Tell him when an expired clarify question is dropped

Vikunja #382. A parked clarifying question past its TTL was discarded
silently on read; now she says the old request is gone and the newly
spoken words are still routed as a fresh utterance.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CGeSZxh1DCtRxmFVSYVGvJ

cmd/mavend/clarify.go

@@ -45,6 +45,40 @@ var clarifyQuestions = map[dialogue.Slot]string{
 // landed. Feminine self-reference ("поняла"), as everywhere.
 const clarifyGaveUp = "Прости, я не поняла. Скажи, пожалуйста, по-другому."
 
+// clarifyExpired — his answer came after the TTL, so the parked request is
+// already gone. Same tone as clarifyGaveUp, different reason: too much time
+// passed, not "I did not understand". Feminine self-reference ("ждала",
+// "отпустила"); he is addressed with a plain imperative.
+const clarifyExpired = "Прости, я слишком долго ждала ответа и отпустила прошлую просьбу. Если она ещё нужна, скажи заново."
+
+// clarifyExpiredNotice returns that line when a parked question had just timed
+// out, and "" when nothing was parked. Call it right after
+// resolveClarifyAnswer: a live question is answered there, an expired one is
+// only reported here — the words themselves still go on to be routed fresh.
+func (h *reactiveHandler) clarifyExpiredNotice() string {
+	if h.clarifyStore == nil {
+		return ""
+	}
+	if !h.clarifyStore.TakeExpired(voiceDialogueID, h.now()) {
+		return ""
+	}
+	log.Printf("voice: clarify — parked question expired, telling him and routing the words fresh")
+	return clarifyExpired
+}
+
+// withNotice glues the expiry notice in front of this turn's reply. One turn
+// carries one reply on the wire, so the notice cannot be a message of its own —
+// but neither the notice nor the fresh answer may be dropped.
+func withNotice(notice, reply string) string {
+	if notice == "" {
+		return reply
+	}
+	if reply == "" {
+		return notice
+	}
+	return notice + " " + reply
+}
+
 // missingFor returns the slots a decision still needs, most important first.
 // Empty ⇒ there is nothing identifiable to ask about.
 func missingFor(dec router.Decision) []dialogue.Slot {