feat: 重新设计课堂总结弹框

默认看批改页当前的班级；顶部四个数字（已交、平均分、改过再交、待讲评），
未交和交了没人评的名单按班级分组并排显示；人气前五换成高分作品（每人最高的一版），
点开直接进批改页。接口去掉旧的四色标记统计和 top_viewed，新增 present_count、top_scored。

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

server/src/routes/submission.ts

@@ -448,25 +448,18 @@ router.get("/stats/:task_id", (c) => {
     else dist.count_4_plus++
   }
 
-  // 标记统计：该任务所有提交（不按学生过滤）
-  const flagStats = { red: 0, blue: 0, green: 0, yellow: 0 }
-  for (const s of subs) {
-    if (s.flag && s.flag in flagStats) flagStats[s.flag as keyof typeof flagStats]++
+  // 高分作品：每人分数最高的一份（同分取较早的），取前五
+  const best = new Map<number, (typeof subs)[number]>()
+  for (const s of studentSubs) {
+    const cur = best.get(s.user_id)
+    if (s.score > 0 && (!cur || s.score > cur.score || (s.score === cur.score && s.created < cur.created)))
+      best.set(s.user_id, s)
   }
-
-  const topViewed = classname
-    ? all(
-        `SELECT s.id, s.view_count, u.username, u.classname ${SUBMISSION_FROM}
-         WHERE s.task_id = $id AND u.role = 'normal' AND u.classname = $classname
-         ORDER BY s.view_count DESC LIMIT 5`,
-        { id: taskId, classname },
-      )
-    : all(
-        `SELECT s.id, s.view_count, u.username, u.classname ${SUBMISSION_FROM}
-         WHERE s.task_id = $id AND u.role = 'normal'
-         ORDER BY s.view_count DESC LIMIT 5`,
-        { id: taskId },
-      )
+  const studentById = new Map(students.map((s) => [s.id, s]))
+  const topScored = [...best.values()]
+    .sort((a, b) => b.score - a.score || (a.created < b.created ? -1 : 1))
+    .slice(0, 5)
+    .map((s) => ({ ...tag(studentById.get(s.user_id)!), score: s.score, submission_id: uuidOut(s.id) }))
 
   const unrated = students.filter((s) => submittedIds.has(s.id) && !ratedIds.has(s.id))
   return c.json({
@@ -477,14 +470,9 @@ router.get("/stats/:task_id", (c) => {
     unsubmitted_users: students.filter((s) => !submittedIds.has(s.id)).map(tag),
     unrated_users: unrated.map(tag),
     submission_count_distribution: dist,
-    flag_stats: flagStats,
+    present_count: studentSubs.filter((s) => s.flag === "present").length,
     classes,
-    top_viewed: topViewed.map((s) => ({
-      username: s.username,
-      classname: s.classname,
-      view_count: s.view_count,
-      submission_id: uuidOut(s.id),
-    })),
+    top_scored: topScored,
   })
 })
 

server/tests/api.test.ts

@@ -1,5 +1,5 @@
 import { beforeEach, describe, expect, test } from "bun:test"
-import { get, all } from "../src/db"
+import { get, all, run } from "../src/db"
 import { app } from "../src/app"
 import { config } from "../src/config"
 import { mkdtemp, readFile, readdir, rm } from "node:fs/promises"
@@ -609,3 +609,40 @@ describe("同学作品与批改", () => {
     expect((await teacher("PUT", `/api/submission/${uuid(latest)}/flag`, { flag: "present" })).json.flag).toBe("present")
   })
 })
+
+describe("课堂总结", () => {
+  test("按班级统计，高分作品每人只取最高的一份", async () => {
+    makeUser("adm", "admin")
+    const task = makeTask("挑战", "challenge", 1)
+    const a = makeUser("weba1小明", "normal", "a1")
+    const b = makeUser("weba1小红", "normal", "a1")
+    makeUser("weba1小刚", "normal", "a1")
+    const other = makeUser("weba2小李", "normal", "a2")
+    makeSubmission(a, task, 3, "2026-01-01 00:00:00.000000")
+    const aBest = makeSubmission(a, task, 4.5, "2026-01-02 00:00:00.000000")
+    makeSubmission(a, task, 4, "2026-01-03 00:00:00.000000")
+    const bSub = makeSubmission(b, task, 0)
+    run(`UPDATE submission_submission SET flag = 'present' WHERE id = $id`, { id: bSub })
+    makeSubmission(other, task, 5)
+
+    const adm = await client("adm")
+    const res = await adm("GET", `/api/submission/stats/${task}?classname=a1`)
+    expect(res.status).toBe(200)
+    expect(res.json).toMatchObject({
+      submitted_count: 2,
+      unsubmitted_count: 1,
+      average_score: 4,
+      unrated_count: 2,
+      present_count: 1,
+      classes: ["a1", "a2"],
+      submission_count_distribution: { count_1: 1, count_2: 0, count_3: 1, count_4_plus: 0 },
+    })
+    expect(res.json.unsubmitted_users).toEqual([{ username: "weba1小刚", classname: "a1" }])
+    expect(res.json.top_scored).toEqual([
+      { username: "weba1小明", classname: "a1", score: 4.5, submission_id: uuid(aBest) },
+    ])
+
+    const all = await adm("GET", `/api/submission/stats/${task}`)
+    expect(all.json.top_scored.map((t: any) => t.username)).toEqual(["weba2小李", "weba1小明"])
+  })
+})