feat(阶段3): 补齐用户侧依赖的三个 admin 端点

重判、提交统计、流程图统计这三条挂在旧后端的 admin 路由下，权限也确实是 teacher/super admin，但入口在用户侧页面里（提交列表页的重判按钮、两个统计面板）。不做完，阶段 3 的出口标准「用户侧全部功能跑在新后端上」就不成立 —— 按 URL 前缀切阶段会漏掉它们。 - POST submissions/:id/rejudge ← GET admin/submission/rejudge - GET submissions/statistics ← GET admin/submission/statistics - GET flowcharts/statistics ← GET admin/flowchart/statistics 几处对齐旧后端的细节： - AST_CHECK_FAILED(10) 与 ACCEPTED(0) 同算通过 - 完成度先用原始花名册人数算、再修正 person_count，顺序照搬，兜住「学生已删号但提交记录还在」 - 有提交但零通过的学生，两个名单里都不出现（旧后端同样口径） - 词云用 @node-rs/jieba，STOPWORDS 与 38 个自定义词逐词照搬；jieba@2 没有 insertWord，改用 loadDict 加载用户词典 - avgScore 分母是有分数的条数，对齐 Django Avg() 跳过 NULL rejudge 的 jobId 带时间戳。队列保留最近 100 个已完成任务，沿用 submissionId 做 jobId 的话 BullMQ 会认为任务已存在，重判会静默变成空操作。 correctRate 改成数值不带 %，展示格式化交给前端。stripClassPrefix 用 startsWith+slice 而不是 replace，前缀对不上时不会从中间截出乱码；site.ts 原有的 replace 写法一并改掉。 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-07 06:48:05 -06:00
parent cb6d42363b
commit 836d97847e
12 changed files with 787 additions and 233 deletions
--- a/apps/api/package.json
+++ b/apps/api/package.json
@@ -14,6 +14,7 @@
    "db:pull": "drizzle-kit pull"
  },
  "dependencies": {
+    "@node-rs/jieba": "^2.0.1",
    "@oj2/contract": "workspace:*",
    "bullmq": "^6.0.9",
    "drizzle-orm": "^0.45.2",
--- a/apps/api/src/routes/flowchart.ts
+++ b/apps/api/src/routes/flowchart.ts
@@ -7,9 +7,10 @@ import {
  flowchartDetailSchema,
  flowchartListItemSchema,
  flowchartListSchema,
+  flowchartStatisticsSchema,
  flowchartSubmissionSchema,
 } from "@oj2/contract"
-import { and, asc, count, desc, eq, ilike, sql } from "drizzle-orm"
+import { and, asc, count, desc, eq, ilike, isNull, sql } from "drizzle-orm"
 import { Hono } from "hono"

 import { requireAuth, type AppEnv } from "../auth/middleware"
@@ -17,7 +18,16 @@ import { config } from "../config"
 import { db, schema } from "../db"
 import { failure, success } from "../http"
 import { flowchartQueue } from "../queue"
-import { isAdminRole, objectValue, queryInteger, todayStart } from "./helpers"
+import { buildWordFrequencies } from "../services/word-frequency"
+import {
+  isAdminRole,
+  isTeacherOrAbove,
+  objectValue,
+  queryInteger,
+  rounded,
+  stripClassPrefix,
+  todayStart,
+} from "./helpers"

 export const flowchartRoutes = new Hono<AppEnv>()

@@ -127,6 +137,137 @@ flowchartRoutes.get("/flowcharts", requireAuth, async (c) => {
  }))
 })

+const FLOWCHART_COMPLETED = 2
+
+flowchartRoutes.get("/flowcharts/statistics", requireAuth, async (c) => {
+  if (!isTeacherOrAbove(c.get("user"))) {
+    return failure(c, 403, "permission-denied", "Teacher permission required")
+  }
+  const end = c.req.query("end")?.trim()
+  if (!end) return failure(c, 400, "invalid-request", "end is required")
+  const start = c.req.query("start")?.trim()
+
+  const filters = [
+    eq(schema.flowchartSubmission.status, FLOWCHART_COMPLETED),
+    sql`${schema.flowchartSubmission.createTime} <= ${end}`,
+  ]
+  if (start) filters.push(sql`${schema.flowchartSubmission.createTime} >= ${start}`)
+
+  const displayId = c.req.query("problemId")?.trim()
+  if (displayId) {
+    const [problem] = await db
+      .select({ id: schema.problem.id })
+      .from(schema.problem)
+      .where(and(
+        sql`lower(${schema.problem.displayId}) = lower(${displayId})`,
+        isNull(schema.problem.contestId),
+        eq(schema.problem.visible, true),
+      ))
+      .limit(1)
+    if (!problem) return failure(c, 404, "problem-not-found", "Problem does not exist")
+    filters.push(eq(schema.flowchartSubmission.problemId, problem.id))
+  }
+
+  const username = c.req.query("username")?.trim()
+  if (username) filters.push(ilike(schema.user.username, `%${username}%`))
+
+  // 只有指定了用户名才谈得上「班级人数」，不指定时分母无意义
+  const roster = username
+    ? await db
+        .select({ username: schema.user.username, className: schema.user.className })
+        .from(schema.user)
+        .where(and(
+          ilike(schema.user.username, `%${username}%`),
+          eq(schema.user.isDisabled, false),
+          eq(schema.user.adminType, "Regular User"),
+        ))
+    : []
+
+  const rows = await db
+    .select({
+      username: schema.user.username,
+      score: schema.flowchartSubmission.aiScore,
+      grade: schema.flowchartSubmission.aiGrade,
+      criteria: schema.flowchartSubmission.aiCriteriaDetails,
+      feedback: schema.flowchartSubmission.aiFeedback,
+      suggestions: schema.flowchartSubmission.aiSuggestions,
+    })
+    .from(schema.flowchartSubmission)
+    .innerJoin(schema.user, eq(schema.flowchartSubmission.userId, schema.user.id))
+    .where(and(...filters))
+
+  const empty = {
+    totalCount: 0,
+    avgScore: 0,
+    gradeDistribution: {},
+    criteriaAverages: {},
+    personCount: roster.length,
+    completedCount: 0,
+    wordFrequencies: [],
+    dataUnaccepted: [],
+  }
+  if (rows.length === 0) return success(c, flowchartStatisticsSchema.parse(empty))
+
+  const gradeDistribution: Record<string, number> = {}
+  const criteriaTotals = new Map<string, { sum: number; count: number; max: number }>()
+  const texts: string[] = []
+  const submitted = new Set<string>()
+  let scoreSum = 0
+  let scoreCount = 0
+
+  for (const row of rows) {
+    submitted.add(row.username)
+    // 旧后端用 values_list("ai_grade") 分组，null 也会成为一个桶；这里保持同样的口径
+    const grade = row.grade ?? ""
+    gradeDistribution[grade] = (gradeDistribution[grade] ?? 0) + 1
+    if (row.score !== null) {
+      scoreSum += row.score
+      scoreCount += 1
+    }
+    for (const [key, value] of Object.entries(objectValue(row.criteria))) {
+      const detail = objectValue(value)
+      if (typeof detail.score !== "number") continue
+      const bucket = criteriaTotals.get(key)
+      if (bucket) {
+        bucket.sum += detail.score
+        bucket.count += 1
+      } else {
+        // max 取第一次见到的那条，与旧后端 `if key not in criteria_max` 一致
+        criteriaTotals.set(key, {
+          sum: detail.score,
+          count: 1,
+          max: typeof detail.max === "number" ? detail.max : 100,
+        })
+      }
+      if (typeof detail.comment === "string" && detail.comment) texts.push(detail.comment)
+    }
+    if (row.feedback) texts.push(row.feedback)
+    if (row.suggestions) texts.push(row.suggestions)
+  }
+
+  const criteriaAverages: Record<string, { avg: number; max: number }> = {}
+  for (const [key, bucket] of criteriaTotals) {
+    criteriaAverages[key] = { avg: rounded(bucket.sum / bucket.count, 1), max: bucket.max }
+  }
+
+  return success(c, flowchartStatisticsSchema.parse({
+    totalCount: rows.length,
+    // 分母是有分数的条数，不是总条数 —— 对齐 Django 的 Avg()，它跳过 NULL
+    avgScore: scoreCount ? rounded(scoreSum / scoreCount, 1) : 0,
+    gradeDistribution,
+    criteriaAverages,
+    personCount: roster.length,
+    completedCount: submitted.size,
+    wordFrequencies: buildWordFrequencies(texts),
+    dataUnaccepted: roster
+      .filter((row) => !submitted.has(row.username))
+      .map((row) => ({
+        username: row.username,
+        realName: stripClassPrefix(row.username, row.className),
+      })),
+  }))
+})
+
 flowchartRoutes.get("/flowcharts/:id", requireAuth, async (c) => {
  const [row] = await db.select({ flowchart: schema.flowchartSubmission, username: schema.user.username, problem: schema.problem })
    .from(schema.flowchartSubmission).innerJoin(schema.user, eq(schema.flowchartSubmission.userId, schema.user.id))
--- a/apps/api/src/routes/helpers.ts
+++ b/apps/api/src/routes/helpers.ts
@@ -24,6 +24,22 @@ export function sampleUser(
  })
 }

