feat(自学情况): 每个学生练一练做到哪了——格子分出做了一部分、点名字看逐题明细

- 方块格多一档「做了一部分」：按做对的比例从下往上涨绿，一道没做对的底下压一条橙；
  鼠标停上去是「练一练 3/5，错了 4 次」
- 「练一练」列改成 做对/应做（应做 = 他打开过的课的练一练总数）
- 点学生名字从右边滑出明细：每课一段，逐题写第几次做对、交了几次、最后错在哪；
  手机上返回键关它
- 点开一道练一练，底下多一串「读了这课还没做」的人
- 顺手修：那个弹框七列加起来比弹框宽，「最后作答」被挤没了；改成一列用户名

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

apps/web/src/admin/api.ts

@@ -12,7 +12,8 @@ import type {
   GradeTrendProblem,
   LearnBoard,
   LearnExerciseProgressList,
-  LearnExerciseAttempt,
+  LearnExerciseAttemptList,
+  LearnStudentDetail,
   AdminContestList,
   AdminUser,
   AdminUserList,
@@ -657,9 +658,14 @@ export function getLearnExercises(params: { type: "python" | "c"; className?: st
 }
 
 export function getLearnExerciseAttempts(exerciseId: number, params: { className?: string }) {
-  return api.get<LearnExerciseAttempt[]>(`admin/learn-analytics/exercises/${exerciseId}/attempts`, {
-    params,
-  })
+  return api.get<LearnExerciseAttemptList>(
+    `admin/learn-analytics/exercises/${exerciseId}/attempts`,
+    { params },
+  )
+}
+
+export function getLearnStudent(userId: number, params: { type: "python" | "c" }) {
+  return api.get<LearnStudentDetail>(`admin/learn-analytics/students/${userId}`, { params })
 }
 
 export function getGradeTrend() {