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

inc/ui/ui_settings_page.h

@@ -0,0 +1,56 @@
+#ifndef BLINKY_UI_SETTINGS_PAGE_H_
+#define BLINKY_UI_SETTINGS_PAGE_H_
+
+#include <stdint.h>
+
+#include <lvgl.h>
+
+#include "ui_page.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct ui_settings_page;
+struct ui_settings_item;
+
+typedef void (*ui_settings_item_draw_fn)(const struct ui_settings_item *item,
+					 lv_obj_t *container);
+
+struct ui_settings_item {
+	const char *icon;
+	const char *title;
+	const char *value;
+	ui_settings_item_draw_fn draw;
+	void *user_data;
+};
+
+struct ui_settings_page_ops {
+	struct ui_page_ops base;
+
+	uint8_t (*get_count)(struct ui_settings_page *page);
+	void (*get_item)(struct ui_settings_page *page, uint8_t index,
+			 struct ui_settings_item *item);
+	void (*on_enter)(struct ui_settings_page *page);
+	void (*on_select)(struct ui_settings_page *page, uint8_t index);
+	void (*on_back)(struct ui_settings_page *page);
+};
+
+struct ui_settings_page {
+	struct ui_page base;
+	const struct ui_settings_page_ops *ops;
+	const char *title;
+	const char *hint;
+	uint8_t selected;
+};
+
+static inline struct ui_settings_page *ui_page_to_settings(struct ui_page *page)
+{
+	return (struct ui_settings_page *)page;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BLINKY_UI_SETTINGS_PAGE_H_ */