fix: resolve multiple miniprogram bugs and extend admin console

- fix manual bind stuck at BLE scan, redirect to bind-success
- add 15s timeout and stopScan to ble-connect
- add stopScan method to ble.js
- add back-to-home button on bind-success page
- fix field name in subscribe-plans (plan -> plan_type)
- fix history.js to handle created_at field
- fix index.js to handle device name field
- add subscription route alias in request.js
- extend admin cloud function from 1 to 9 actions
- add mock mode to admin-console request.js
- remove unused discover page and legacy record function

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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

@@ -1,5 +1,6 @@
 var ble = require('../../services/ble')
 var app = getApp()
+var SCAN_TIMEOUT = 15000
 
 Page({
   data: {
@@ -19,19 +20,32 @@ Page({
     this.startBleConnect()
   },
 
+  onUnload: function () {
+    clearTimeout(this._scanTimer)
+    ble.stopScan()
+  },
+
   startBleConnect: function () {
     var self = this
     self.setData({ state: 'scanning', error: '' })
 
+    self._scanTimer = setTimeout(function () {
+      ble.stopScan()
+      self.setData({ state: 'error', error: '搜索超时，请确认设备已开机并在附近' })
+    }, SCAN_TIMEOUT)
+
     ble.startScan({
       onFound: function (device) {
+        clearTimeout(self._scanTimer)
         self.setData({ state: 'connecting' })
       },
       onConnected: function (device) {
+        clearTimeout(self._scanTimer)
         self.setData({ state: 'binding' })
         self.doBind()
       },
       onError: function (err) {
+        clearTimeout(self._scanTimer)
         self.setData({ state: 'error', error: err.msg || '连接失败' })
       }
     })