feat(ui): 记录页月份联动与多项 UI 美化/修复

- records: 底部列表与月份选择器联动，新增 [本月|最近] 分段控件；标题/空态随模式切换
- leaderboard: 领奖台布局(冠军居中+皇冠)、次数标注于底座且三档水平对齐；头像 cloud:// 批量预解析提速(云函数需重新部署)
- index/timer: 主色底图标改白色变体修复隐形；目标数字按微信字体缩放补偿真机遮挡
- settings: 配色方案横滑渐变色卡；头像上传前压缩至 200px
- theme: 新增 teal 主题；暗黑背景统一对齐
- 圆形头像双保险(image 自身 border-radius)修复月/年榜方图

注: cloudfunctions/leaderboard 改动须在开发者工具重新部署才生效。

pages/records/records.js

@@ -17,6 +17,7 @@ Page({
     currentMonth: new Date().getMonth() + 1,
     monthRecords: [],
     historyList: [],
+    listMode: 'month',
     showDayDetail: false,
     dayDetail: {},
     icons: iconsMod.build()
@@ -76,6 +77,8 @@ Page({
       maxDurationText: util.formatDuration(stats.maxDuration),
       monthRecords: records,
       historyList,
+      listMode: this.data.listMode || 'month',
+      displayList: (this.data.listMode || 'month') === 'month' ? records : historyList,
       loading: false
     })
   },
@@ -104,6 +107,13 @@ Page({
     this.refresh()
   },
 
+  onToggleListMode(e) {
+    const mode = e.currentTarget.dataset.mode
+    if (!mode || mode === this.data.listMode) return
+    this.setData({ listMode: mode })
+    this.refresh()
+  },
+
   onDayTap(e) {
     const { year, month, day } = e.detail
     const dateStr = `${year}-${String(month).padStart(2, '0')}-${String(day).padStart(2, '0')}`

pages/records/records.wxml

@@ -75,22 +75,26 @@
       <view class="history-header">
         <view class="history-title-wrap">
           <image class="history-title-icon" src="{{icons.formFill}}" mode="aspectFit"></image>
-          <text class="section-title">最近记录</text>
+          <text class="section-title">{{listMode === 'month' ? currentYear + '年' + currentMonth + '月记录' : '最近记录'}}</text>
+        </view>
+        <view class="rec-seg">
+          <view class="rec-seg-item {{listMode === 'month' ? 'active' : ''}}" data-mode="month" bindtap="onToggleListMode">本月</view>
+          <view class="rec-seg-item {{listMode === 'recent' ? 'active' : ''}}" data-mode="recent" bindtap="onToggleListMode">最近</view>
         </view>
-        <text class="history-hint" wx:if="{{historyList.length > 0}}">长按可删除</text>
       </view>
-      <view wx:if="{{historyList.length === 0}}" class="empty-state">
+      <text class="history-hint" wx:if="{{displayList.length > 0}}">长按可删除</text>
+      <view wx:if="{{displayList.length === 0}}" class="empty-state">
         <view class="empty-illus">
           <view class="empty-illus-body"></view>
           <view class="empty-illus-arm empty-illus-arm--l"></view>
           <view class="empty-illus-arm empty-illus-arm--r"></view>
           <view class="empty-illus-bubble">开始</view>
         </view>
-        <text class="empty-text">还没有训练记录</text>
-        <text class="empty-sub">完成第一次训练,开启你的坚持!</text>
+        <text class="empty-text">{{listMode === 'month' ? '本月还没有训练记录' : '还没有训练记录'}}</text>
+        <text class="empty-sub">{{listMode === 'month' ? '换个有训练的月份看看吧' : '完成第一次训练,开启你的坚持!'}}</text>
       </view>
       <view class="history-list">
-        <view class="history-item" wx:for="{{historyList}}" wx:key="id" data-id="{{item.id}}" bindlongpress="onLongPressDelete">
+        <view class="history-item" wx:for="{{displayList}}" wx:key="id" data-id="{{item.id}}" bindlongpress="onLongPressDelete">
           <image class="history-item-icon"
             src="{{item.duration >= 120 ? icons.hotFill : item.duration >= 60 ? icons.likeFill : icons.roundCheckFill}}"
             mode="aspectFit"

pages/records/records.wxss

@@ -109,6 +109,32 @@
 .history-hint {
   font-size: 22rpx;
   color: var(--text-secondary);
+  margin-bottom: 8rpx;
+}
+
+/* segmented control: [本月 | 最近] in the records history header.
+   Mirrors the .period-seg language used on the leaderboard/settings pages. */
+.rec-seg {
+  display: flex;
+  background: var(--bg-soft);
+  border-radius: 999rpx;
+  padding: 4rpx;
+  flex-shrink: 0;
+}
+
+.rec-seg-item {
+  padding: 8rpx 24rpx;
+  font-size: 24rpx;
+  color: var(--text-secondary);
+  border-radius: 999rpx;
+  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
+}
+
+.rec-seg-item.active {
+  background: var(--card-bg);
+  color: var(--primary);
+  font-weight: 600;
+  box-shadow: 0 2rpx 8rpx rgba(0, 0, 0, 0.10);
 }
 
 .empty-state {
@@ -256,7 +282,7 @@
 
 @media (prefers-color-scheme: dark) {
   .day-detail-body {
-    /* 暗黑下 body(#1C1C1E)与页面(#0F0F12)都偏深,加深阴影 + 微亮描边拉开层次 */
+    /* 暗黑下 body(#26262B)与页面(#131316)都偏深,加深阴影 + 微亮描边拉开层次 */
     box-shadow: 0 16rpx 48rpx rgba(0, 0, 0, 0.6), 0 0 0 1rpx rgba(255, 255, 255, 0.06);
   }
 }