K18 (asker hears refused): Take answers Refused with the router's words for a refused ask

The ask is closed as any ended ask is, then the asker's request ends with why.

Builds: design 47 G §570, §638

Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ

operator-and-conversation/go/clients/operatorchannelclient/client.go

@@ -153,6 +153,10 @@ func (c *Client) Take(w seat.Warrant, act func(seat.Option, seat.Warrant) error)
 		if _, err := c.State.Update(c.key(w.Ask), k, e.Revision); err != nil && !errors.Is(err, stdio.ErrChanged) {
 			return "", err
 		}
+		if w.Outcome == OutcomeRefused {
+			// The router never took the ask (design 47 G 570): its asker's request ends with the router's words.
+			return Refused, fmt.Errorf("the ask %s was refused: %s", w.Ask, w.Words)
+		}
 		return Recorded, nil
 	}
 	o, err := For(w, c.Module, k.Ask)

operator-and-conversation/go/clients/operatorchannelclient/client_test.go

@@ -140,6 +140,20 @@ func TestAnAskEndedWithoutAChoiceIsRecordedAndNothingDone(t *testing.T) {
 	}
 }
 
+func TestAnAskTheRouterRefusedEndsTheRequestWithItsWords(t *testing.T) {
+	c, _ := client()
+	_ = c.Ask(askedHeld())
+	w := askedWarrant()
+	w.Outcome, w.Option, w.By, w.Words = OutcomeRefused, "", nil, "its expiry passes the bound of its level"
+	h, err := c.Take(w, func(seat.Option, seat.Warrant) error { t.Fatal("acted"); return nil })
+	if h != Refused || err == nil || !strings.Contains(err.Error(), w.Words) {
+		t.Fatalf("%s %v, want refused with the router's words", h, err)
+	}
+	if h, _ := c.Take(askedWarrant(), func(seat.Option, seat.Warrant) error { t.Fatal("acted after it ended"); return nil }); h != Done {
+		t.Errorf("the refused ask was not closed: %s", h)
+	}
+}
+
 func TestAKeyPrefixIsPutBeforeEveryKeyOfTheClientsOwnStateAndNotBeforeWhere(t *testing.T) {
 	for _, tc := range []struct{ prefix, key string }{{"n1.", "n1.ask.d-1"}, {"", "ask.d-1"}} {
 		c, _ := client()