update a main page for test

lv_sim_linux/GUI/PageManager.c

@@ -11,6 +11,18 @@ void PageManager_init(void) {
     memset(&PageManager, 0, sizeof(PageManager));
 }
 
+/**
+ * load init screen
+ */
+void PageManager_load_init_screen(void) {
+    if (PageManager.count == 0) return;
+
+    Page_t* initial_page = PageManager.pages[0];
+    if (initial_page->init) initial_page->init();
+    lv_scr_load(*initial_page->page_obj);
+    PageManager.current_index = 0;
+}
+
 /**
  * 注册一个新页面
  * @param page 页面结构体指针