refactor(契约): 展示题号统一叫 problemDisplayId，题单 id 统一叫 problemSetId

前后端同时改，部署前开着的旧页面要刷新一次（题号列会是空的、提交筛选会失效）。

- 挂在非题目对象上的展示题号，原来叫 problem（字符串）或 displayId，统一成
  problemDisplayId：提交列表、流程图列表、统计的 lastFailure / items /
  今日最热题、站内信里的提交、后台题单的题目列表。别处的 problem 都是对象
  或数字 id，这几处是字符串，最容易看错
- 列表筛选的 query 参数 ?problemId= 实际传的是展示题号，改成
  ?problemDisplayId=（提交列表、流程图列表、三个统计接口）
- 契约里 problemsetId / problemSetId、problemset / problemSet 两种拼法并存，
  统一成 problemSetId / problemSet，和 ProblemSet* 类型名、problem-sets
  路径、前端路由参数一致。drizzle 的列键跟表名走，没动
- aiDetail.user（用户名字符串，而契约里别的 user 都是对象）→ username。
  ai_analysis.data 里存的历史快照仍是 user，没有代码读回它
- 后台题单题目表的列是按字符串键 'displayId' 取的，类型检查抓不到，一并改

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

apps/api/src/routes/admin/problemset.ts

@@ -293,9 +293,9 @@ adminProblemSetRoutes.get(
         ({ item, problem }) =>
           ({
             id: item.id,
-            problemsetId: item.problemsetId,
+            problemSetId: item.problemsetId,
             problemId: item.problemId,
-            displayId: problem.displayId,
+            problemDisplayId: problem.displayId,
             title: problem.title,
             difficulty: problem.difficulty,
             order: item.order,
@@ -456,7 +456,7 @@ async function badgesWithCount(badges: BadgeRow[]) {
     (badge) =>
       ({
         id: badge.id,
-        problemsetId: badge.problemsetId,
+        problemSetId: badge.problemsetId,
         name: badge.name,
         description: badge.description,
         icon: badge.icon,

apps/api/src/routes/content.ts

@@ -169,7 +169,7 @@ contentRoutes.get("/messages", requireAuth, async (c) => {
             language: submission.language,
             statisticInfo: asRecord(submission.statisticInfo),
             // 展示用题号而非数字主键，站内信页面拿它拼 /problem/<题号>
-            problem: displayId,
+            problemDisplayId: displayId,
             showLink: true,
           } satisfies EmbeddedSubmission,
         }) satisfies Message,

apps/api/src/routes/flowchart.ts

@@ -244,7 +244,7 @@ flowchartRoutes.get("/flowcharts", requireAuth, async (c) => {
   const user = c.get("user")!
   const limit = queryInteger(c.req.query("limit"), 10, { min: 1, max: 250 })
   const offset = queryInteger(c.req.query("offset"), 0, { min: 0 })
-  const displayId = c.req.query("problemId")?.trim()
+  const displayId = c.req.query("problemDisplayId")?.trim()
   const username = c.req.query("username")?.trim()
   const grade = c.req.query("grade")
   // 与代码提交列表同一套口径（submission.ts 的 GET /submissions）：关掉
@@ -298,7 +298,7 @@ flowchartRoutes.get("/flowcharts", requireAuth, async (c) => {
         ({
           id: flowchart.id,
           username,
-          problem: problem.displayId,
+          problemDisplayId: problem.displayId,
           problemTitle: problem.title,
           status: flowchart.status,
           createTime: flowchart.createTime,
@@ -349,7 +349,7 @@ flowchartRoutes.get("/flowcharts/statistics", requireTeacher, async (c) => {
   if (start)
     filters.push(sql`${schema.flowchartSubmission.createTime} >= ${start}`)
 
-  const displayId = c.req.query("problemId")?.trim()
+  const displayId = c.req.query("problemDisplayId")?.trim()
   if (displayId) {
     const [problem] = await db
       .select({ id: schema.problem.id })

apps/api/src/routes/problemset.ts

@@ -81,7 +81,7 @@ function badgeData(
 ) {
   return {
     id: badge.id,
-    problemsetId: badge.problemsetId,
+    problemSetId: badge.problemsetId,
     name: badge.name,
     description: badge.description,
     icon: badge.icon,
@@ -306,7 +306,7 @@ problemsetRoutes.get("/problem-sets/:id/problems", optionalAuth, async (c) => {
       ({ link, problemId, displayId, title, difficulty }) =>
         ({
           id: link.id,
-          problemsetId: link.problemsetId,
+          problemSetId: link.problemsetId,
           problem: { id: problemId, _id: displayId, title, difficulty },
           order: link.order,
           isRequired: link.isRequired,
@@ -435,7 +435,7 @@ problemsetRoutes.get("/users/:username/badges", optionalAuth, async (c) => {
           userId: userBadge.userId,
           badge: badgeData(badge),
           earnedTime: userBadge.earnedTime,
-          problemset: { id: problemSet.id, title: problemSet.title },
+          problemSet: { id: problemSet.id, title: problemSet.title },
         }) satisfies UserBadge,
     ),
   )
@@ -572,7 +572,7 @@ problemsetRoutes.get(
       ({ progress, user: progressUser, realName }) =>
         ({
           id: progress.id,
-          problemsetId: progress.problemsetId,
+          problemSetId: progress.problemsetId,
           user: sampleUser(progressUser, realName),
           joinTime: progress.joinTime,
           completeTime: progress.completeTime,

