Enhance device activation and OTA update process

- Add support for device activation with audio feedback
- Refactor OTA update flow to include activation code handling
- Update asset management for localized sound resources
- Improve error handling and device state management
- Reorganize binary asset includes and CMake configuration

main/display/lcd_display.cc

@@ -274,14 +274,6 @@ void LcdDisplay::SetupUI() {
     lv_obj_set_style_text_font(battery_label_, fonts_.icon_font, 0);
 }
 
-void LcdDisplay::SetChatMessage(const std::string &role, const std::string &content) {
-    DisplayLockGuard lock(this);
-    if (chat_message_label_ == nullptr) {
-        return;
-    }
-    lv_label_set_text(chat_message_label_, content.c_str());
-}
-
 void LcdDisplay::SetEmotion(const std::string &emotion) {
     struct Emotion {
         const char* icon;