fix(提交列表): 手机上好用多了：筛选里补上「这节课」、班级、只看某个学生，顶上加了统计入口；点开详情名字、题目、按钮分三行排，代码字号改小；流程图的评分不再被压成一条缝；翻页不再顶出屏幕、翻完回到顶上；电脑上「复制回到题目」「复制到自测猫」挪到右栏底栏，老师不用再进「⋯」找，题目名也不再被按钮挤没

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/web/src/shared/components/Pagination.vue

@@ -42,7 +42,7 @@ watch(
     v-model:page-size="limit"
     :page-sizes="sizes"
     :page-slot="isDesktop ? 7 : 5"
-    show-size-picker
+    :show-size-picker="isDesktop"
   />
 </template>
 <style scoped>