feat: 扫描报告页+手动选波长护理+光疗功效介绍页+诊断框架(占位阈值)

- services/diagnosis.js: 诊断流水线框架,阈值/PD映射为占位待标定,支持单波长降级
- auto-scan: 扫描完成改为出报告让用户选择护理(替代原自动开始治疗)
- 新增 scan-report/manual-treatment/light-info 三页,全部接入 i18n
- api.js: 新增 report/diagnosis-config 接口(对接后端契约)

miniprogram/pages/scan-report/scan-report.wxml

@@ -0,0 +1,66 @@
+<view class="page">
+  <view class="page-header page-header-gradient" style="padding-top:{{statusBarHeight + 8}}px;">
+    <view class="nav-back nav-back-light" bindtap="onBack">‹ {{i18n.common.back}}</view>
+    <view class="page-header-title">{{i18n.report.title}}</view>
+    <view class="page-header-subtitle">{{i18n.report.subtitle}}</view>
+  </view>
+
+  <view class="loading-container" wx:if="{{loading}}">
+    <view class="loading-spinner"></view>
+    <text class="loading-text">{{i18n.common.loading}}</text>
+  </view>
+
+  <view class="page-content" wx:if="{{!loading}}">
+    <view class="concept-banner" wx:if="{{!calibrated}}">
+      <text class="concept-icon">ⓘ</text>
+      <text class="concept-text">{{i18n.report.conceptNotice}}</text>
+    </view>
+
+    <view class="scan-time">{{i18n.report.scannedAt}}：{{scannedAtText}}</view>
+
+    <!-- Overall -->
+    <view class="card">
+      <view class="card-title">{{i18n.report.overallTitle}}</view>
+      <view class="chip-row" wx:if="{{hasProblem}}">
+        <view class="chip chip-lv{{item.level}}" wx:for="{{overallList}}" wx:key="label">
+          <text class="chip-name">{{item.label}}</text>
+          <text class="chip-lv">{{item.levelLabel}}</text>
+        </view>
+      </view>
+      <view class="empty-hint" wx:else>{{i18n.report.noProblem}}</view>
+    </view>
+
+    <!-- Per-region -->
+    <view class="card">
+      <view class="card-title">{{i18n.report.regionTitle}}</view>
+      <view class="region-row" wx:for="{{regionList}}" wx:key="name">
+        <text class="region-name">{{item.name}}</text>
+        <view class="region-right">
+          <text class="region-problem {{item.hasProblem ? '' : 'region-problem-none'}}">{{item.problemLabel}}</text>
+          <text class="region-lv region-lv{{item.level}}" wx:if="{{item.hasProblem}}">{{item.levelLabel}}</text>
+        </view>
+      </view>
+    </view>
+
+    <!-- Recommendation -->
+    <view class="card" wx:if="{{recommendList.length > 0}}">
+      <view class="card-title">{{i18n.report.recommendTitle}}</view>
+      <view class="rec-row" wx:for="{{recommendList}}" wx:key="mask">
+        <view class="rec-dot"></view>
+        <view class="rec-body">
+          <text class="rec-label">{{item.label}}</text>
+          <text class="rec-meta">{{item.wavelengthLabel}} · {{item.regionsLabel}}</text>
+        </view>
+      </view>
+    </view>
+
+    <view class="error-text" wx:if="{{error}}">{{error}}</view>
+
+    <view class="actions">
+      <button class="btn-primary" bindtap="onStartRecommend" disabled="{{starting}}" loading="{{starting}}" wx:if="{{recommendList.length > 0}}">{{i18n.report.startTreatment}}</button>
+      <button class="btn-secondary" bindtap="onManual">{{i18n.report.manualInstead}}</button>
+    </view>
+
+    <view class="disclaimer">{{i18n.report.disclaimer}}</view>
+  </view>
+</view>