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,