feat：增加蓝牙配网功能

src/button_manager.cpp

@@ -44,13 +44,13 @@ void ButtonManager::begin() {
     pinMode(BTN_ALARM_DISMISS_PIN, INPUT_PULLUP);
     pinMode(BTN_PAGE_SWITCH_PIN,   INPUT_PULLUP);
 
-    // 读取初始状态, 避免启动时的虚假边沿
-    _btnProvision.rawState   = _readPin(BTN_PROVISION_PIN);
-    _btnProvision.stableState = _btnProvision.rawState;
-    _btnDismiss.rawState     = _readPin(BTN_ALARM_DISMISS_PIN);
-    _btnDismiss.stableState   = _btnDismiss.rawState;
-    _btnPage.rawState        = _readPin(BTN_PAGE_SWITCH_PIN);
-    _btnPage.stableState      = _btnPage.rawState;
+    // 强制初始化为未按下 (PCB 上电 GPIO 不稳, 忽略初始状态)
+    _btnProvision.rawState    = false;
+    _btnProvision.stableState  = false;
+    _btnDismiss.rawState      = false;
+    _btnDismiss.stableState    = false;
+    _btnPage.rawState         = false;
+    _btnPage.stableState       = false;
 
     Serial.println(F("[按钮] ✅ 三按钮初始化完成 (双向去抖+超时自愈)"));
     Serial.printf("  配网: GPIO%d | 解除报警: GPIO%d | 翻页: GPIO%d\n",
@@ -64,6 +64,9 @@ void ButtonManager::begin() {
 // ============================================================
 
 void ButtonManager::loop() {
+    // 开机 10 秒静默 (PCB 上电 GPIO 不稳 + 强制初始未按下)
+    if (millis() < 10000) return;
+
     // 按钮1: 配网 (仅长按)
     _processButton(_btnProvision, false, true);