Cancel a reminder by voice, and honour a refusal (V-719)

reminder_cancel.go is a stateful pre-route resolver ahead of a parked
clarification and the statistical cascade. It accepts only an addressed
command-position imperative plus the reminder or alarm noun, so questions,
reported speech, past-tense reports and prohibitions establish no mutation
authority. Subject terms keep negation and quantity, and a parsed time
passes the same resolved-hour gate as capture.

One match cancels through the typed IPC method. Several are stored as
session candidates in the spoken order, capped at five, and only a whole
affirmative ordinal consumes that list: re-querying on the follow-up would
let a state change move the ordinal underneath him. No match, an unread
time, a spent ordinal and an ambiguous delivery result are all explicit
no-ops.

command_prohibition.go is the first mutation boundary in a turn. A direct
prohibition clears the three confirmation slots under their shared mutex,
so a later bare "да" cannot revive authority he has just revoked. A parked
clarify question is not authority and survives, suspended and repeated.
refusesCommand is the same belt at the executor entry points, checked
against the original utterance so a model rewriting Slots.Text cannot get
around it.

The rung is named in preRouteLadder, so /trace records whether it won or
declined on every surface.

--no-verify: master is the working branch this session by the owner's call.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

cmd/mavend/replier_llm_test.go

@@ -20,22 +20,46 @@ type stubCompleter struct {
 
 func (s stubCompleter) Complete(_ context.Context, _ llm.Req) (string, error) { return s.out, s.err }
 
-func TestLLMReplierPassesTheModelReplyThrough(t *testing.T) {
+func TestLLMReplierPassesTheModelReplyThroughForOtherIntents(t *testing.T) {
 	r := newLLMReplier(stubCompleter{out: `{"response":"записала, кофе закончился","mood":"neutral"}`}, nil)
-	got := r.Reply(context.Background(), router.Decision{Intent: router.IntentNote, Slots: router.Slots{Text: "кофе закончился"}})
+	got := r.Reply(context.Background(), router.Decision{Intent: router.IntentReminder, Slots: router.Slots{Text: "кофе закончился"}})
 	if got != "записала, кофе закончился" {
 		t.Errorf("got %q, want %q", got, "записала, кофе закончился")
 	}
 }
 
+type countingCompleter struct {
+	out   string
+	calls int
+}
+
+func (c *countingCompleter) Complete(_ context.Context, _ llm.Req) (string, error) {
+	c.calls++
+	return c.out, nil
+}
+
+func TestLLMReplierNoteUsesFixedFeminineAcknowledgement(t *testing.T) {
+	c := &countingCompleter{out: `{"response":"Хорошо, сохранил.","mood":"neutral"}`}
+	r := newLLMReplier(c, nil)
+	got := r.Reply(context.Background(), router.Decision{
+		Intent: router.IntentNote, Slots: router.Slots{Text: "запасной ключ лежит в синей коробке"},
+	})
+	if c.calls != 0 {
+		t.Fatalf("note acknowledgement called the resident model %d time(s), want none", c.calls)
+	}
+	if got != "сохранила заметку." {
+		t.Fatalf("note acknowledgement = %q, want the fixed feminine line", got)
+	}
+}
+
 func TestLLMReplierFallsBackToStubOnError(t *testing.T) {
 	r := newLLMReplier(stubCompleter{err: errReplierTest}, nil)
-	assertAck(t, r, router.Decision{Intent: router.IntentNote}, phraser.AckNote, "llm error")
+	assertAck(t, r, router.Decision{Intent: router.IntentReminder}, phraser.AckReminder, "llm error")
 }
 
 func TestLLMReplierFallsBackToStubOnEmpty(t *testing.T) {
 	r := newLLMReplier(stubCompleter{out: ""}, nil)
-	assertAck(t, r, router.Decision{Intent: router.IntentNote}, phraser.AckNote, "empty llm")
+	assertAck(t, r, router.Decision{Intent: router.IntentReminder}, phraser.AckReminder, "empty llm")
 }
 
 // A clarify never reaches the model, and since Vikunja #457 it is answered from