App and Service improvements (#106)

Tactility/Source/app/screenshot/ScreenshotUi.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include "app/App.h"
+#include "app/AppContext.h"
 #include "lvgl.h"
 
 namespace tt::app::screenshot {
@@ -13,6 +13,6 @@ typedef struct {
     lv_obj_t* delay_textarea;
 } ScreenshotUi;
 
-void create_ui(const App& app, ScreenshotUi* ui, lv_obj_t* parent);
+void create_ui(const AppContext& app, std::shared_ptr<ScreenshotUi> ui, lv_obj_t* parent);
 
 } // namespace