+/**
+ * 去掉用户名里的 `ks<班级号>` 前缀，得到学生本人那一段：`ks251张三` + `251` → `张三`。
+ * 对齐旧后端 `utils/shortcuts.py:52` 的 `strip_class_prefix`。
+ *
+ * 用 startsWith + slice 而不是 replace：replace 会删掉字符串中间的匹配，
+ * 前缀对不上时从中间截出乱码。前缀不匹配就原样返回。
+ */
+export function stripClassPrefix(
+  username: string,
+  className: string | null | undefined,
+) {
+  if (!className) return username
+  const prefix = `ks${className}`
+  return username.startsWith(prefix) ? username.slice(prefix.length) : username
+}
+
 export function objectValue(value: unknown): Record<string, unknown> {
  return value && typeof value === "object" && !Array.isArray(value)
    ? (value as Record<string, unknown>)
--- a/apps/api/src/routes/site.ts
+++ b/apps/api/src/routes/site.ts
@@ -5,6 +5,7 @@ import { Hono } from "hono"
 import { db, schema } from "../db"
 import { failure, success } from "../http"
 import { getWebsiteOptions } from "../services/options"
+import { stripClassPrefix } from "./helpers"

 export const siteRoutes = new Hono()

@@ -43,5 +44,6 @@ siteRoutes.get("/classes/:className/usernames", async (c) => {
    .from(schema.user)
    .where(eq(schema.user.className, className))
    .orderBy(desc(schema.user.createTime), asc(schema.user.id))
-  return success(c, rows.map(({ username }) => username.replace(`ks${className}`, "")))
+  // 用 stripClassPrefix 而不是 replace：replace 会把中间的匹配也删掉，前缀对不上时截出乱码
+  return success(c, rows.map(({ username }) => stripClassPrefix(username, className)))
 })
--- a/apps/api/src/routes/submission.ts
+++ b/apps/api/src/routes/submission.ts
@@ -9,6 +9,7 @@ import {
  submissionDetailSchema,
  submissionListItemSchema,
  submissionListSchema,
+  submissionStatisticsSchema,
 } from "@oj2/contract"
 import { and, count, desc, eq, ilike, inArray, isNull, sql } from "drizzle-orm"
 import { Hono } from "hono"
@@ -29,7 +30,15 @@ import {
 import { CodeFormatError, formatCode } from "../services/format-code"
 import { getBooleanOption } from "../services/options"
 import { consumeToken } from "../services/throttling"
-import { isAdminRole, queryInteger, todayStart } from "./helpers"
+import {
+  isAdminRole,
+  isSuperAdmin,
+  isTeacherOrAbove,
+  queryInteger,
+  rounded,
+  stripClassPrefix,
+  todayStart,
+} from "./helpers"

 export const submissionRoutes = new Hono<AppEnv>()

@@ -157,6 +166,196 @@ submissionRoutes.get("/submissions/today-count", async (c) => {
  return success(c, row?.value ?? 0)
 })

+const ACCEPTED_RESULTS = [JudgeStatus.ACCEPTED, JudgeStatus.AST_CHECK_FAILED]
+
+/**
+ * 统计接口共用的时间窗解析。旧后端 `end` 必填、`start` 可选（不给就是「全部时段」）。
+ */
+function statisticsRange(c: { req: { query(name: string): string | undefined } }) {
+  const end = c.req.query("end")?.trim()
+  if (!end) return null
+  const start = c.req.query("start")?.trim()
+  return { start: start || null, end }
+}
+
+/**
+ * 按题号（展示用的 _id）定位公开题目。找不到时统计接口要报错而不是退化成「全部题目」，
+ * 否则教师打错一个字就会看到全站数据还以为是本题的。
+ */
+async function findPublicProblemByDisplayId(displayId: string) {
+  const [row] = await db
+    .select({ id: schema.problem.id })
+    .from(schema.problem)
+    .where(
+      and(
+        sql`lower(${schema.problem.displayId}) = lower(${displayId})`,
+        isNull(schema.problem.contestId),
+        eq(schema.problem.visible, true),
+      ),
+    )
+    .limit(1)
+  return row ?? null
+}
+
+/**
+ * 用户名模糊匹配到的在册学生，用来算「班级人数」和「谁没做」。
+ * 只算未禁用的普通用户 —— 教师和管理员不该出现在完成度分母里。
+ */
+async function matchedStudents(username: string) {
+  return db
+    .select({ username: schema.user.username, className: schema.user.className })
+    .from(schema.user)
+    .where(
+      and(
+        ilike(schema.user.username, `%${username}%`),
+        eq(schema.user.isDisabled, false),
+        eq(schema.user.adminType, "Regular User"),
+      ),
+    )
+}
+
+submissionRoutes.get("/submissions/statistics", requireAuth, async (c) => {
+  if (!isTeacherOrAbove(c.get("user"))) {
+    return failure(c, 403, "permission-denied", "Teacher permission required")
+  }
+  const range = statisticsRange(c)
+  if (!range) return failure(c, 400, "invalid-request", "end is required")
+
+  const filters = [
+    isNull(schema.submission.contestId),
+    sql`${schema.submission.createTime} <= ${range.end}`,
+  ]
+  if (range.start) filters.push(sql`${schema.submission.createTime} >= ${range.start}`)
+
+  const displayId = c.req.query("problemId")?.trim()
+  if (displayId) {
+    const problem = await findPublicProblemByDisplayId(displayId)
+    if (!problem) return failure(c, 404, "problem-not-found", "Problem does not exist")
+    filters.push(eq(schema.submission.problemId, problem.id))
+  }
+
+  const username = c.req.query("username")?.trim()
+  if (username) filters.push(ilike(schema.submission.username, `%${username}%`))
+  const where = and(...filters)
+
+  const acceptedFilter = sql`count(*) filter (where ${inArray(schema.submission.result, ACCEPTED_RESULTS)})`
+
+  const [[totals], perUser, rosterRows, items] = await Promise.all([
+    db
+      .select({ total: count(), accepted: acceptedFilter.mapWith(Number) })
+      .from(schema.submission)
+      .where(where),
+    db
+      .select({
+        username: schema.submission.username,
+        submissionCount: count(),
+        acceptedCount: acceptedFilter.mapWith(Number),
+      })
+      .from(schema.submission)
+      .where(where)
+      .groupBy(schema.submission.username)
+      .orderBy(desc(count())),
+    // 只有指定了用户名才有「班级人数」这个概念；不指定时分母无意义，旧后端也返回 0
+    username ? matchedStudents(username) : Promise.resolve([]),
+    db
+      .select({
+        username: schema.submission.username,
+        id: schema.submission.id,
+        result: schema.submission.result,
+      })
+      .from(schema.submission)
+      .where(where)
+      .orderBy(desc(schema.submission.createTime)),
+  ])
+
+  const submissionCount = totals?.total ?? 0
+  const acceptedCount = totals?.accepted ?? 0
+
+  const itemsByUser = new Map<string, { id: string; result: number }[]>()
+  for (const item of items) {
+    const bucket = itemsByUser.get(item.username)
+    if (bucket) bucket.push({ id: item.id, result: item.result })
+    else itemsByUser.set(item.username, [{ id: item.id, result: item.result }])
+  }
+
+  const submittedUsernames = new Set(perUser.map((row) => row.username))
+  const classNames = new Map<string, string | null>()
+  if (submittedUsernames.size) {
+    const rows = await db
+      .select({ username: schema.user.username, className: schema.user.className })
+      .from(schema.user)
+      .where(inArray(schema.user.username, [...submittedUsernames]))
+    for (const row of rows) classNames.set(row.username, row.className)
+  }
+
+  // 只列出有正确提交的人。做了但一次没对的学生落在「未完成」那一栏
+  const data = perUser
+    .filter((row) => row.acceptedCount > 0)
+    .map((row) => ({
+      username: row.username,
+      className: classNames.get(row.username) ?? null,
+      submissionCount: row.submissionCount,
+      acceptedCount: row.acceptedCount,
+      correctRate: rounded((row.acceptedCount / row.submissionCount) * 100),
+      submissionItems: itemsByUser.get(row.username) ?? [],
+    }))
+
+  const dataUnaccepted = rosterRows
+    .filter((row) => !submittedUsernames.has(row.username))
+    .map((row) => ({
+      username: row.username,
+      realName: stripClassPrefix(row.username, row.className),
+    }))
+
+  // 顺序照搬旧后端：先用原始 person_count 算完成度，再修正 person_count。
+  // 修正是为了兜住「学生已删号但提交记录还在」——那时完成人数会大于花名册人数。
+  let personCount = rosterRows.length
+  let personRate = 0
+  if (personCount) {
+    personRate = Math.min(100, rounded((data.length / personCount) * 100))
+    if (personCount < data.length) personCount = data.length
+  }
+
+  return success(
+    c,
+    submissionStatisticsSchema.parse({
+      submissionCount,
+      acceptedCount,
+      correctRate: submissionCount ? rounded((acceptedCount / submissionCount) * 100) : 0,
+      personCount,
+      personRate,
+      data,
+      dataUnaccepted,
+    }),
+  )
+})
+
+submissionRoutes.post("/submissions/:id/rejudge", requireAuth, async (c) => {
+  if (!isSuperAdmin(c.get("user"))) {
+    return failure(c, 403, "permission-denied", "Super admin permission required")
+  }
+  const [row] = await db
+    .select({ id: schema.submission.id, problemId: schema.submission.problemId })
+    .from(schema.submission)
+    .where(and(eq(schema.submission.id, c.req.param("id")), isNull(schema.submission.contestId)))
+    .limit(1)
+  if (!row) return failure(c, 404, "submission-not-found", "Submission does not exist")
+
+  await db
+    .update(schema.submission)
+    .set({ statisticInfo: {}, result: JudgeStatus.PENDING })
+    .where(eq(schema.submission.id, row.id))
+
+  // jobId 必须带时间戳。队列保留最近 100 个已完成任务，沿用 submissionId 做 jobId 的话
+  // BullMQ 会认为这个任务已经存在，重判静默变成空操作。与 flowcharts/:id/retry 同一处理。
+  await judgeQueue.add(
+    "judge",
+    { submissionId: row.id, problemId: row.problemId },
+    { jobId: `${row.id}:rejudge:${Date.now()}` },
+  )
+  return success(c, null)
+})
+
 submissionRoutes.post("/code/format", requireAuth, async (c) => {
  const parsed = formatCodeRequestSchema.safeParse(await c.req.json().catch(() => null))
  if (!parsed.success) return failure(c, 400, "invalid-request", "Invalid format payload")
--- a/apps/api/src/services/word-frequency.ts
+++ b/apps/api/src/services/word-frequency.ts
@@ -0,0 +1,67 @@
+import { Jieba } from "@node-rs/jieba"
+import { dict } from "@node-rs/jieba/dict"
+
+/**
+ * 流程图评语词云的分词。对齐旧后端 `flowchart/views/admin.py` 的
+ * STOPWORDS / CUSTOM_WORDS / _build_word_frequencies 三段。
+ *
+ * 停用词表逐词照搬，改一个词就会让词云和旧后端对不上 —— 教师是拿它横向比不同班级的，
+ * 词表变了历史截图就没法比。
+ */
+const STOPWORDS = new Set(
+  (
+    "的 了 是 在 和 有 就 不 也 都 要 会 这 那 到 说 上 为 与 及 等 " +
+    "把 被 从 而 所 但 如 又 或 很 更 还 让 对 已 向 只 能 以 中 可以 " +
+    "可能 需要 没有 使用 进行 注意 建议 应该 考虑 整体 基本 部分 " +
+    "一个 一些 一下 一定 一种 这个 所有 其他 比较 存在 明确 " +
+    "正确 良好 清晰 合理 较好 不错 符合 标准 "
+  )
+    .split(" ")
+    .filter(Boolean),
+)
+
+const CUSTOM_WORDS = [
+  "循环结构", "条件判断", "判断条件", "结束条件", "循环条件",
+  "异常处理", "边界条件", "输入输出", "输入验证", "开始结束",
+  "结束节点", "开始节点", "判断节点", "流程走向", "逻辑错误",
+  "逻辑缺陷", "逻辑不清", "缺少分支", "缺少步骤", "缺少判断",
+  "缺少循环", "死循环", "无限循环", "循环出口", "循环体",
+  "条件分支", "分支结构", "分支不全", "分支缺失", "符号使用",
+  "符号不规范", "连线混乱", "变量初始化", "赋值操作", "累加操作",
+  "终止条件", "退出条件", "返回值",
+]
+
+/**
+ * 词典加载有一次性开销（约 100ms），放在模块级会拖慢 API 冷启动，
+ * 而词云只有教师偶尔点一次。改成首次调用时才建。
+ */
+let instance: Jieba | null = null
+
+function jieba() {
+  if (instance) return instance
+  const built = Jieba.withDict(dict)
+  // 对应旧后端的 jieba.add_word(w, freq=9999)。
+  // @node-rs/jieba@2 没有导出 insertWord/addWord，改用用户词典缓冲区，格式为「词 词频」。
+  built.loadDict(
+    Buffer.from(CUSTOM_WORDS.map((word) => `${word} 9999`).join("\n") + "\n"),
+  )
+  instance = built
+  return built
+}
+
+export function buildWordFrequencies(texts: string[], topN = 80) {
+  const counter = new Map<string, number>()
+  const cutter = jieba()
+  for (const raw of texts) {
+    const text = raw.replaceAll("【重点】", "")
+    for (const token of cutter.cut(text)) {
+      const word = token.trim()
+      if (word.length < 2 || STOPWORDS.has(word)) continue
+      counter.set(word, (counter.get(word) ?? 0) + 1)
+    }
+  }
+  return [...counter]
+    .sort((a, b) => b[1] - a[1])
+    .slice(0, topN)
+    .map(([word, count]) => ({ word, count }))
+}
--- a/apps/web/src/oj/api.ts
+++ b/apps/web/src/oj/api.ts
@@ -2,9 +2,10 @@ import {
  createSubmissionResponseSchema,
  problemDetailSchema,
  submissionDetailSchema,
+  type FlowchartStatistics,
+  type SubmissionStatistics,
 } from "@oj2/contract"
 import api2 from "utils/api2"
-import http from "utils/http"
 import type { ApiResponse } from "utils/http"
 import { filterResult } from "oj/transforms"
 import type {
@@ -30,7 +31,9 @@ function toLegacy<T>(value: unknown): T {
  ) as T
 }

