feat: remove background cam every time

main/application.h

@@ -148,6 +148,8 @@ private:
     bool assets_version_checked_ = false;
     bool play_popup_on_listening_ = false;  // Flag to play popup sound after state changes to listening
     std::atomic<bool> vision_text_mode_enabled_ = false;
+    std::atomic<bool> vad_speaking_ = false;
+    std::atomic<bool> vision_frame_sent_for_current_listen_ = false;
     int clock_ticks_ = 0;
     TaskHandle_t activation_task_handle_ = nullptr;
 
@@ -163,7 +165,7 @@ private:
     void HandleWakeWordDetectedEvent();
     void ContinueOpenAudioChannel(ListeningMode mode);
     void ContinueWakeWordInvoke(const std::string& wake_word);
-    void SendCurrentVisionFrame();
+    bool SendCurrentVisionFrame();
 
     // Activation task (runs in background)
     void ActivationTask();