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/treating/treating.js

@@ -1,8 +1,6 @@
 var ble = require('../../services/ble')
 var api = require('../../utils/api')
 var commandSync = require('../../services/command-sync')
-var config = require('../../config/env')
-
 Page({
   data: {
     statusBarHeight: 44,
@@ -18,7 +16,6 @@ Page({
     paused: false,
     completed: false,
     startedAt: 0,
-    devMode: false,
     regionText: '全脸护理',
   },
 
@@ -34,7 +31,7 @@ Page({
 
   onLoad: function (options) {
     var app = getApp()
-    this.setData({ statusBarHeight: app.globalData.statusBarHeight, devMode: config.__DEV__ || false })
+    this.setData({ statusBarHeight: app.globalData.statusBarHeight })
     this._deviceId = ble.getDeviceId() || (app.globalData.currentDevice && app.globalData.currentDevice.device_id) || ''
     var regions = parseInt(options.regions) || 0x7F
     this.setData({
@@ -259,7 +256,4 @@ Page({
     })
   },
 
-  onMockComplete: function () {
-    this.finishAsComplete()
-  }
 })

miniprogram/pages/treating/treating.wxml

@@ -27,11 +27,6 @@
       </view>
     </view>
 
-    <view class="debug-actions" wx:if="{{devMode}}">
-      <view class="debug-label">🔧 调试工具</view>
-      <button class="btn-secondary btn-sm" bindtap="onMockComplete">模拟护理完成</button>
-    </view>
-
     <button class="btn-primary btn-primary-red" bindtap="onStop">停止护理</button>
   </view>
 </view>