-async function legacyResponse<T>(request: Promise<ApiResponse<unknown>>): Promise<ApiResponse<T>> {
+async function legacyResponse<T>(
+  request: Promise<ApiResponse<unknown>>,
+): Promise<ApiResponse<T>> {
  const response = await request
  return { error: response.error, data: toLegacy<T>(response.data) }
 }
@@ -117,11 +120,13 @@ export async function getProblemList(
 }

 export function getAuthors(all = false) {
-  return legacyResponse(api2.get("problem-authors", {
-    params: {
-      all: all ? "1" : "0",
-    },
-  }))
+  return legacyResponse(
+    api2.get("problem-authors", {
+      params: {
+        all: all ? "1" : "0",
+      },
+    }),
+  )
 }

 export function getRandomProblemID() {
@@ -132,9 +137,7 @@ export async function getProblem(problemID: string, contestID: string) {
  const endpoint = contestID
    ? `contests/${encodeURIComponent(contestID)}/problems/${encodeURIComponent(problemID)}`
    : `problems/${encodeURIComponent(problemID)}`
-  const response = await api2.get<unknown>(
-    endpoint,
-  )
+  const response = await api2.get<unknown>(endpoint)
  return { error: null, data: detailProblem(response.data) }
 }

@@ -200,17 +203,23 @@ export function getSubmissions(params: Partial<SubmissionListPayload>) {
  const endpoint = params.contest_id
    ? `contests/${encodeURIComponent(params.contest_id)}/submissions`
    : "submissions"
-  return legacyResponse(api2.get(endpoint, { params: {
-    ...params,
-    problemId: params.problem_id,
-    contest_id: undefined,
-    problem_id: undefined,
-    page: undefined,
-  } }))
+  return legacyResponse(
+    api2.get(endpoint, {
+      params: {
+        ...params,
+        problemId: params.problem_id,
+        contest_id: undefined,
+        problem_id: undefined,
+        page: undefined,
+      },
+    }),
+  )
 }

 export function getRankOfProblem(problem_id: string) {
-  return legacyResponse(api2.get(`problems/${encodeURIComponent(problem_id)}/rank`))
+  return legacyResponse(
+    api2.get(`problems/${encodeURIComponent(problem_id)}/rank`),
+  )
 }

 export function getTodaySubmissionCount(language?: string) {
@@ -218,9 +227,7 @@ export function getTodaySubmissionCount(language?: string) {
 }

 export function adminRejudge(id: string) {
-  return http.get("admin/submission/rejudge", {
-    params: { id },
-  })
+  return api2.post(`submissions/${encodeURIComponent(id)}/rejudge`)
 }

 export function getSubmissionStatistics(
@@ -228,12 +235,8 @@ export function getSubmissionStatistics(
  problemID?: string,
  username?: string,
 ) {
-  return http.get("admin/submission/statistics", {
-    params: {
-      ...duration,
-      problem_id: problemID,
-      username,
-    },
+  return api2.get<SubmissionStatistics>("submissions/statistics", {
+    params: { ...duration, problemId: problemID, username },
  })
 }

