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 () {