feat: 添加设置模块和相关UI功能

- 新增settings_module.c实现设置菜单逻辑，包括蓝牙配对槽位管理和主题颜色选择
- 添加settings_mode_event.h/.c和settings_view_event.h/.c事件定义用于设置模式切换
- 创建settings_ui.h定义设置界面状态结构体和页面枚举
- 修改display_module.c集成设置UI显示逻辑，支持主界面和设置界面切换
- 在keyboard_core_module.c中添加设置活动状态检查，避免设置模式下键盘输入冲突
- 更新CMakeLists.txt包含新的源文件：settings_module.c、ui_settings.c及新事件文件
- 修改prj.conf调整LVGL内存池大小从16KB到32KB以支持更复杂UI渲染
- 移除BLE配对擦除相关配置选项并增加长按检测时间到1500毫秒
- 更新ui_main.c添加可见性控制函数用于界面切换

src/ui/ui_main.c

@@ -19,6 +19,7 @@ enum {
 };
 
 struct ui_main_ctx {
+	lv_obj_t *content;
 	lv_obj_t *status_badges[UI_STATUS_COUNT];
 	lv_obj_t *status_labels[UI_STATUS_COUNT];
 	lv_obj_t *battery_icon;
@@ -116,6 +117,10 @@ static void ui_main_create_status_chip(lv_obj_t *parent, enum ui_status_id id)
 
 void ui_main_refresh_status_bar(const struct ui_main_model *model)
 {
+	if (!ui_initialized) {
+		return;
+	}
+
 	for (uint32_t i = 0; i < UI_STATUS_COUNT; i++) {
 		lv_obj_t *badge = g_ui.status_badges[i];
 		lv_obj_t *label = g_ui.status_labels[i];
@@ -145,7 +150,8 @@ void ui_main_refresh_battery(const struct ui_main_model *model)
 	lv_color_t battery_color;
 	lv_color_t state_color = lv_color_white();
 
-	if ((g_ui.battery_icon == NULL) || (g_ui.battery_label == NULL) ||
+	if (!ui_initialized ||
+	    (g_ui.battery_icon == NULL) || (g_ui.battery_label == NULL) ||
 	    (g_ui.battery_state_label == NULL)) {
 		return;
 	}
@@ -171,7 +177,8 @@ void ui_main_refresh_battery(const struct ui_main_model *model)
 
 void ui_main_refresh_datetime(const char *date_text, const char *time_text)
 {
-	if ((g_ui.date_label == NULL) || (g_ui.time_label == NULL)) {
+	if (!ui_initialized ||
+	    (g_ui.date_label == NULL) || (g_ui.time_label == NULL)) {
 		return;
 	}
 
@@ -200,6 +207,7 @@ void ui_main_init(const struct ui_main_model *model,
 	lv_obj_t *bottom_row;
 
 	if (ui_initialized) {
+		ui_main_refresh_all(model, date_text, time_text);
 		return;
 	}
 
@@ -213,6 +221,7 @@ void ui_main_init(const struct ui_main_model *model,
 	lv_obj_set_scrollbar_mode(screen, LV_SCROLLBAR_MODE_OFF);
 
 	content = lv_obj_create(screen);
+	g_ui.content = content;
 	lv_obj_remove_style_all(content);
 	lv_obj_set_size(content, LV_PCT(100), LV_PCT(100));
 	lv_obj_set_style_bg_opa(content, LV_OPA_TRANSP, 0);
@@ -287,3 +296,16 @@ void ui_main_init(const struct ui_main_model *model,
 	ui_main_refresh_all(model, date_text, time_text);
 	ui_initialized = true;
 }
+
+void ui_main_set_visible(bool visible)
+{
+	if (!ui_initialized || (g_ui.content == NULL)) {
+		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);
+	}
+}