fix(audio): isolate conversation timeouts by round

ql-application/threadx/interface/custom_app/vad_det.c

@@ -43,7 +43,9 @@ static uint8_t vad_leave_message_flag = 0;//留言模式vad只做单次
 static Fvad *fvad_inst = NULL;
 extern struct ringbuffer *ring_sender;
 extern ql_sem_t sender_sem;
-extern unsigned char wss_connect_start; //表示vad拾音结束 开始等待后台返回 如果超过5s没有返回 则报超时语音
+extern void conversation_no_speech(void);
+extern void conversation_record_begin(void);
+extern void conversation_cancel_wait(void);
 
 // 配置
 static int sample_rate = 16000;             // FVAD 支持的采样率：8k/16k/32k/48k
@@ -89,6 +91,12 @@ void vad_tts_playback_finished()
 	vad_tts_playback_finished_status = 1;
 }
 
+void vad_reset_conversation_flags(void)
+{
+    no_speech_timeout = 0;
+    vad_tts_playback_finished_status = 0;
+}
+
 void vad_set_speech_timeout_flag(uint8_t value)
 {
 	no_speech_timeout = value;
@@ -216,7 +224,7 @@ int vad_audio_stop(void) {
 			 
 	ql_audio_record_close(record_hd, 1);
 
-	wss_connect_start = 1;//用于判断后台响应超时
+	/* Reply timeout starts in the sender only after END is submitted. */
 
     key_start_leave = 0;
 	//ql_rtos_semaphore_release(sender_sem); 
@@ -226,6 +234,7 @@ int vad_audio_stop(void) {
 
 // 停止录音
 int vad_audio_stop_no_wait_resp(void) {
+    conversation_cancel_wait();
 
     printf("Audio recording stopped no_wait_resp, frames: %d, speech: %d", 
              frame_count, speech_frame_count);
@@ -234,7 +243,7 @@ int vad_audio_stop_no_wait_resp(void) {
 			 
 	ql_audio_record_close(record_hd, 1);
 
-	wss_connect_start = 0;
+
 			 
     return 0;
 }
@@ -242,6 +251,7 @@ int vad_audio_stop_no_wait_resp(void) {
 
 // 触发录音（按键触发）
 void vad_audio_trigger_record(void) {
+    conversation_record_begin();
     g_triggered = true;
     printf("Record triggered");
 }
@@ -449,6 +459,7 @@ void vad_audio_process(void) {
                     if ((now - no_sound_start_time) > VAD_NO_SOUND_TIMEOUT_MS) {
                         printf("No speech for timeout, stopping");
                         no_speech_timeout = 1;
+                        conversation_no_speech();
                         set_state(STATE_WAITING_COMMAND);
                         vad_audio_stop();
                         buffer_offset = 0;