fix(ui): 根治真机弹窗 fixed 降级(移出 .container + pageIn 去 transform)

根因:.page-enter 的 pageIn 动画含 transform,即使 to: transform:none,
真机 fill-mode 没真正消除 transform,.container 仍是 fixed 的包含块。
记录页内容超一屏时 mask 降级相对 .container(高>>视口),flex 居中把
弹窗放到 .container 中心(视口外),真机看不到(模拟器宽松所以正常)。

- records: 日历详情弹窗移出 .container.page-enter,fixed 相对视口;
  加 style themeStyle 拿暗黑变量
- app.wxss: pageIn keyframes 去掉 transform 只留 opacity 淡入,根治所有
  页面(settings 计划编辑器/timer 完成弹窗)的 fixed 降级
- calendar-heatmap: onDayTap 的 find 用 Number(day) 修真机 dataset
  字符串化导致 === 失败;移除诊断日志

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

components/calendar-heatmap/calendar-heatmap.js

@@ -79,13 +79,16 @@ Component({
 
     onDayTap(e) {
       const day = e.currentTarget.dataset.day
-      if (!day) return
-      const cell = this.data.weeks.flat().find(c => c && c.day === day)
+      if (!day && day !== 0) return
+      // dataset values can arrive as strings on real devices, which breaks
+      // the strict === against c.day (number). Normalize so the lookup
+      // works on both simulator and device.
+      const cell = this.data.weeks.flat().find(c => c && c.day === Number(day))
       if (!cell || cell.duration <= 0) return
       this.triggerEvent('daytap', {
         year: this.properties.year,
         month: this.properties.month,
-        day,
+        day: cell.day,
         duration: cell.duration
       })
     }