feat(leaderboard): 新增耐力榜(全局单次最久 top10) + 领奖台日期两行 + 顶部哲理文案

- 云函数支持 endurance 周期:遍历全部 records 取 max(duration) 及 bestDate
- 客户端新增耐力榜 tab(maxRank=10),未上榜时在底部 my-bar 显示最佳成绩+产生时间
- 领奖台底座(耐力榜)单次日期拆成「日期+时间」两行,统一三阶底座高度修复第3名贴顶
- 领奖台顶部新增哲理文案,配置进 config.js(leaderboardPodiumSlogan),斜体金句卡片样式

pages/leaderboard/leaderboard.wxml

@@ -41,6 +41,9 @@
   </view>
 
   <block wx:else>
+    <!-- 耐力榜领奖台顶部文案:哲理注脚,点出"撑得越久不一定越好" -->
+    <view class="podium-slogan" wx:if="{{activePeriod === 'endurance'}}">{{podiumSlogan}}</view>
+
     <!-- Podium: top 3 (only when there are at least 3 entries) -->
     <view class="podium" wx:if="{{rankedList.length >= 3}}">
       <!-- 2nd -->
@@ -51,7 +54,7 @@
         </view>
         <text class="podium-name">{{rankedList[1].name}}</text>
         <text class="podium-dur">{{rankedList[1].durationText}}</text>
-        <view class="podium-base podium-base--second"><text class="podium-base__label">{{rankedList[1].sessions}}次</text></view>
+        <view class="podium-base podium-base--second"><view class="podium-base__label {{activePeriod === 'endurance' ? 'is-two' : ''}}"><block wx:if="{{activePeriod === 'endurance'}}"><text class="podium-base__date">{{rankedList[1].subDate}}</text><text class="podium-base__time">{{rankedList[1].subTime}}</text></block><text wx:else>{{rankedList[1].subText}}</text></view></view>
       </view>
       <!-- 1st -->
       <view class="podium-slot podium-slot--first rank-item--enter" style="animation-delay: 0ms;">
@@ -62,7 +65,7 @@
         </view>
         <text class="podium-name podium-name--first">{{rankedList[0].name}}</text>
         <text class="podium-dur podium-dur--first">{{rankedList[0].durationText}}</text>
-        <view class="podium-base podium-base--first"><text class="podium-base__label">{{rankedList[0].sessions}}次</text></view>
+        <view class="podium-base podium-base--first"><view class="podium-base__label {{activePeriod === 'endurance' ? 'is-two' : ''}}"><block wx:if="{{activePeriod === 'endurance'}}"><text class="podium-base__date">{{rankedList[0].subDate}}</text><text class="podium-base__time">{{rankedList[0].subTime}}</text></block><text wx:else>{{rankedList[0].subText}}</text></view></view>
       </view>
       <!-- 3rd -->
       <view class="podium-slot podium-slot--third rank-item--enter" style="animation-delay: 120ms;">
@@ -72,7 +75,7 @@
         </view>
         <text class="podium-name">{{rankedList[2].name}}</text>
         <text class="podium-dur">{{rankedList[2].durationText}}</text>
-        <view class="podium-base podium-base--third"><text class="podium-base__label">{{rankedList[2].sessions}}次</text></view>
+        <view class="podium-base podium-base--third"><view class="podium-base__label {{activePeriod === 'endurance' ? 'is-two' : ''}}"><block wx:if="{{activePeriod === 'endurance'}}"><text class="podium-base__date">{{rankedList[2].subDate}}</text><text class="podium-base__time">{{rankedList[2].subTime}}</text></block><text wx:else>{{rankedList[2].subText}}</text></view></view>
       </view>
     </view>
 
@@ -91,7 +94,7 @@
         <view class="avatar avatar--sm {{item.avatarUrl ? 'has-avatar' : ''}}"><image class="avatar__img" src="{{item.avatarUrl || icons.peopleFill}}" mode="{{item.avatarUrl ? 'aspectFill' : 'aspectFit'}}"></image></view>
         <view class="rank-info">
           <text class="rank-name">{{item.name}}</text>
-          <text class="rank-sessions">{{item.sessions}}次</text>
+          <text class="rank-sessions">{{item.subText}}</text>
         </view>
         <text class="rank-dur">{{item.durationText}}</text>
       </view>
@@ -104,7 +107,7 @@
     <view class="avatar avatar--sm my-bar__avatar {{myEntry.avatarUrl ? 'has-avatar' : ''}}"><image class="avatar__img" src="{{myEntry.avatarUrl || icons.peopleFill}}" mode="{{myEntry.avatarUrl ? 'aspectFill' : 'aspectFit'}}"></image></view>
     <view class="rank-info">
       <text class="rank-name">我 ({{myEntry.name}})</text>
-      <text class="rank-sessions">{{myEntry.sessions}}次</text>
+      <text class="rank-sessions">{{myEntry.subText}}</text>
     </view>
     <text class="rank-dur">{{myEntry.durationText}}</text>
   </view>