refactor app code (#93)

Tactility/Source/app/imageviewer/ImageViewer.cpp

@@ -8,7 +8,7 @@ namespace tt::app::imageviewer {
 
 #define TAG "image_viewer"
 
-static void on_show(App app, lv_obj_t* parent) {
+static void on_show(App& app, lv_obj_t* parent) {
     lv_obj_set_flex_flow(parent, LV_FLEX_FLOW_COLUMN);
     lvgl::toolbar_create(parent, app);
 
@@ -22,7 +22,7 @@ static void on_show(App app, lv_obj_t* parent) {
     lv_obj_t* image = lv_img_create(wrapper);
     lv_obj_align(image, LV_ALIGN_CENTER, 0, 0);
 
-    const Bundle& bundle = tt_app_get_parameters(app);
+    const Bundle& bundle = app.getParameters();
     std::string file_argument;
     if (bundle.optString(IMAGE_VIEWER_FILE_ARGUMENT, file_argument)) {
         std::string prefixed_path = "A:" + file_argument;
@@ -35,7 +35,7 @@ extern const Manifest manifest = {
     .id = "ImageViewer",
     .name = "Image Viewer",
     .type = TypeHidden,
-    .on_show = &on_show
+    .onShow = &on_show
 };
 
 } // namespace