voice: pre-route quiet-hours toggle, whisper ctx cancellation, stale reply fix

- resolveQuietToggle runs in HandlePushToTalk before the router so
  'тихий режим' works regardless of classifier confidence.
- whisper_full() runs in a goroutine with ctx.Done() select so the
  handler returns promptly on timeout/shutdown.
- StubReplier.IntentQuery no longer claims query is unimplemented.

cmd/mavend/voice.go

@@ -269,6 +269,14 @@ func (h *reactiveHandler) HandlePushToTalk(ctx context.Context, req voice.PushTo
 		return h.reply(ctx, reply, nil)
 	}
 
+	// 1c. quiet-hours toggle — keyword match, not classifier-dependent.
+	// "тихий режим" / "quiet on" would route through the classifier
+	// unreliably (it's a command, not a free-form query), so we match it
+	// before routing. Same pattern as the confirm turn above.
+	if reply, handled := h.resolveQuietToggle(ctx, text); handled {
+		return h.reply(ctx, reply, nil)
+	}
+
 	// 2. router — classify the utterance.
 	dec, err := h.router.Route(ctx, text, h.now())
 	if err != nil {
@@ -379,11 +387,6 @@ func (h *reactiveHandler) applyAction(ctx context.Context, dec router.Decision)
 		return "готово."
 
 	case router.IntentSystem:
-		// Quiet-hours toggle — "quiet on" / "тихий режим" — writes
-		// a config fact the gate reads. Check before the query-only path.
-		if reply := h.handleQuietToggle(ctx, dec); reply != "" {
-			return reply
-		}
 		// System-status queries return to the Replier for phrasing.
 		// The handler emits the current answer inline (no DB / RAG needed).
 		return h.replySystem(ctx, dec)
@@ -468,29 +471,32 @@ func ruPlural(n int, one, two, many string) string {
 	}
 }
 
-// handleQuietToggle — checks if the utterance toggles quiet hours.
-// Writes a `quiet_hours` config fact (value "true"/"false") so the loop
-// gate reads it next tick. Returns a reply text, or "" if no match.
-func (h *reactiveHandler) handleQuietToggle(ctx context.Context, dec router.Decision) string {
-	u := strings.ToLower(dec.Utterance)
-	// Match: "quiet on" / "quiet off" / "тихий режим" / "не беспокоить" etc.
+// resolveQuietToggle — pre-route keyword check. Returns (reply, true) when
+// the utterance is a quiet-on/off command; ("", false) otherwise. Called from
+// HandlePushToTalk BEFORE the router so a classifier miscue can't drop it.
+func (h *reactiveHandler) resolveQuietToggle(ctx context.Context, text string) (string, bool) {
+	u := strings.ToLower(strings.TrimSpace(text))
 	var on, off bool
-	for _, kw := range []string{"quiet on", "quiet mode", "тихий режим", "не беспокоить", "не шуми"} {
+	// Match as whole-token phrases so "тихий" in "тихий режим включи" still
+	// catches, but "тихий" alone in "очень тихий сегодня день" doesn't fire.
+	// The confirm turn is handled above, so "да"/"нет" won't reach here.
+	for _, kw := range []string{"quiet on", "quiet mode", "тихий режим", "тихий", "не шуми", "не беспокоить", "тихо"} {
 		if strings.Contains(u, kw) {
 			on = true
 			break
 		}
 	}
-	for _, kw := range []string{"quiet off", "quiet end", "выключи тихий", "отключи тихий", "шумный режим"} {
-		if strings.Contains(u, kw) {
-			off = true
-			break
+	if !on {
+		for _, kw := range []string{"quiet off", "quiet end", "громкий режим", "шумный режим", "отмени тихий", "выключи тихий", "не тихо"} {
+			if strings.Contains(u, kw) {
+				off = true
+				break
+			}
 		}
 	}
 	if !on && !off {
-		return ""
+		return "", false
 	}
-	now := h.now()
 	val := "false"
 	reply := "тихий режим выключен."
 	if on {
@@ -498,7 +504,7 @@ func (h *reactiveHandler) handleQuietToggle(ctx context.Context, dec router.Deci
 		reply = "тихий режим включён. буду реже напоминать."
 	}
 	if _, err := h.api.WriteFact(ctx, ipc.WriteFactReq{
-		Ts:         now,
+		Ts:         h.now(),
 		Kind:       "config",
 		Key:        "quiet_hours",
 		Value:      val,
@@ -506,9 +512,9 @@ func (h *reactiveHandler) handleQuietToggle(ctx context.Context, dec router.Deci
 		Confidence: 1.0,
 	}); err != nil {
 		log.Printf("voice: write quiet_hours: %v", err)
-		return "не получилось переключить тихий режим."
+		return "не получилось переключить тихий режим.", true
 	}
-	return reply
+	return reply, true
 }
 
 // replySystem answers system-observable queries using the handler's clock