fix(power): reset performance state (KEY_ID_1629/PressFlag/StartFlag) on power-on after soft-off

Co-authored-by: Cursor <cursoragent@cursor.com>

Global/Global.c

@@ -209,6 +209,10 @@ static void PowerOff_EmergencyReset(void)
 void System_PowerOn(void)
 {
   LOG_I("PWR", "power_on begin");
+  /* 软关机不复位 MCU：清掉上次会话的演奏状态，保证开机拨片走当前调一级兜底 */
+  KEY_ID_1629 = 0;
+  PressFlag   = 0;
+  StartFlag   = 0;
   s_pwr_rails_cut = 0u;
   s_pwr_off_grace_ms = 0u;
   /* 本次长按已用于开机：先消耗，再置 powon，防止 TMR7 ISR 把同一按压力即判为关机 */