feat(ui): use face-map layout for report zones and manual region picker; restrict manual care to smart mode

- scan-report: replace zone card grid with the same oval face-map layout as
  treatment-setup, zones tinted by recommended light with mode label; restore
  the per-light legend under the map
- manual-treatment: region picker now uses the same face-map layout
- manual care mode selection is smart-mode only: entry link hidden for
  non-subscribers and the page itself checks subscription (free mode passes
  since the backend reports it as active)

miniprogram/pages/manual-treatment/manual-treatment.wxml

@@ -24,15 +24,13 @@
     </view>
 
     <view class="page-title section-title">{{i18n.manual.regionTitle}}</view>
-    <view class="region-grid">
-      <view
-        wx:for="{{regions}}"
-        wx:key="key"
-        class="region-chip {{item.checked ? 'active' : ''}}"
-        bindtap="onToggleRegion"
-        data-idx="{{index}}">
-        {{i18n.common.regions[item.key]}}
-      </view>
+    <!-- 脸型图布局（与「使用设置」一致）；位置↔idx：0=左 1=中上 2=中 3=中下 4=右 -->
+    <view class="face-map">
+      <view class="face-region forehead {{regions[1].checked ? 'active' : ''}}" bindtap="onToggleRegion" data-idx="1">{{i18n.common.regions.top}}</view>
+      <view class="face-region left-cheek {{regions[0].checked ? 'active' : ''}}" bindtap="onToggleRegion" data-idx="0">{{i18n.common.regions.left}}</view>
+      <view class="face-region right-cheek {{regions[4].checked ? 'active' : ''}}" bindtap="onToggleRegion" data-idx="4">{{i18n.common.regions.right}}</view>
+      <view class="face-region nose {{regions[2].checked ? 'active' : ''}}" bindtap="onToggleRegion" data-idx="2">{{i18n.common.regions.middle}}</view>
+      <view class="face-region chin {{regions[3].checked ? 'active' : ''}}" bindtap="onToggleRegion" data-idx="3">{{i18n.common.regions.bottom}}</view>
     </view>
 
     <view class="page-title section-title">{{i18n.manual.durationTitle}}</view>