feat(mp): 连接M2手环后自动测量5项指标 + 修复仪表盘数值不可见

- 连接认证成功后自动依次测量心率→血氧→血压→体温→压力
- 列表式进度UI展示每项指标状态（等待/测量中/完成/跳过）
- 总进度条百分比实时更新
- 测量完成后保存结果并显示'查看结果并返回'按钮
- 支持取消自动测量，已测得的数据不丢失
- 修复仪表盘中心区域缺少背景色导致数值与底色混淆不可见

apps/miniprogram/native/pkg-veepoo/index.wxml

@@ -48,7 +48,78 @@
   </view>
 </block>
 
-<!-- ═══ 就绪 + 测量 ═══ -->
+<!-- ═══ 自动测量中 / 自动测量完成 ═══ -->
+<block wx:elif="{{phase === 'ready' && (autoMeasuring || autoMeasureDone)}}">
+  <view class="measure-page">
+    <!-- 设备状态栏 -->
+    <view class="device-bar">
+      <view class="device-bar__left">
+        <view class="device-bar__dot"></view>
+        <text class="device-bar__name">{{deviceName}}</text>
+        <text wx:if="{{batteryLevel !== null}}" class="device-bar__battery">{{batteryLevel}}%</text>
+      </view>
+      <view wx:if="{{autoMeasuring}}" class="device-bar__disconnect" bindtap="handleCancelAutoMeasure">取消</view>
+    </view>
+
+    <view class="auto-measure">
+      <!-- 标题 -->
+      <view class="auto-measure__header">
+        <text class="auto-measure__title">{{autoMeasureDone ? '✓ 测量完成！' : '正在自动测量...'}}</text>
+        <text wx:if="{{!autoMeasureDone}}" class="auto-measure__subtitle">请保持手环佩戴，无需任何操作</text>
+      </view>
+
+      <!-- 指标列表 -->
+      <view class="auto-measure__list">
+        <view
+          wx:for="{{measureTypes}}"
+          wx:key="type"
+          class="auto-item {{autoMeasureStatus[item.type] === 'done' ? 'auto-item--done' : autoMeasureStatus[item.type] === 'measuring' ? 'auto-item--active' : autoMeasureStatus[item.type] === 'error' ? 'auto-item--error' : ''}}"
+        >
+          <view class="auto-item__left">
+            <view class="auto-item__icon-wrap" style="background: {{autoMeasureStatus[item.type] === 'done' ? item.color : autoMeasureStatus[item.type] === 'error' ? '#ccc' : item.color}}">
+              <text class="auto-item__icon">{{autoMeasureStatus[item.type] === 'done' ? '✓' : autoMeasureStatus[item.type] === 'error' ? '✕' : item.icon}}</text>
+            </view>
+            <text class="auto-item__label">{{item.label}}</text>
+          </view>
+          <view class="auto-item__right">
+            <block wx:if="{{autoMeasureStatus[item.type] === 'done'}}">
+              <text class="auto-item__value" style="color: {{item.color}}">{{autoMeasureValues[item.type]}}</text>
+              <text wx:if="{{item.unit}}" class="auto-item__unit">{{item.unit}}</text>
+            </block>
+            <text wx:elif="{{autoMeasureStatus[item.type] === 'measuring'}}" class="auto-item__status auto-item__status--active">测量中...</text>
+            <text wx:elif="{{autoMeasureStatus[item.type] === 'error'}}" class="auto-item__status auto-item__status--error">已跳过</text>
+            <text wx:else class="auto-item__status">等待中</text>
+          </view>
+        </view>
+      </view>
+
+      <!-- 进度条 -->
+      <view class="auto-progress">
+        <view class="auto-progress__bar">
+          <view class="auto-progress__fill" style="width: {{autoMeasureProgress}}%"></view>
+        </view>
+        <text class="auto-progress__text">{{autoMeasureProgress}}%</text>
+      </view>
+
+      <!-- 免责声明 -->
+      <view class="disclaimer">
+        <text class="disclaimer__text">测量数据仅供参考，不作为医学诊断依据。如有不适请及时就医。</text>
+      </view>
+
+      <!-- 操作按钮 -->
+      <view class="actions">
+        <block wx:if="{{autoMeasureDone}}">
+          <view class="btn btn--primary" bindtap="handleBack">查看结果并返回</view>
+        </block>
+        <block wx:elif="{{autoMeasuring}}">
+          <view class="btn btn--text" bindtap="handleCancelAutoMeasure">取消自动测量</view>
+        </block>
+      </view>
+    </view>
+  </view>
+</block>
+
+<!-- ═══ 就绪 + 手动测量 ═══ -->
 <block wx:elif="{{phase === 'ready'}}">
   <view class="measure-page">
     <!-- 设备状态栏 -->