@@ -243,9 +246,11 @@ export function getRank(
  n: number,
  username?: string,
 ) {
-  return legacyResponse(api2.get("rankings/users", {
-    params: { offset, limit, username, top: n },
-  }))
+  return legacyResponse(
+    api2.get("rankings/users", {
+      params: { offset, limit, username, top: n },
+    }),
+  )
 }

 export function getActivityRank(start: string) {
@@ -255,9 +260,11 @@ export function getActivityRank(start: string) {
 }

 export function getClassRank(grade?: number | null) {
-  return legacyResponse(api2.get("rankings/classes", {
-    params: { grade },
-  }))
+  return legacyResponse(
+    api2.get("rankings/classes", {
+      params: { grade },
+    }),
+  )
 }

 export function getUserClassRank(
@@ -265,7 +272,9 @@ export function getUserClassRank(
  offset?: number,
  limit?: number,
 ) {
-  return legacyResponse(api2.get("me/class-rank", { params: { scope, offset, limit } }))
+  return legacyResponse(
+    api2.get("me/class-rank", { params: { scope, offset, limit } }),
+  )
 }

 export function getClassPK(
@@ -304,11 +313,15 @@ export function getContestAccess(id: string) {
 }

 export function checkContestPassword(contestID: string, password: string) {
-  return api2.post(`contests/${encodeURIComponent(contestID)}/access`, { password })
+  return api2.post(`contests/${encodeURIComponent(contestID)}/access`, {
+    password,
+  })
 }

 export async function getContestProblems(contestID: string) {
-  const res = await api2.get<any[]>(`contests/${encodeURIComponent(contestID)}/problems`)
+  const res = await api2.get<any[]>(
+    `contests/${encodeURIComponent(contestID)}/problems`,
+  )
  return res.data.map(listProblem).map(filterResult)
 }

@@ -316,17 +329,20 @@ export function getContestRank(
  contestID: string,
  query: { limit: number; offset: number },
 ) {
-  return legacyResponse<any>(api2.get(`contests/${encodeURIComponent(contestID)}/rank`, { params: query }))
-    .then((response) => ({
-      ...response,
-      data: {
-        ...response.data,
-        results: response.data.results.map((item: any) => ({
-          ...item,
-          contest: item.contest_id,
-        })),
-      },
-    }))
+  return legacyResponse<any>(
+    api2.get(`contests/${encodeURIComponent(contestID)}/rank`, {
+      params: query,
+    }),
+  ).then((response) => ({
+    ...response,
+    data: {
+      ...response.data,
+      results: response.data.results.map((item: any) => ({
+        ...item,
+        contest: item.contest_id,
+      })),
+    },
+  }))
 }

 export function uploadAvatar(file: File) {
@@ -338,14 +354,18 @@ export function uploadAvatar(file: File) {
 }

 export function updateProfile(data: { real_name: string; mood: string }) {
-  return legacyResponse(api2.put("me/profile", {
-    realName: data.real_name,
-    mood: data.mood,
-  }))
+  return legacyResponse(
+    api2.put("me/profile", {
+      realName: data.real_name,
+      mood: data.mood,
+    }),
+  )
 }

 export function getAnnouncementList(offset = 0, limit = 10) {
-  return legacyResponse(api2.get("announcements", { params: { limit, offset } }))
+  return legacyResponse(
+    api2.get("announcements", { params: { limit, offset } }),
+  )
 }

 export function getAnnouncement(id: number) {
@@ -394,17 +414,19 @@ export function getTutorials(type: "python" | "c") {
 }

 export function getAIDetailData(start: string, end: string, username?: string) {
-  return legacyResponse<any>(api2.get("ai/detail", { params: { start, end, username } }))
-    .then((response) => ({
-      ...response,
-      data: {
-        ...response.data,
-        flowcharts: response.data.flowcharts?.map((item: any) => ({
+  return legacyResponse<any>(
+    api2.get("ai/detail", { params: { start, end, username } }),
+  ).then((response) => ({
+    ...response,
+    data: {
+      ...response.data,
+      flowcharts:
+        response.data.flowcharts?.map((item: any) => ({
          ...item,
          problem__id: item.problem_id,
        })) ?? [],
-      },
-    }))
+    },
+  }))
 }

 export function getAIDurationData(
@@ -412,7 +434,9 @@ export function getAIDurationData(
  duration: string,
  username?: string,
 ) {
-  return legacyResponse(api2.get("ai/duration", { params: { end, duration, username } }))
+  return legacyResponse(
+    api2.get("ai/duration", { params: { end, duration, username } }),
+  )
 }

 export function getAIHeatmapData(username?: string) {
@@ -430,8 +454,12 @@ export function getAIPinnedReport() {
 // ==================== 相似题目推荐 ====================

 export function getSimilarProblems(problemId: string) {
-  return api2.get<any[]>(`problems/${encodeURIComponent(problemId)}/similar`)
-    .then((response) => ({ ...response, data: response.data.map(listProblem).map(filterResult) }))
+  return api2
+    .get<any[]>(`problems/${encodeURIComponent(problemId)}/similar`)
+    .then((response) => ({
+      ...response,
+      data: response.data.map(listProblem).map(filterResult),
+    }))
 }

 export interface YearlyACData {
@@ -442,7 +470,9 @@ export interface YearlyACData {
 }

 export function getProblemYearlyAC(problemId: string) {
-  return legacyResponse<YearlyACData[]>(api2.get(`problems/${encodeURIComponent(problemId)}/yearly-ac`))
+  return legacyResponse<YearlyACData[]>(
+    api2.get(`problems/${encodeURIComponent(problemId)}/yearly-ac`),
+  )
 }

 // ==================== 流程图相关API ====================
@@ -452,11 +482,13 @@ export function submitFlowchart(data: {
  mermaid_code: string
  flowchart_data: any // 这个是压缩之后的，元数据太长了
 }) {
-  return legacyResponse(api2.post("flowcharts", {
-    problemId: data.problem_id,
-    mermaidCode: data.mermaid_code,
-    flowchartData: data.flowchart_data,
-  }))
+  return legacyResponse(
+    api2.post("flowcharts", {
+      problemId: data.problem_id,
+      mermaidCode: data.mermaid_code,
+      flowchartData: data.flowchart_data,
+    }),
+  )
 }

 function legacyFlowchart(value: unknown) {
@@ -482,11 +514,15 @@ export function getFlowchartSubmissions(params: {
  today?: string
  grade?: string
 }) {
-  return legacyResponse<any>(api2.get("flowcharts", { params: {
-    ...params,
-    problemId: params.problem_id,
-    problem_id: undefined,
-  } }))
+  return legacyResponse<any>(
+    api2.get("flowcharts", {
+      params: {
+        ...params,
+        problemId: params.problem_id,
+        problem_id: undefined,
+      },
+    }),
+  )
 }

 export function getFlowchartStatistics(
@@ -494,30 +530,36 @@ export function getFlowchartStatistics(
  problemID?: string,
  username?: string,
 ) {
-  return http.get("admin/flowchart/statistics", {
-    params: {
-      ...duration,
-      problem_id: problemID,
-      username,
-    },
+  return api2.get<FlowchartStatistics>("flowcharts/statistics", {
+    params: { ...duration, problemId: problemID, username },
  })
 }

 export function retryFlowchartSubmission(submissionId: string) {
-  return legacyResponse(api2.post(`flowcharts/${encodeURIComponent(submissionId)}/retry`))
+  return legacyResponse(
+    api2.post(`flowcharts/${encodeURIComponent(submissionId)}/retry`),
+  )
 }

 export function getCurrentProblemFlowchartSubmission(problemId: number) {
  return api2.get(`problems/${problemId}/flowchart/current`)
 }

-export async function getFlowchartSubmissionDetail(problemId: number, page = 0) {
-  const response = await api2.get<any>(`problems/${problemId}/flowchart/history`, { params: { page } })
+export async function getFlowchartSubmissionDetail(
+  problemId: number,
+  page = 0,
+) {
+  const response = await api2.get<any>(
+    `problems/${problemId}/flowchart/history`,
+    { params: { page } },
+  )
  return {
    ...response,
    data: {
      ...response.data,
-      submission: response.data.submission ? legacyFlowchart(response.data.submission) : null,
+      submission: response.data.submission
+        ? legacyFlowchart(response.data.submission)
+        : null,
    },
  }
 }
@@ -531,22 +573,26 @@ export function getProblemSetList(
  difficulty = "",
  status = "",
 ) {
-  return legacyResponse<any>(api2.get("problem-sets", {
-    params: {
-      offset,
-      limit,
-      keyword,
-      difficulty,
-      status,
-    },
-  })).then(mapProblemSetResponse)
+  return legacyResponse<any>(
+    api2.get("problem-sets", {
+      params: {
+        offset,
+        limit,
+        keyword,
+        difficulty,
+        status,
+      },
+    }),
+  ).then(mapProblemSetResponse)
 }

 export function getProblemSetDetail(id: number) {
-  return legacyResponse<any>(api2.get(`problem-sets/${id}`)).then((response) => ({
-    ...response,
-    data: legacyProblemSet(response.data),
-  }))
+  return legacyResponse<any>(api2.get(`problem-sets/${id}`)).then(
+    (response) => ({
+      ...response,
+      data: legacyProblemSet(response.data),
+    }),
+  )
 }

 function legacyBadge(value: any) {
@@ -571,7 +617,9 @@ function mapProblemSetResponse(response: ApiResponse<any>) {
 }

 export async function getProblemSetProblems(problemSetId: number) {
-  const response = await legacyResponse<any[]>(api2.get(`problem-sets/${problemSetId}/problems`))
+  const response = await legacyResponse<any[]>(
+    api2.get(`problem-sets/${problemSetId}/problems`),
+  )
  return {
    ...response,
    data: response.data.map((item) => ({
@@ -594,19 +642,20 @@ export function updateProblemSetProgress(
  problemId: number,
  submissionId: string,
 ) {
-  return legacyResponse(api2.put("problem-set-progress", {
-    problemSetId,
-    problemId,
-    submissionId,
-  })
+  return legacyResponse(
+    api2.put("problem-set-progress", {
+      problemSetId,
+      problemId,
+      submissionId,
+    }),
  )
 }

