feat(ui): 重构设置界面为页面控制器架构

- 添加新的UI页面基础架构(ui_page.h)，包含页面操作接口
- 创建设置页面控制器(ui_settings_controller.h/.c)来管理页面导航
- 实现具体的设置页面类型：根页面、BLE页面、主题页面
- 修改display_module.c以使用新的页面系统替代旧的状态机
- 移除过时的settings_ui.h头文件和相关状态结构
- 更新事件处理逻辑以使用页面指针而非状态数据传递
- 修改主界面实现以适配统一的页面接口标准

src/ui/ui_main.c

@@ -31,6 +31,9 @@ struct ui_main_ctx {
 
 static struct ui_main_ctx g_ui;
 static bool ui_initialized;
+static const struct ui_main_model *page_model;
+static const char *page_date_text;
+static const char *page_time_text;
 
 static const char *const status_texts[UI_STATUS_COUNT] = {
 	LV_SYMBOL_USB,
@@ -297,15 +300,55 @@ void ui_main_init(const struct ui_main_model *model,
 	ui_initialized = true;
 }
 
-void ui_main_set_visible(bool visible)
+void ui_main_deinit(void)
 {
-	if (!ui_initialized || (g_ui.content == NULL)) {
+	if (!ui_initialized) {
 		return;
 	}
 
-	if (visible) {
-		lv_obj_clear_flag(g_ui.content, LV_OBJ_FLAG_HIDDEN);
-	} else {
-		lv_obj_add_flag(g_ui.content, LV_OBJ_FLAG_HIDDEN);
+	if (g_ui.content != NULL) {
+		lv_obj_delete(g_ui.content);
 	}
+
+	memset(&g_ui, 0, sizeof(g_ui));
+	ui_initialized = false;
+}
+
+static void main_page_init(struct ui_page *page)
+{
+	ARG_UNUSED(page);
+	ui_main_init(page_model, page_date_text, page_time_text);
+}
+
+static void main_page_deinit(struct ui_page *page)
+{
+	ARG_UNUSED(page);
+	ui_main_deinit();
+}
+
+static void main_page_refresh(struct ui_page *page)
+{
+	ARG_UNUSED(page);
+	ui_main_refresh_all(page_model, page_date_text, page_time_text);
+}
+
+static const struct ui_page_ops main_page_ops = {
+	.init = main_page_init,
+	.deinit = main_page_deinit,
+	.refresh = main_page_refresh,
+};
+
+static struct ui_page main_page = {
+	.ops = &main_page_ops,
+};
+
+struct ui_page *ui_main_page_get(const struct ui_main_model *model,
+				 const char *date_text,
+				 const char *time_text)
+{
+	page_model = model;
+	page_date_text = date_text;
+	page_time_text = time_text;
+
+	return &main_page;
 }