refactor app code (#93)

Tactility/Source/app/desktop/Desktop.cpp

@@ -23,12 +23,12 @@ static void create_app_widget(const Manifest* manifest, void* parent) {
     lv_obj_add_event_cb(btn, &on_app_pressed, LV_EVENT_CLICKED, (void*)manifest);
 }
 
-static void desktop_show(TT_UNUSED App app, lv_obj_t* parent) {
+static void desktop_show(TT_UNUSED App& app, lv_obj_t* parent) {
     lv_obj_t* list = lv_list_create(parent);
     lv_obj_set_size(list, LV_PCT(100), LV_PCT(100));
     lv_obj_center(list);
 
-    auto manifests = app_manifest_registry_get();
+    auto manifests = getApps();
     std::sort(manifests.begin(), manifests.end(), SortAppManifestByName);
 
     lv_list_add_text(list, "User");
@@ -50,7 +50,7 @@ extern const Manifest manifest = {
     .id = "Desktop",
     .name = "Desktop",
     .type = TypeDesktop,
-    .on_show = &desktop_show,
+    .onShow = &desktop_show,
 };
 
 } // namespace