 // 获取用户徽章列表
 export async function getUserBadges(username?: string) {
-  const response = await legacyResponse<any[]>(api2.get(
-    `users/${encodeURIComponent(username ?? "me")}/badges`,
-  ))
+  const response = await legacyResponse<any[]>(
+    api2.get(`users/${encodeURIComponent(username ?? "me")}/badges`),
+  )
  return {
    ...response,
    data: response.data.map((item) => ({
@@ -619,7 +668,9 @@ export async function getUserBadges(username?: string) {

 // 获取题单徽章列表
 export async function getProblemSetBadges(problemSetId: number) {
-  const response = await legacyResponse<any[]>(api2.get(`problem-sets/${problemSetId}/badges`))
+  const response = await legacyResponse<any[]>(
+    api2.get(`problem-sets/${problemSetId}/badges`),
+  )
  return { ...response, data: response.data.map(legacyBadge) }
 }

@@ -633,14 +684,16 @@ export function getProblemSetUserProgress(
    completion_status?: "" | "completed" | "in_progress" | "not_started"
  },
 ) {
-  return legacyResponse(api2.get(`problem-sets/${problemSetId}/user-progress`, {
-    params: {
-      limit: params?.limit,
-      offset: params?.offset,
-      className: params?.class_name,
-      completionStatus: params?.completion_status,
-    },
-  }))
+  return legacyResponse(
+    api2.get(`problem-sets/${problemSetId}/user-progress`, {
+      params: {
+        limit: params?.limit,
+        offset: params?.offset,
+        className: params?.class_name,
+        completionStatus: params?.completion_status,
+      },
+    }),
+  )
 }

 export async function getExercises(tutorialId: number): Promise<Exercise[]> {
--- a/apps/web/src/shared/components/FlowchartStatisticsPanel.vue
+++ b/apps/web/src/shared/components/FlowchartStatisticsPanel.vue
@@ -21,37 +21,37 @@
  </n-flex>

  <n-empty
-    v-if="data.total_count === 0"
+    v-if="data.totalCount === 0"
    description="暂无数据"
    style="margin: 40px 0"
  />

-  <template v-if="data.total_count > 0">
+  <template v-if="data.totalCount > 0">
    <n-divider style="margin: 16px 0" />
    <n-flex justify="space-around">
      <div class="stat-item">
        <n-text>总提交</n-text>
        <n-gradient-text type="info" font-size="28">
-          {{ data.total_count }}
+          {{ data.totalCount }}
        </n-gradient-text>
      </div>
      <div class="stat-item">
        <n-text>平均分</n-text>
        <n-gradient-text type="primary" font-size="28">
-          {{ data.avg_score }}
+          {{ data.avgScore }}
        </n-gradient-text>
      </div>
-      <template v-if="data.person_count > 0">
+      <template v-if="data.personCount > 0">
        <div class="stat-item">
          <n-text>完成人数</n-text>
          <n-gradient-text type="error" font-size="28">
-            {{ data.completed_count }}
+            {{ data.completedCount }}
          </n-gradient-text>
        </div>
        <div class="stat-item">
          <n-text>班级人数</n-text>
          <n-gradient-text type="warning" font-size="28">
-            {{ data.person_count }}
+            {{ data.personCount }}
          </n-gradient-text>
        </div>
        <div class="stat-item">
@@ -76,7 +76,7 @@
            </n-card>
          </n-gi>
          <!-- 3. Completion doughnut -->
-          <n-gi v-if="data.person_count > 0">
+          <n-gi v-if="data.personCount > 0">
            <n-card title="班级完成度">
              <div class="chart-container">
                <Doughnut
@@ -95,7 +95,7 @@
            </n-card>
          </n-gi>
          <!-- 4. Criteria bar chart (only when class exists, pairs with radar) -->
-          <n-gi v-if="data.person_count > 0 && hasRadarData">
+          <n-gi v-if="data.personCount > 0 && hasRadarData">
            <n-card title="各维度平均得分">
              <div class="chart-container">
                <Bar :data="criteriaBarChartData" :options="barOptions" />
@@ -103,7 +103,7 @@
            </n-card>
          </n-gi>
          <!-- 4. Word cloud -->
-          <n-gi :span="2" v-if="data.word_frequencies.length > 0">
+          <n-gi :span="2" v-if="data.wordFrequencies.length > 0">
            <n-card title="常见问题高频词">
              <div class="wordcloud-container">
                <canvas ref="wordcloudCanvas"></canvas>
@@ -114,7 +114,7 @@
      </n-tab-pane>

      <n-tab-pane
-        v-if="data.data_unaccepted.length > 0"
+        v-if="data.dataUnaccepted.length > 0"
        name="unaccepted"
        :tab="`未完成（${visibleUnaccepted.length}）`"
      >
@@ -148,9 +148,9 @@
              style="font-size: 20px"
              @close="hideStudent(item.username)"
            >
-              {{ item.real_name }}
+              {{ item.realName }}
            </n-tag>
-            <span v-else style="font-size: 24px">{{ item.real_name }}</span>
+            <span v-else style="font-size: 24px">{{ item.realName }}</span>
          </template>
        </n-flex>
      </n-tab-pane>
@@ -160,6 +160,7 @@

 <script setup lang="ts">
 import { formatISO, sub, type Duration } from "date-fns"
+import type { FlowchartStatistics } from "@oj2/contract"
 import { getFlowchartStatistics } from "oj/api"
 import { DURATION_OPTIONS } from "utils/constants"
 import { Doughnut, Radar, Bar } from "vue-chartjs"
@@ -216,26 +217,15 @@ const query = reactive({
  duration: durationOptions[0].value,
 })

-interface StatisticsData {
-  total_count: number
-  avg_score: number
-  grade_distribution: Record<string, number>
-  criteria_averages: Record<string, { avg: number; max: number }>
-  person_count: number
-  completed_count: number
-  word_frequencies: { word: string; count: number }[]
-  data_unaccepted: { username: string; real_name: string }[]
-}
-
-const data = reactive<StatisticsData>({
-  total_count: 0,
-  avg_score: 0,
-  grade_distribution: {},
-  criteria_averages: {},
-  person_count: 0,
-  completed_count: 0,
-  word_frequencies: [],
-  data_unaccepted: [],
+const data = reactive<FlowchartStatistics>({
+  totalCount: 0,
+  avgScore: 0,
+  gradeDistribution: {},
+  criteriaAverages: {},
+  personCount: 0,
+  completedCount: 0,
+  wordFrequencies: [],
+  dataUnaccepted: [],
 })

 const wordcloudCanvas = useTemplateRef<HTMLCanvasElement>("wordcloudCanvas")
@@ -274,7 +264,7 @@ function showAll() {

 const visibleUnaccepted = computed(() => {
  const now = Date.now()
-  return data.data_unaccepted.filter((item) => {
+  return data.dataUnaccepted.filter((item) => {
    const exp = hiddenStudents.value[item.username]
    return !exp || exp <= now
  })
@@ -282,14 +272,14 @@ const visibleUnaccepted = computed(() => {

 const hiddenCount = computed(() => {
  const now = Date.now()
-  return data.data_unaccepted.filter((item) => {
+  return data.dataUnaccepted.filter((item) => {
    const exp = hiddenStudents.value[item.username]
    return !!exp && exp > now
  }).length
 })

 const adjustedPersonCount = computed(() =>
-  Math.max(0, data.person_count - hiddenCount.value),
+  Math.max(0, data.personCount - hiddenCount.value),
 )

 onMounted(() => {
@@ -305,7 +295,7 @@ const completionRate = computed(() => {
  if (adjustedPersonCount.value <= 0) return "0%"
  const rate = Math.min(
    100,
-    (data.completed_count / adjustedPersonCount.value) * 100,
+    (data.completedCount / adjustedPersonCount.value) * 100,
  )
  return `${Math.round(rate * 100) / 100}%`
 })
@@ -319,10 +309,8 @@ const GRADE_COLORS: Record<string, { bg: string; border: string }> = {

 const gradeChartData = computed(() => {
  const grades = ["S", "A", "B", "C"]
-  const counts = grades.map((g) => data.grade_distribution[g] || 0)
-  const labels = grades.map(
-    (g) => `${g}级 (${data.grade_distribution[g] || 0})`,
-  )
+  const counts = grades.map((g) => data.gradeDistribution[g] || 0)
+  const labels = grades.map((g) => `${g}级 (${data.gradeDistribution[g] || 0})`)
  return {
    labels,
    datasets: [
@@ -339,13 +327,13 @@ const gradeChartData = computed(() => {
 const completionChartData = computed(() => {
  const uncompleted = Math.max(
    0,
-    adjustedPersonCount.value - data.completed_count,
+    adjustedPersonCount.value - data.completedCount,
  )
  return {
    labels: ["已完成", "未完成"],
    datasets: [
      {
-        data: [data.completed_count, uncompleted],
+        data: [data.completedCount, uncompleted],
        backgroundColor: ["rgba(106, 176, 76, 0.6)", "rgba(255, 159, 64, 0.6)"],
        borderColor: ["rgba(106, 176, 76, 1)", "rgba(255, 159, 64, 1)"],
        borderWidth: 2,
@@ -379,13 +367,13 @@ const doughnutOptions = {
 const CRITERIA_ORDER = ["逻辑正确性", "完整性", "规范性", "清晰度"]

