撤回孩子端单词页网格;家长端跟读录音列表改一行多个(换行排布)

- 撤回 word-day 网格改动,恢复原卡片布局
- 家长端"单词跟读录音"(课程管理+学习概览)改为圆角标签自动换行,
  一行多个,每个含单词+播放按钮

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/parent/overview-tab.tsx

@@ -157,11 +157,11 @@ export function OverviewTab({ data }: { data: OverviewData }) {
                   {cell.recs.length === 0 ? (
                     <p className="text-sm text-muted-foreground">当天无跟读录音</p>
                   ) : (
-                    <div className="space-y-1.5">
+                    <div className="flex flex-wrap gap-2">
                       {cell.recs.map((r, i) => (
-                        <div key={i} className="flex items-center gap-2 text-sm">
-                          <span className="w-20 shrink-0 font-medium text-slate-800">{r.word}</span>
-                          <PlayBtn src={r.url} />
+                        <div key={i} className="flex items-center gap-1.5 rounded-full bg-white px-2.5 py-1 text-sm ring-1 ring-slate-100">
+                          <span className="font-medium text-slate-800">{r.word}</span>
+                          <PlayBtn src={r.url} className="size-6" />
                         </div>
                       ))}
                     </div>