refactor(event): replace global 60s inactivity timer with per-second tick event

Adds KEY_EVENT_SECOND_TICK, generated once per real second from
Clock_IncMS() via a new second_tick_flag and pushed through the normal
event queue, so every foreground App's onEvent() receives it and
decides independently whether to act. Removes the old global
inactivity_timer (60s sleep from anywhere) entirely. HomeApp now
accumulates its own idle-second counter and sleeps after 10s idle
specifically while on the home screen; MenuApp's existing 10s
auto-close is converted from onRun() polling to the same tick+reset
pattern for consistency. Any non-tick key event resets each app's own
counter to 0.

App/app_menu.c

@@ -6,7 +6,6 @@
 #include "system.h"
 #include "database.h"
 #include "language.h"
-#include "clock.h"
 #include "../Drivers/rf.h"
 
 // 外部全局变量引用
@@ -16,12 +15,11 @@ extern u8 menu_select;
 // 菜单闲置自动关闭超时 (秒)：无任何按键操作达到这个时长，自动退出菜单返回时钟主页
 #define MENU_IDLE_TIMEOUT_SEC 10
 
-// 本应用私有变量：记录最近一次按键活动时的秒计时快照
-static u8 menu_idle_start_sec = 0;
+// 本应用私有变量：累计未按任何键的秒数 (由 KEY_EVENT_SECOND_TICK 驱动，任意按键事件清零)
+static u8 menu_idle_sec = 0;
 
 // 声明本应用的生命周期回调函数
 static void MenuApp_OnStart(void);
-static void MenuApp_onRun(void);
 static void MenuApp_onClose(void);
 static EventResult MenuApp_onEvent(SystemEvent *evt);
 
@@ -30,7 +28,7 @@ WristbandApp menu_app = {
     APP_ID_MENU,
     "Menu",
     MenuApp_OnStart,
-    MenuApp_onRun,
+    NULL,
     MenuApp_onClose,
     MenuApp_onEvent
 };
@@ -41,7 +39,7 @@ WristbandApp menu_app = {
 static void MenuApp_OnStart(void)
 {
     menu_select = 0;
-    menu_idle_start_sec = current_sec;
+    menu_idle_sec = 0;
     current_state = STATE_PAIR_MENU; // 系统运行状态设为对码配置菜单
     RF_SetMode(0);                   // 关闭射频接收芯片，防止接收杂波干扰屏幕绘制
     UI_ShowMainMenu(menu_select);    // 绘制主菜单
@@ -49,20 +47,6 @@ static void MenuApp_OnStart(void)
     XTELL_LOG("[MenuApp] Started\r\n");
 }
 
-/**
- * @brief MenuApp 轮询主回调：检测闲置超时，无操作达到 MENU_IDLE_TIMEOUT_SEC 秒自动退出
- */
-static void MenuApp_onRun(void)
-{
-    u8 elapsed = (current_sec >= menu_idle_start_sec)
-                     ? (current_sec - menu_idle_start_sec)
-                     : (60 + current_sec - menu_idle_start_sec);
-    if (elapsed >= MENU_IDLE_TIMEOUT_SEC) {
-        XTELL_LOG("[MenuApp] Idle timeout, closing.\r\n");
-        AppManager_SwitchToForeground(&home_app);
-    }
-}
-
 /**
  * @brief MenuApp 退出清理回调
  */
@@ -78,7 +62,19 @@ static void MenuApp_onClose(void)
  */
 static EventResult MenuApp_onEvent(SystemEvent *evt)
 {
-    menu_idle_start_sec = current_sec; // 任意按键活动都刷新闲置计时起点
+    // 0. 整秒滴答：累计闲置秒数，达到门限就自动关闭菜单退回待机主页
+    if (evt->key_event == KEY_EVENT_SECOND_TICK) {
+        menu_idle_sec++;
+        if (menu_idle_sec >= MENU_IDLE_TIMEOUT_SEC) {
+            menu_idle_sec = 0;
+            XTELL_LOG("[MenuApp] Idle timeout, closing.\r\n");
+            AppManager_SwitchToForeground(&home_app);
+        }
+        return EVENT_HANDLED;
+    }
+
+    // 收到任意其它按键事件，说明用户仍在操作，清零闲置计数
+    menu_idle_sec = 0;
 
     if (evt->key_event == KEY_EVENT_UP_CLICK) {
         // 短按 ▲ 键向上移动焦点，允许循环切换 (到顶绕到底)