 const hasRadarData = computed(() =>
-  CRITERIA_ORDER.some((k) => k in data.criteria_averages),
+  CRITERIA_ORDER.some((k) => k in data.criteriaAverages),
 )

 const radarChartData = computed(() => {
  const labels = CRITERIA_ORDER
  const values = CRITERIA_ORDER.map((k) => {
-    const item = data.criteria_averages[k]
+    const item = data.criteriaAverages[k]
    if (!item) return 0
    return Math.round((item.avg / item.max) * 100)
  })
@@ -420,7 +408,7 @@ const radarOptions = {
      callbacks: {
        label(context: any) {
          const key = CRITERIA_ORDER[context.dataIndex]
-          const item = data.criteria_averages[key]
+          const item = data.criteriaAverages[key]
          if (!item) return ""
          return `${key}: ${item.avg}/${item.max} (${context.parsed.r}%)`
        },
@@ -430,13 +418,13 @@ const radarOptions = {
 }

 const criteriaBarChartData = computed(() => {
-  const labels = CRITERIA_ORDER.filter((k) => k in data.criteria_averages)
+  const labels = CRITERIA_ORDER.filter((k) => k in data.criteriaAverages)
  return {
    labels,
    datasets: [
      {
        label: "平均得分",
-        data: labels.map((k) => data.criteria_averages[k]?.avg ?? 0),
+        data: labels.map((k) => data.criteriaAverages[k]?.avg ?? 0),
        backgroundColor: labels.map(
          (_, i) => GRADE_COLORS[["S", "A", "B", "C"][i]].bg,
        ),
@@ -461,7 +449,7 @@ const barOptions = {
      callbacks: {
        label(context: any) {
          const key = context.label
-          const item = data.criteria_averages[key]
+          const item = data.criteriaAverages[key]
          if (!item) return ""
          return `${item.avg} / ${item.max}`
        },
@@ -484,14 +472,14 @@ const WORD_COLORS = [
 ]

 function renderWordCloud() {
-  if (!wordcloudCanvas.value || data.word_frequencies.length === 0) return
+  if (!wordcloudCanvas.value || data.wordFrequencies.length === 0) return

  if (wordcloudChart) {
    wordcloudChart.destroy()
    wordcloudChart = null
  }

-  const words = data.word_frequencies
+  const words = data.wordFrequencies
  const maxCount = Math.max(...words.map((w) => w.count))

  wordcloudChart = new ChartJS(wordcloudCanvas.value, {
--- a/apps/web/src/shared/components/StatisticsPanel.vue
+++ b/apps/web/src/shared/components/StatisticsPanel.vue
@@ -46,9 +46,9 @@
      </div>
      <div class="stat-item">
        <n-text>正确率</n-text>
-        <n-gradient-text type="warning" font-size="28">{{
-          count.rate
-        }}</n-gradient-text>
+        <n-gradient-text type="warning" font-size="28"
+          >{{ count.rate }}%</n-gradient-text
+        >
      </div>
      <template v-if="person.count > 0">
        <div class="stat-item">
@@ -140,9 +140,9 @@
              style="font-size: 20px"
              @close="hideStudent(item.username)"
            >
-              {{ item.real_name }}
+              {{ item.realName }}
            </n-tag>
-            <span v-else style="font-size: 24px">{{ item.real_name }}</span>
+            <span v-else style="font-size: 24px">{{ item.realName }}</span>
          </template>
        </n-flex>
      </n-tab-pane>
@@ -158,7 +158,7 @@ import { Doughnut } from "vue-chartjs"
 import { Chart as ChartJS, ArcElement, Title, Tooltip, Legend } from "chart.js"
 import { NButton, NFlex, NText, type DataTableRowKey } from "naive-ui"
 import { JUDGE_STATUS } from "utils/constants"
-import type { SUBMISSION_RESULT } from "utils/types"
+import type { SubmissionStatisticsUser, UnacceptedStudent } from "@oj2/contract"

 // 注册 Chart.js 组件
 ChartJS.register(ArcElement, Title, Tooltip, Legend)
@@ -182,12 +182,12 @@ function openSubmission(id: string) {
  window.open(`/submission/${id}`, "_blank", "noopener")
 }

-const columns: DataTableColumn<UserStatistic>[] = [
+const columns: DataTableColumn<SubmissionStatisticsUser>[] = [
  {
    type: "expand",
    renderExpand: (row) => {
      return h(NFlex, { size: "small", wrap: true }, () =>
-        row.submission_items.map((item) =>
+        row.submissionItems.map((item) =>
          h(
            NButton,
            {
@@ -207,9 +207,14 @@ const columns: DataTableColumn<UserStatistic>[] = [
    },
  },
  { title: "用户", key: "username" },
-  { title: "提交数", key: "submission_count" },
-  { title: "已解决", key: "accepted_count" },
-  { title: "正确率", key: "correct_rate" },
+  { title: "提交数", key: "submissionCount" },
+  { title: "已解决", key: "acceptedCount" },
+  // 新后端返回的是数值，百分号在这里补 —— 旧后端直接返回 "85.5%" 字符串
+  {
+    title: "正确率",
+    key: "correctRate",
+    render: (row) => `${row.correctRate}%`,
+  },
 ]

 const query = reactive({
@@ -230,24 +235,8 @@ const person = reactive({
 const route = useRoute()
 const router = useRouter()

-interface UserStatistic {
-  username: string
-  submission_count: number
-  accepted_count: number
-  correct_rate: string
-  submission_items: Array<{
-    id: string
-    result: SUBMISSION_RESULT
-  }>
-}
-
-interface UnacceptedItem {
-  username: string
-  real_name: string
-}
-
-const list = ref<UserStatistic[]>([])
-const listUnaccepted = ref<UnacceptedItem[]>([])
+const list = ref<SubmissionStatisticsUser[]>([])
+const listUnaccepted = ref<UnacceptedStudent[]>([])
 const expandedRowKeys = ref<DataTableRowKey[]>([])

 const HIDE_DURATION = 2 * 60 * 60 * 1000
@@ -432,16 +421,16 @@ async function handleStatistics() {
    query.problem,
    query.username,
  )
-  count.total = res.data.submission_count
-  count.accepted = res.data.accepted_count
-  count.rate = res.data.correct_rate
+  count.total = res.data.submissionCount
+  count.accepted = res.data.acceptedCount
+  count.rate = res.data.correctRate
  list.value = res.data.data
-  listUnaccepted.value = res.data.data_unaccepted
-  person.count = res.data.person_count
-  person.rate = res.data.person_rate
+  listUnaccepted.value = res.data.dataUnaccepted
+  person.count = res.data.personCount
+  person.rate = res.data.personRate
 }

-function rowKey(row: UserStatistic): DataTableRowKey {
+function rowKey(row: SubmissionStatisticsUser): DataTableRowKey {
  return row.username
 }

@@ -449,7 +438,7 @@ function updateExpandedRowKeys(keys: DataTableRowKey[]) {
  expandedRowKeys.value = keys.slice(-1)
 }

-function rowProps(row: UserStatistic) {
+function rowProps(row: SubmissionStatisticsUser) {
  return {
    style: "cursor: pointer;",
    onClick: () => {
--- a/bun.lock
+++ b/bun.lock
@@ -13,6 +13,7 @@
      "name": "@oj2/api",
      "version": "0.0.0",
      "dependencies": {
+        "@node-rs/jieba": "^2.0.1",
        "@oj2/contract": "workspace:*",
        "bullmq": "^6.0.9",
        "drizzle-orm": "^0.45.2",
@@ -349,6 +350,12 @@

    "@drizzle-team/brocli": ["@drizzle-team/brocli@0.10.2", "https://registry.npmjs.com/@drizzle-team/brocli/-/brocli-0.10.2.tgz", {}, "sha512-z33Il7l5dKjUgGULTqBsQBQwckHh5AbIuxhdsIxDDiZAzBOrZO6q9ogcWC65kU382AfynTfgNumVcNIjuIua6w=="],

+    "@emnapi/core": ["@emnapi/core@1.11.3", "", { "dependencies": { "@emnapi/wasi-threads": "1.2.3", "tslib": "^2.4.0" } }, "sha512-zLpS5asjEb7lq8jYLq37N6XKaE41DIexlY1rF/z4/tIl3wo13Sqm28fRyfIsKZD+NZ8mM5RoKkpW/rBcuoSZSg=="],
+
+    "@emnapi/runtime": ["@emnapi/runtime@1.11.3", "", { "dependencies": { "tslib": "^2.4.0" } }, "sha512-Xz4Tpyki7XyrpbUK1jR1AhdAdaXyhhY4lZ3neLodmhpuWfy2PAQN5B46sAiU4liOXGLkHypn/qU+jvfWSCYYLA=="],
+
+    "@emnapi/wasi-threads": ["@emnapi/wasi-threads@1.2.3", "", { "dependencies": { "tslib": "^2.4.0" } }, "sha512-ELEBe8PsLvvJ6QMr0zLt8ffvOHW/dc1m3CEzNMg7aJUv3bMaoDtw2TXyDAwkYBuroxxuHEwhRTLJSe5sya547g=="],
+
    "@emotion/hash": ["@emotion/hash@0.8.0", "https://registry.npmjs.com/@emotion/hash/-/hash-0.8.0.tgz", {}, "sha512-kBJtf7PH6aWwZ6fka3zQ0p6SBYzx4fl1LoZXE2RrnYST9Xljm7WfKJrU4g/Xr3Beg72MLrp1AWNUmuYJTL7Cow=="],

