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/treatment-setup/treatment-setup.js

@@ -1,6 +1,4 @@
 var ble = require('../../services/ble')
-var config = require('../../config/env')
-
 Page({
   data: {
     statusBarHeight: 44,
@@ -16,8 +14,7 @@ Page({
     subDays: 6,
     fixedDurationMs: 600000,
     submitting: false,
-    error: '',
-    devMode: false
+    error: ''
   },
 
   onBack: function () {
@@ -30,7 +27,7 @@ Page({
 
   onLoad: function () {
     var app = getApp()
-    this.setData({ statusBarHeight: app.globalData.statusBarHeight, devMode: config.__DEV__ || false })
+    this.setData({ statusBarHeight: app.globalData.statusBarHeight })
     this.checkSubscription()
   },
 
@@ -109,17 +106,4 @@ Page({
     })
   },
 
-  onMockStart: function () {
-    var mask = 0
-    this.data.regions.forEach(function (r) {
-      if (r.checked) mask |= r.mask
-    })
-    if (mask === 0) mask = 0x7F
-    wx.redirectTo({
-      url: '/pages/treating/treating?regions=' + mask +
-        '&wavelength=2' +
-        '&duration=' + this.data.fixedDurationMs +
-        '&mode=' + this.data.selectedMode
-    })
-  }
 })

miniprogram/pages/treatment-setup/treatment-setup.wxml

@@ -38,10 +38,5 @@
     </button>
 
     <view class="error-text" wx:if="{{error}}">{{error}}</view>
-
-    <view class="debug-actions" wx:if="{{devMode}}">
-      <view class="debug-label">🔧 调试工具</view>
-      <button class="btn-secondary btn-sm" bindtap="onMockStart">模拟开始护理（跳过BLE）</button>
-    </view>
   </view>
 </view>