apps/api/src/routes/submission-statistics.ts

@@ -151,7 +151,7 @@ submissionStatisticsRoutes.get(
         count: row.value,
       })),
       problems: problemRows.map((row) => ({
-        problem: row.displayId,
+        problemDisplayId: row.displayId,
         problemTitle: row.title,
         count: row.value,
         acceptedCount: row.accepted,
@@ -240,7 +240,7 @@ async function lastFailureByUser(where: SQL | undefined, userIds: number[]) {
     number,
     {
       id: string
-      problem: string
+      problemDisplayId: string
       result: JudgeStatusValue
       error: string | null
     }
@@ -276,7 +276,7 @@ async function lastFailureByUser(where: SQL | undefined, userIds: number[]) {
   for (const row of rows) {
     byUser.set(row.user_id, {
       id: row.id,
-      problem: row.problem,
+      problemDisplayId: row.problem,
       result: row.result,
       error: row.error,
     })
@@ -412,7 +412,7 @@ async function statisticsScope(c: {
   if (range.start)
     filters.push(sql`${schema.submission.createTime} >= ${range.start}`)
 
-  const displayIds = parseDisplayIds(c.req.query("problemId") ?? "")
+  const displayIds = parseDisplayIds(c.req.query("problemDisplayId") ?? "")
   if (displayIds.length > STATISTICS_MAX_PROBLEMS) {
     return {
       ok: false,
@@ -682,7 +682,7 @@ submissionStatisticsRoutes.get(
         id: schema.submission.id,
         result: schema.submission.result,
         createTime: schema.submission.createTime,
-        problem: schema.problem.displayId,
+        problemDisplayId: schema.problem.displayId,
         problemTitle: schema.problem.title,
       })
       .from(schema.submission)

apps/api/src/routes/submission.ts

@@ -627,7 +627,7 @@ submissionRoutes.get("/submissions", optionalAuth, async (c) => {
   ) {
     return success(c, { results: [], total: 0 } satisfies SubmissionList)
   }
-  const displayId = c.req.query("problemId")?.trim()
+  const displayId = c.req.query("problemDisplayId")?.trim()
   const myself = c.req.query("myself") === "1" ? user : null
   // 「只看自己」盖过用户名
   const username = myself ? undefined : c.req.query("username")?.trim()
@@ -673,7 +673,7 @@ submissionRoutes.get("/submissions", optionalAuth, async (c) => {
       ({ submission, problem }) =>
         ({
           id: submission.id,
-          problem: problem.displayId,
+          problemDisplayId: problem.displayId,
           problemTitle: problem.title,
           showLink: user
             ? canViewSubmission(user, submission, problem, null, joinTimes)
@@ -708,7 +708,7 @@ submissionRoutes.get(
     const limit = queryInteger(c.req.query("limit"), 10, { min: 1, max: 250 })
     const offset = queryInteger(c.req.query("offset"), 0, { min: 0 })
     const user = c.get("user")
-    const displayId = c.req.query("problemId")?.trim()
+    const displayId = c.req.query("problemDisplayId")?.trim()
     const myself = c.req.query("myself") === "1" ? user : null
     const username = myself ? undefined : c.req.query("username")?.trim()
     const result = c.req.query("result")
@@ -757,7 +757,7 @@ submissionRoutes.get(
         ({ submission, problem }) =>
           ({
             id: submission.id,
-            problem: problem.displayId,
+            problemDisplayId: problem.displayId,
             problemTitle: problem.title,
             showLink: user
               ? canViewSubmission(user, submission, problem, contest)

apps/api/src/services/learning-stats.ts

@@ -314,7 +314,7 @@ export async function buildDetail(user: AuthUser, start: string, end: string) {
   const problemIds = firstAc.map((item) => item.problemId)
   if (!problemIds.length)
     return {
-      user: user.username,
+      username: user.username,
       className: user.className,
       start,
       end,
@@ -415,7 +415,7 @@ export async function buildDetail(user: AuthUser, start: string, end: string) {
       b.latestSubmissionTime.localeCompare(a.latestSubmissionTime),
     )
   return {
-    user: user.username,
+    username: user.username,
     className: user.className,
     start,
     end,

apps/web/src/admin/contest/helper.vue

@@ -134,7 +134,7 @@ async function viewSubmission(item: HelperItem) {
     // 查询该用户在该竞赛该题目的 AC 提交
     const res = await getSubmissions({
       username: item.username,
-      problemId: item.problemDisplayId,
+      problemDisplayId: item.problemDisplayId,
       contestId: props.contestID,
       result: "0", // ACCEPTED
       language: "",