    "@esbuild-kit/core-utils": ["@esbuild-kit/core-utils@3.3.2", "https://registry.npmjs.com/@esbuild-kit/core-utils/-/core-utils-3.3.2.tgz", { "dependencies": { "esbuild": "~0.18.20", "source-map-support": "^0.5.21" } }, "sha512-sPRAnw9CdSsRmEtnsl2WXWdyquogVpB3yZ3dgwJfe8zrOzTsV7cJvmwrKVa+0ma5BoiGJ+BoqkMvawbayKUsqQ=="],
@@ -413,7 +420,7 @@

    "@iconify/vue": ["@iconify/vue@5.0.1", "https://registry.npmjs.com/@iconify/vue/-/vue-5.0.1.tgz", { "dependencies": { "@iconify/types": "^2.0.0" }, "peerDependencies": { "vue": ">=3.0.0" } }, "sha512-aumwwooJlFJ5H5qYWB6ZTAyM0C8hpfcSVLB9/a3qnH1GGvIJ+FEbpEs4s/HfErYe/M5qZeLjwmESR5fFm3lXEw=="],

-    "@ioredis/commands": ["@ioredis/commands@2.0.0", "", {}, "sha512-vrx0AE/T0h7cRZwfo1M39Cr+ZhZrkf0V8mQN75wucKCxCLD9l/VX6no3gFvrLqD1IlG/1LtzWovqEw3t0Vr9zg=="],
+    "@ioredis/commands": ["@ioredis/commands@2.0.0", "https://registry.npmjs.com/@ioredis/commands/-/commands-2.0.0.tgz", {}, "sha512-vrx0AE/T0h7cRZwfo1M39Cr+ZhZrkf0V8mQN75wucKCxCLD9l/VX6no3gFvrLqD1IlG/1LtzWovqEw3t0Vr9zg=="],

    "@jridgewell/gen-mapping": ["@jridgewell/gen-mapping@0.3.13", "https://registry.npmjs.com/@jridgewell/gen-mapping/-/gen-mapping-0.3.13.tgz", { "dependencies": { "@jridgewell/sourcemap-codec": "^1.5.0", "@jridgewell/trace-mapping": "^0.3.24" } }, "sha512-2kkt/7niJ6MgEPxF0bYdQ6etZaA+fQvDcLKckhy1yIQOzaoKjBBjSj63/aLVjYE3qhRt5dvM+uUyfCg6UKCBbA=="],

@@ -471,17 +478,49 @@

    "@mermaid-js/parser": ["@mermaid-js/parser@1.2.0", "https://registry.npmjs.com/@mermaid-js/parser/-/parser-1.2.0.tgz", { "dependencies": { "@chevrotain/types": "~11.1.2" } }, "sha512-oYPyv8A4As1yH5Bx+04iQEQxXuIQDe0GKCNSRgao6z8AM9jixXIfP0vsppRLvGf+nKIOb9/LdpWA4YuJiVvESA=="],

-    "@msgpackr-extract/msgpackr-extract-darwin-arm64": ["@msgpackr-extract/msgpackr-extract-darwin-arm64@3.0.4", "", { "os": "darwin", "cpu": "arm64" }, "sha512-LCkGo6JDfaBhgST7UpPWgNgLINpcpabaHfyz5OBx75nUYxBsaEPxjnyNjWpeb/xBup/682QnBfRBy2/LvPutZQ=="],
+    "@msgpackr-extract/msgpackr-extract-darwin-arm64": ["@msgpackr-extract/msgpackr-extract-darwin-arm64@3.0.4", "https://registry.npmjs.com/@msgpackr-extract/msgpackr-extract-darwin-arm64/-/msgpackr-extract-darwin-arm64-3.0.4.tgz", { "os": "darwin", "cpu": "arm64" }, "sha512-LCkGo6JDfaBhgST7UpPWgNgLINpcpabaHfyz5OBx75nUYxBsaEPxjnyNjWpeb/xBup/682QnBfRBy2/LvPutZQ=="],

-    "@msgpackr-extract/msgpackr-extract-darwin-x64": ["@msgpackr-extract/msgpackr-extract-darwin-x64@3.0.4", "", { "os": "darwin", "cpu": "x64" }, "sha512-zExlW9zUJKZH/tOtVMttwjKa4Xm/3KcNjnE3dPN92uCktwavMxpgCA3MoJK/DOnTWsQgo224OaST27/mPNAf+w=="],
+    "@msgpackr-extract/msgpackr-extract-darwin-x64": ["@msgpackr-extract/msgpackr-extract-darwin-x64@3.0.4", "https://registry.npmjs.com/@msgpackr-extract/msgpackr-extract-darwin-x64/-/msgpackr-extract-darwin-x64-3.0.4.tgz", { "os": "darwin", "cpu": "x64" }, "sha512-zExlW9zUJKZH/tOtVMttwjKa4Xm/3KcNjnE3dPN92uCktwavMxpgCA3MoJK/DOnTWsQgo224OaST27/mPNAf+w=="],

-    "@msgpackr-extract/msgpackr-extract-linux-arm": ["@msgpackr-extract/msgpackr-extract-linux-arm@3.0.4", "", { "os": "linux", "cpu": "arm" }, "sha512-Tg3yX65f5GbtXLkrYEHE5oibZG9epyYWas7FogTTEJeDEF9JlXJzKgXaNhT3UXlTOeA+AfZpYZYZ0uPj7Cfquw=="],
+    "@msgpackr-extract/msgpackr-extract-linux-arm": ["@msgpackr-extract/msgpackr-extract-linux-arm@3.0.4", "https://registry.npmjs.com/@msgpackr-extract/msgpackr-extract-linux-arm/-/msgpackr-extract-linux-arm-3.0.4.tgz", { "os": "linux", "cpu": "arm" }, "sha512-Tg3yX65f5GbtXLkrYEHE5oibZG9epyYWas7FogTTEJeDEF9JlXJzKgXaNhT3UXlTOeA+AfZpYZYZ0uPj7Cfquw=="],

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+    "@msgpackr-extract/msgpackr-extract-linux-arm64": ["@msgpackr-extract/msgpackr-extract-linux-arm64@3.0.4", "https://registry.npmjs.com/@msgpackr-extract/msgpackr-extract-linux-arm64/-/msgpackr-extract-linux-arm64-3.0.4.tgz", { "os": "linux", "cpu": "arm64" }, "sha512-dgX0P/9wGPJeHFBG+ZmhgE6bmtMt7NP5CRBGyyktpopdk/mW4POnrpQsSLtKI1dwpc+pPLuXHDh6vvskyQE/sw=="],

-    "@msgpackr-extract/msgpackr-extract-linux-x64": ["@msgpackr-extract/msgpackr-extract-linux-x64@3.0.4", "", { "os": "linux", "cpu": "x64" }, "sha512-8TNXMEjJc3QEy7R/x1INhgiU+XakDAFUzBhaz7+Rbrs8NH5UQeHQxxmzsSBJGyV6I1jW79undiQm8tOI+D+8FQ=="],
+    "@msgpackr-extract/msgpackr-extract-linux-x64": ["@msgpackr-extract/msgpackr-extract-linux-x64@3.0.4", "https://registry.npmjs.com/@msgpackr-extract/msgpackr-extract-linux-x64/-/msgpackr-extract-linux-x64-3.0.4.tgz", { "os": "linux", "cpu": "x64" }, "sha512-8TNXMEjJc3QEy7R/x1INhgiU+XakDAFUzBhaz7+Rbrs8NH5UQeHQxxmzsSBJGyV6I1jW79undiQm8tOI+D+8FQ=="],

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-    "standard-as-callback": ["standard-as-callback@2.1.0", "", {}, "sha512-qoRRSyROncaz1z0mvYqIE4lCd9p2R90i6GxW3uZv5ucSu8tU7B5HXUP1gG8pVZsYNVaXjk8ClXHPttLyxAL48A=="],
+    "standard-as-callback": ["standard-as-callback@2.1.0", "https://registry.npmjs.com/standard-as-callback/-/standard-as-callback-2.1.0.tgz", {}, "sha512-qoRRSyROncaz1z0mvYqIE4lCd9p2R90i6GxW3uZv5ucSu8tU7B5HXUP1gG8pVZsYNVaXjk8ClXHPttLyxAL48A=="],

    "string_decoder": ["string_decoder@1.3.0", "https://registry.npmjs.com/string_decoder/-/string_decoder-1.3.0.tgz", { "dependencies": { "safe-buffer": "~5.2.0" } }, "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA=="],

