Name the machine in the secret-given message (issue 835, review round 2)

ADR 0380 §1 says the message names the module and the machine it is
for; the words named no machine at the terminal and only the desk's
machine at the desk. The headline now ends "on <node>" and the tell
carries "subject": <node> in both cases.

Also covers two gaps review round 2 flagged: a tell failure other
than ErrNothingServes/ErrGrantRefused surfaces and raises no
condition, and the terminal's hand act now names who asked (not just
where), extracted into terminalGiveHandAct so it is testable on its
own.

cmd/mesh-controller/desk_secret_test.go

@@ -594,9 +594,12 @@ func TestASecretGivenAtTheDeskIsToldOnceAndOpensNoCondition(t *testing.T) {
 		t.Fatalf("told the operator %d times, want exactly 1: %v", len(*calls), *calls)
 	}
 	call := (*calls)[0]
-	if call["headline"] != "A password was entered for telegram's telegram token" {
+	if call["headline"] != "A password was entered for telegram's telegram token on anchor" {
 		t.Errorf("headline %v", call["headline"])
 	}
+	if call["subject"] != "anchor" {
+		t.Errorf("subject %v", call["subject"])
+	}
 	lines, _ := call["lines"].([]string)
 	if len(lines) != 2 || !strings.Contains(lines[0], "at the desk on laptop at") ||
 		!strings.Contains(lines[0], "asked by mail-seats-835@novox") ||
@@ -678,3 +681,47 @@ func TestATrustedPartysSecretAtTheTerminalIsNotKeptWhenTellAndTheConditionBothFa
 		t.Error("the value was kept despite the failure")
 	}
 }
+
+// Review round 2 of mesh-controller (feat/mail-seats, head 5f24a47d): ADR 0380 §9's fallback — raising the
+// secret-given condition — answers only link.ErrNothingServes and link.ErrGrantRefused. Any other failure of
+// the operator channel's `tell` (the holder itself refusing, or answering something unreadable) is the
+// announcement's own failure, surfaced to the caller, and opens no condition.
+func TestAnOperatorChannelFailureOtherThanNothingServesOrGrantRefusedSurfacesAndRaisesNoCondition(t *testing.T) {
+	ctx := context.Background()
+	k, _ := withConditionsInMemory(t)
+	refused := errors.New("operator-channel.tell refused: too many lines")
+	askOperatorChannelFake(t, func(map[string]any) (json.RawMessage, error) { return nil, refused })
+	if err := announceSecretGiven(ctx, "anchor", "telegram", "telegram-token", "at the desk on laptop", "me"); err != refused {
+		t.Fatalf("announceSecretGiven = %v, want the refusal itself surfaced", err)
+	}
+	open, err := k.Open(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(open) != 0 {
+		t.Errorf("a condition was raised though the failure was neither ErrNothingServes nor ErrGrantRefused: %+v", open)
+	}
+}
+
+// Review round 2 of mesh-controller: a secret accepted at the controller's terminal writes a hand act naming
+// who asked, where and when it was given — and never the value (novox/hq ADR 0380 §6).
+func TestASecretAcceptedAtTheTerminalWritesAHandActNamingWhoWhereAndNeverTheValue(t *testing.T) {
+	act := terminalGiveHandAct("anchor", "telegram", "telegram-token", "mail-seats-835@novox")
+	if act.Verb != "secret accept" || act.Cause != "given-at-the-terminal" {
+		t.Fatalf("act %+v", act)
+	}
+	if !strings.Contains(act.Why, "at the controller's terminal") {
+		t.Errorf("the act does not name where: %q", act.Why)
+	}
+	if !strings.Contains(act.Why, "asked by mail-seats-835@novox") {
+		t.Errorf("the act does not name who: %q", act.Why)
+	}
+	if strings.Contains(act.Why, typed) {
+		t.Error("the act carries the value")
+	}
+	// When is RecordHandAct's own job (it stamps At with time.Now when the act leaves none, and By with the
+	// caller when the act leaves that empty too): this act leaves both for it to fill.
+	if act.By != "" || !act.At.IsZero() {
+		t.Errorf("the act sets its own who/when instead of leaving them to RecordHandAct: %+v", act)
+	}
+}