fix: replace facial/medical terms with neutral position labels

Region names: 左脸→左区, 右脸→右区, 额头→上区, 下巴→下区,
鼻唇→中区, 左眼→左上区, 右眼→右上区, 全脸→全区域.
Replace 面部/面罩 with 设备 in wear-check and auto-scan pages.

miniprogram/pages/treatment-setup/treatment-setup.js

@@ -3,11 +3,11 @@ Page({
   data: {
     statusBarHeight: 44,
     regions: [
-      { name: '左脸颊', mask: 0x01, checked: true },
-      { name: '右脸颊', mask: 0x02, checked: true },
-      { name: '额头', mask: 0x04, checked: true },
-      { name: '下巴', mask: 0x08, checked: true },
-      { name: '鼻唇', mask: 0x10, checked: true }
+      { name: '左区', mask: 0x01, checked: true },
+      { name: '右区', mask: 0x02, checked: true },
+      { name: '上区', mask: 0x04, checked: true },
+      { name: '下区', mask: 0x08, checked: true },
+      { name: '中区', mask: 0x10, checked: true }
     ],
     selectedMode: 0,
     subExpired: false,

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

@@ -23,14 +23,14 @@
     </view>
 
     <view class="page-title" style="font-size:28rpx;">选择区域</view>
-    <view class="mode-tip" wx:if="{{selectedMode === 0}}">普通模式固定 10 分钟，使用区域默认全脸，不可调整</view>
+    <view class="mode-tip" wx:if="{{selectedMode === 0}}">普通模式固定 10 分钟，使用区域默认全区域，不可调整</view>
 
     <view class="face-map">
-      <view class="face-region forehead {{regions[2].checked ? 'active' : ''}} {{selectedMode === 0 ? 'disabled' : ''}}" bindtap="onToggleRegion" data-idx="2">额头</view>
-      <view class="face-region left-cheek {{regions[0].checked ? 'active' : ''}} {{selectedMode === 0 ? 'disabled' : ''}}" bindtap="onToggleRegion" data-idx="0">左脸</view>
-      <view class="face-region right-cheek {{regions[1].checked ? 'active' : ''}} {{selectedMode === 0 ? 'disabled' : ''}}" bindtap="onToggleRegion" data-idx="1">右脸</view>
-      <view class="face-region nose {{regions[4].checked ? 'active' : ''}} {{selectedMode === 0 ? 'disabled' : ''}}" bindtap="onToggleRegion" data-idx="4">鼻唇</view>
-      <view class="face-region chin {{regions[3].checked ? 'active' : ''}} {{selectedMode === 0 ? 'disabled' : ''}}" bindtap="onToggleRegion" data-idx="3">下巴</view>
+      <view class="face-region forehead {{regions[2].checked ? 'active' : ''}} {{selectedMode === 0 ? 'disabled' : ''}}" bindtap="onToggleRegion" data-idx="2">上区</view>
+      <view class="face-region left-cheek {{regions[0].checked ? 'active' : ''}} {{selectedMode === 0 ? 'disabled' : ''}}" bindtap="onToggleRegion" data-idx="0">左区</view>
+      <view class="face-region right-cheek {{regions[1].checked ? 'active' : ''}} {{selectedMode === 0 ? 'disabled' : ''}}" bindtap="onToggleRegion" data-idx="1">右区</view>
+      <view class="face-region nose {{regions[4].checked ? 'active' : ''}} {{selectedMode === 0 ? 'disabled' : ''}}" bindtap="onToggleRegion" data-idx="4">中区</view>
+      <view class="face-region chin {{regions[3].checked ? 'active' : ''}} {{selectedMode === 0 ? 'disabled' : ''}}" bindtap="onToggleRegion" data-idx="3">下区</view>
     </view>
 
     <button class="btn-primary" bindtap="onStart" disabled="{{submitting}}" loading="{{submitting}}">