feat: filter meaningful conversations with local model

internal/mockprovider/server.go

@@ -391,7 +391,7 @@ func (s *Server) sendFinalTranscript(input voiceprovider.StartRequest) {
 		TaskRef: input.TaskRef, ConversationID: input.ConversationID,
 		EventType: "voice_chat.transcript.final", Status: "FINAL", OccurredAt: s.now().UTC(),
 		Turns: []voiceprovider.FinalTurn{
-			{TurnKey: "turn-1", SequenceNo: 1, Speaker: "subject", StartAt: base, EndAt: base.Add(6 * time.Second), FinalText: "我年轻时常在家乡河边散步，春天的柳树特别好看。", ProviderRef: "mock-turn-1"},
+			{TurnKey: "turn-1", SequenceNo: 1, Speaker: "subject", StartAt: base, EndAt: base.Add(6 * time.Second), FinalText: "我年轻时常和姐姐在家乡河边散步。有一次春天突然下雨，我们躲在老柳树下，后来一路笑着跑回家，现在想起来还是很高兴。", ProviderRef: "mock-turn-1"},
 			{TurnKey: "turn-2", SequenceNo: 2, Speaker: "agent", StartAt: base.Add(7 * time.Second), EndAt: base.Add(13 * time.Second), FinalText: "听起来那是一段很温暖的回忆，下次我们可以继续聊聊家乡的春天。", ProviderRef: "mock-turn-2"},
 		},
 	}