chore: remove all mock/debug code for production release

Miniprogram:
- ENV switched to 'prod' (disables __DEV__ flag)
- Deleted mock.js and test-ble-frame.js
- Removed mockBind/mockPurchase from api.js
- Removed all debug UI panels and onMock* handlers from 6 pages
- Removed mock purchase fallback in subscribe-plans
- Removed SIMPLE PERIPHERAL dev board from BLE scan

Server:
- Removed /device/mock-bind route
- Removed /subscription/mock-purchase route
- Removed dev_openid fallback in wechat.js
- Removed mockBind() from binding.dao.js
- Removed mock fallback in purchase endpoint
- NODE_ENV default changed to 'production'

Admin:
- ENV switched to 'prod'

All mock code preserved in 'test' branch for future development use.

miniprogram/pages/auto-scan/auto-scan.js

@@ -1,6 +1,4 @@
 var ble = require('../../services/ble')
-var config = require('../../config/env')
-
 Page({
   data: {
     statusBarHeight: 44,
@@ -9,8 +7,7 @@ Page({
     regions: 0x7F,
     regionData: [],
     timeout: false,
-    error: '',
-    devMode: false
+    error: ''
   },
 
   onBack: function () {
@@ -25,8 +22,7 @@ Page({
     var app = getApp()
     this.setData({
       statusBarHeight: app.globalData.statusBarHeight,
-      regions: parseInt(options.regions) || 0x7F,
-      devMode: config.__DEV__ || false
+      regions: parseInt(options.regions) || 0x7F
     })
     this.startScan()
   },
@@ -93,15 +89,4 @@ Page({
     })
   },
 
-  onMockScanDone: function () {
-    var self = this
-    if (self._progressTimer) clearInterval(self._progressTimer)
-    var mask = parseInt(self.data.regions) || 0x7F
-    wx.redirectTo({
-      url: '/pages/treating/treating?regions=' + mask +
-        '&wavelength=2' +
-        '&duration=600000' +
-        '&mode=1'
-    })
-  }
 })