
the account size — or why not (not flat, history loading, below its
start). Pressing it asks first, then claims to the login's main account
under the lane's mutex, with the same checks and bookkeeping as the
bot's own claim at a stage's target: the account trades its next stage.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -256,6 +256,11 @@ own traffic since Vest publishes no API):
   so the bot marks its own opens and closes as it sends them; anything
   unmarked since marking began was someone else's. The **Trades** button on
   the Vest firm's dashboard row lists them, and the account page shows its own.
+- Claims: the bot claims a funded account's profit by itself at each stage's
+  target (`auto_claim`, on unless set to `off`). The account page's **Claim
+  now** button claims the whole profit above the account size at once — any
+  amount from $1 — when the account is flat; it asks first, since it moves
+  money to the login's main account.
 
 `npm run check` includes the Vest helpers (scripts/check-vest.mjs).