@@ -1301,15 +1342,15 @@

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-    "tree-sitter-c": ["tree-sitter-c@0.24.1", "", { "dependencies": { "node-addon-api": "^8.3.1", "node-gyp-build": "^4.8.4" }, "peerDependencies": { "tree-sitter": "^0.22.4" }, "optionalPeers": ["tree-sitter"] }, "sha512-lkYwWN3SRecpvaeqmFKkuPNR3ZbtnvHU+4XAEEkJdrp3JfSp2pBrhXOtvfsENUneye76g889Y0ddF2DM0gEDpA=="],
+    "tree-sitter-c": ["tree-sitter-c@0.24.1", "https://registry.npmjs.com/tree-sitter-c/-/tree-sitter-c-0.24.1.tgz", { "dependencies": { "node-addon-api": "^8.3.1", "node-gyp-build": "^4.8.4" }, "peerDependencies": { "tree-sitter": "^0.22.4" }, "optionalPeers": ["tree-sitter"] }, "sha512-lkYwWN3SRecpvaeqmFKkuPNR3ZbtnvHU+4XAEEkJdrp3JfSp2pBrhXOtvfsENUneye76g889Y0ddF2DM0gEDpA=="],

-    "tree-sitter-python": ["tree-sitter-python@0.25.0", "", { "dependencies": { "node-addon-api": "^8.5.0", "node-gyp-build": "^4.8.4" }, "peerDependencies": { "tree-sitter": "^0.25.0" }, "optionalPeers": ["tree-sitter"] }, "sha512-eCmJx6zQa35GxaCtQD+wXHOhYqBxEL+bp71W/s3fcDMu06MrtzkVXR437dRrCrbrDbyLuUDJpAgycs7ncngLXw=="],
+    "tree-sitter-python": ["tree-sitter-python@0.25.0", "https://registry.npmjs.com/tree-sitter-python/-/tree-sitter-python-0.25.0.tgz", { "dependencies": { "node-addon-api": "^8.5.0", "node-gyp-build": "^4.8.4" }, "peerDependencies": { "tree-sitter": "^0.25.0" }, "optionalPeers": ["tree-sitter"] }, "sha512-eCmJx6zQa35GxaCtQD+wXHOhYqBxEL+bp71W/s3fcDMu06MrtzkVXR437dRrCrbrDbyLuUDJpAgycs7ncngLXw=="],

    "treemate": ["treemate@0.3.11", "https://registry.npmjs.com/treemate/-/treemate-0.3.11.tgz", {}, "sha512-M8RGFoKtZ8dF+iwJfAJTOH/SM4KluKOKRJpjCMhI8bG3qB74zrFoArKZ62ll0Fr3mqkMJiQOmWYkdYgDeITYQg=="],

    "ts-dedent": ["ts-dedent@2.3.0", "https://registry.npmjs.com/ts-dedent/-/ts-dedent-2.3.0.tgz", {}, "sha512-JfJeIHke7y2egdGGgRAvpCwYFUsHlM2gPcrVOxFkznt/4uzQ7HFmvE63iFHVLBJNDuyDOQgijDK/tXH/f6Msjg=="],

-    "tslib": ["tslib@2.8.1", "", {}, "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w=="],
+    "tslib": ["tslib@2.8.1", "https://registry.npmjs.com/tslib/-/tslib-2.8.1.tgz", {}, "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w=="],

    "tsx": ["tsx@4.23.9", "https://registry.npmjs.com/tsx/-/tsx-4.23.9.tgz", { "dependencies": { "esbuild": "~0.28.0" }, "optionalDependencies": { "fsevents": "~2.3.3" }, "bin": { "tsx": "dist/cli.mjs" } }, "sha512-6q8uTORRGauQVjqMQnKUucLFoeXZAfw6zKvG35GLbdKWbLdeOtZ3H4mhyA5mxuUd2o2cRTskhj59nLLQseUvUw=="],

@@ -1367,7 +1408,7 @@

    "w3c-keyname": ["w3c-keyname@2.2.8", "https://registry.npmjs.com/w3c-keyname/-/w3c-keyname-2.2.8.tgz", {}, "sha512-dpojBhNsCNN7T82Tm7k26A6G9ML3NkhDsnw9n/eoxSRlVBB4CEtIQ/KTCLI2Fwf3ataSXRhYFkQi3SlnFwPvPQ=="],

-    "web-tree-sitter": ["web-tree-sitter@0.26.11", "", {}, "sha512-Q5Dm3YTIXSXuH6FxX6RuzX2Qwpc4DPGiYMU87Wg5Z8OIStiQFiUex4zMDc0vBTw78EphaYJacncJghCHzbZptg=="],
+    "web-tree-sitter": ["web-tree-sitter@0.26.11", "https://registry.npmjs.com/web-tree-sitter/-/web-tree-sitter-0.26.11.tgz", {}, "sha512-Q5Dm3YTIXSXuH6FxX6RuzX2Qwpc4DPGiYMU87Wg5Z8OIStiQFiUex4zMDc0vBTw78EphaYJacncJghCHzbZptg=="],

    "web-worker": ["web-worker@1.5.0", "https://registry.npmjs.com/web-worker/-/web-worker-1.5.0.tgz", {}, "sha512-RiMReJrTAiA+mBjGONMnjVDP2u3p9R1vkcGz6gDIrOMT3oGuYwX2WRMYI9ipkphSuE5XKEhydbhNEJh4NY9mlw=="],

--- a/packages/contract/src/flowchart.ts
+++ b/packages/contract/src/flowchart.ts
@@ -53,6 +53,25 @@ export const createFlowchartResponseSchema = z.object({ submissionId: z.string()
 export const flowchartCurrentSchema = z.object({ count: z.number().int(), score: z.number(), grade: z.string() })
 export const flowchartDetailSchema = z.object({ submission: flowchartSubmissionSchema.nullable(), count: z.number().int() })

+export const flowchartStatisticsSchema = z.object({
+  totalCount: z.number().int(),
+  avgScore: z.number(),
+  gradeDistribution: z.record(z.string(), z.number().int()),
+  criteriaAverages: z.record(
+    z.string(),
+    z.object({ avg: z.number(), max: z.number() }),
+  ),
+  personCount: z.number().int(),
+  completedCount: z.number().int(),
+  wordFrequencies: z.array(
+    z.object({ word: z.string(), count: z.number().int() }),
+  ),
+  // 与提交统计共用「未完成学生」的形状，见 submission.ts 的 unacceptedStudentSchema
+  dataUnaccepted: z.array(
+    z.object({ username: z.string(), realName: z.string() }),
+  ),
+})
+
 export const flowchartUpdateSchema = z.object({
  type: z.enum([
    "flowchart_evaluation_completed",
@@ -69,3 +88,4 @@ export const flowchartUpdateSchema = z.object({
 })

 export type FlowchartUpdate = z.infer<typeof flowchartUpdateSchema>
+export type FlowchartStatistics = z.infer<typeof flowchartStatisticsSchema>
--- a/packages/contract/src/submission.ts
+++ b/packages/contract/src/submission.ts
@@ -75,6 +75,38 @@ export const submissionListSchema = paginatedSchema(submissionListItemSchema)

 export const shareSubmissionRequestSchema = z.object({ shared: z.boolean() })

+/**
+ * 未完成学生。`realName` 是从用户名里剥掉 `ks<班级号>` 前缀后剩下的那一段，
+ * 不是 user.real_name 列 —— 与 F2「真名默认不下发」不冲突：这里只有教师能看到，
+ * 且教师面板的用途正是点名谁没做。
+ */
+export const unacceptedStudentSchema = z.object({
+  username: z.string(),
+  realName: z.string(),
+})
+
+export const submissionStatisticsUserSchema = z.object({
+  username: z.string(),
+  className: z.string().nullable(),
+  submissionCount: z.number().int(),
+  acceptedCount: z.number().int(),
+  // 百分比数值，不带 %。旧后端返回 "85.5%" 字符串，展示格式化交给前端。
+  correctRate: z.number(),
+  submissionItems: z.array(
+    z.object({ id: z.string(), result: judgeStatusSchema }),
+  ),
+})
+
+export const submissionStatisticsSchema = z.object({
+  submissionCount: z.number().int(),
+  acceptedCount: z.number().int(),
+  correctRate: z.number(),
+  personCount: z.number().int(),
+  personRate: z.number(),
+  data: z.array(submissionStatisticsUserSchema),
+  dataUnaccepted: z.array(unacceptedStudentSchema),
+})
+
 export const formatCodeRequestSchema = z.object({
  code: z.string().max(1024 * 1024),
  language: z.enum(["python", "c", "cpp", "sql"]),
@@ -88,3 +120,8 @@ export type CreateSubmissionRequest = z.infer<
 >
 export type SubmissionDetail = z.infer<typeof submissionDetailSchema>
 export type SubmissionUpdate = z.infer<typeof submissionUpdateSchema>
+export type SubmissionStatistics = z.infer<typeof submissionStatisticsSchema>
+export type SubmissionStatisticsUser = z.infer<
+  typeof submissionStatisticsUserSchema
+>
+export type UnacceptedStudent = z.infer<typeof unacceptedStudentSchema>