the reply seam takes the turn's context (V-638)

voice.Replier.Reply had no context, so llmReplier phrased under
context.Background() and the only bound on a reply was phraser.timeout,
60s in deploy. Both call sites already held a context.

The stub ignores it: it makes no model call.

cmd/mavend/voice.go

@@ -458,7 +458,7 @@ func (h *reactiveHandler) runTurn(ctx context.Context, text string, src turnSour
 
 	// 9. replier — phrase the reply across the router decision.
 	if replyText == "" {
-		replyText = h.replier.Reply(dec)
+		replyText = h.replier.Reply(ctx, dec)
 	}
 	return withNotice(expiredNotice, replyText)
 }