fix: BLE reconnect stuck on binding state

- onRetry clears bind_result listener before disconnect
- Add 1s delay after closeBluetoothAdapter before re-scanning
- Fix binding state text from '点击连接' to '正在配对...'

miniprogram/pages/ble-connect/ble-connect.js

@@ -92,8 +92,15 @@ Page({
   },
 
   onRetry: function () {
+    var self = this
+    if (self._onBindResult) {
+      ble.off('bind_result', self._onBindResult)
+      self._onBindResult = null
+    }
     ble.disconnect()
-    this.startBleConnect()
+    setTimeout(function () {
+      self.startBleConnect()
+    }, 1000)
   },
 
   onMockConnect: function () {

miniprogram/pages/ble-connect/ble-connect.wxml

@@ -19,7 +19,7 @@
     <view class="found-card" wx:if="{{state === 'binding'}}">
       <view class="found-icon">💆</view>
       <view class="found-name">光子美容仪-{{deviceId}}</view>
-      <text class="status-badge status-badge-green">点击连接</text>
+      <text class="status-badge status-badge-green">正在配对...</text>
     </view>
 
     <view class="found-card" wx:if="{{state === 'error'}}">