apps/web/src/admin/problemset/components/ProblemManagement.vue

@@ -27,7 +27,7 @@ defineEmits<Emits>()
     </n-flex>
     <n-data-table
       :columns="[
-        { title: '题目ID', key: 'displayId', width: 80 },
+        { title: '题目ID', key: 'problemDisplayId', width: 80 },
         { title: '题目标题', key: 'title', minWidth: 200 },
         { title: '顺序', key: 'order', width: 80 },
         {

apps/web/src/oj/achievement/index.vue

@@ -161,15 +161,15 @@ watch(name, load)
                     object-fit="contain"
                   />
                 </template>
-                <n-text v-if="b.problemset" depth="3" class="source">
+                <n-text v-if="b.problemSet" depth="3" class="source">
                   来自题单
                   <router-link
                     :to="{
                       name: 'problemset',
-                      params: { problemSetId: b.problemset.id },
+                      params: { problemSetId: b.problemSet.id },
                     }"
                   >
-                    {{ b.problemset.title }}
+                    {{ b.problemSet.title }}
                   </router-link>
                 </n-text>
               </n-thing>

apps/web/src/oj/api.ts

@@ -174,20 +174,20 @@ export function adminRejudge(id: string) {
 export function getSubmissionStatisticsItems(
   duration: { start?: string; end: string },
   username: string,
-  problemID?: string,
+  problemDisplayId?: string,
 ) {
   return api.get<SubmissionStatisticsItems>("submissions/statistics/items", {
-    params: { ...duration, problemId: problemID, username },
+    params: { ...duration, problemDisplayId, username },
   })
 }
 
 export function getSubmissionStatistics(
   duration: { start?: string; end: string },
-  problemID?: string,
+  problemDisplayId?: string,
   username?: string,
 ) {
   return api.get<SubmissionStatistics>("submissions/statistics", {
-    params: { ...duration, problemId: problemID, username },
+    params: { ...duration, problemDisplayId, username },
   })
 }
 
@@ -410,7 +410,7 @@ export function getFlowchartSubmission(id: string) {
 
 export function getFlowchartSubmissions(params: {
   username?: string
-  problemId?: string
+  problemDisplayId?: string
   myself?: string
   offset?: number
   limit?: number
@@ -422,11 +422,11 @@ export function getFlowchartSubmissions(params: {
 
 export function getFlowchartStatistics(
   duration: { start?: string; end: string },
-  problemID?: string,
+  problemDisplayId?: string,
   username?: string,
 ) {
   return api.get<FlowchartStatistics>("flowcharts/statistics", {
-    params: { ...duration, problemId: problemID, username },
+    params: { ...duration, problemDisplayId, username },
   })
 }
 

apps/web/src/oj/problem/components/ProblemSubmission.vue

@@ -126,7 +126,7 @@ async function listSubmissions() {
     ...query,
     myself: "1",
     offset,
-    problemId: (route.params.problemID as string) ?? "",
+    problemDisplayId: (route.params.problemID as string) ?? "",
     contestId: (route.params.contestID as string) ?? "",
   })
   submissions.value = res.results

apps/web/src/oj/problemset/detail.vue

@@ -49,7 +49,7 @@ async function loadUserBadges() {
 
   const res = await getUserBadges()
   userBadges.value = res.filter(
-    (badge: UserBadgeType) => badge.badge.problemsetId === problemSetId.value,
+    (badge: UserBadgeType) => badge.badge.problemSetId === problemSetId.value,
   )
 }
 

apps/web/src/oj/store/ai.ts

@@ -16,7 +16,7 @@ export const useAIStore = defineStore("ai", () => {
   const rangeEnd = ref("")
   const durationData = ref<DurationData[]>([])
   const detailsData = reactive<DetailsData>({
-    user: "",
+    username: "",
     start: "",
     end: "",
     grade: "",

apps/web/src/oj/submission/components/TodayStatistics.vue

@@ -148,14 +148,18 @@ onMounted(async () => {
       <template v-if="stats.problems.length">
         <n-divider style="margin: 16px 0">今天最热的题</n-divider>
         <div class="rows">
-          <div class="row" v-for="row in stats.problems" :key="row.problem">
+          <div
+            class="row"
+            v-for="row in stats.problems"
+            :key="row.problemDisplayId"
+          >
             <n-button
               class="problem"
               text
               type="info"
-              @click="emit('openProblem', row.problem)"
+              @click="emit('openProblem', row.problemDisplayId)"
             >
-              {{ row.problem }} {{ row.problemTitle }}
+              {{ row.problemDisplayId }} {{ row.problemTitle }}
             </n-button>
             <n-text class="row-count" depth="3">
               {{ row.count }} 条 / 正确 {{ row.acceptedCount }}

apps/web/src/oj/submission/list.vue

@@ -160,7 +160,7 @@ async function listSubmissions() {
     if (query.language === "Flowchart") {
       const res = await getFlowchartSubmissions({
         username: query.username,
-        problemId: query.problem,
+        problemDisplayId: query.problem,
         myself: query.myself,
         offset,
         limit: query.limit,
@@ -173,7 +173,7 @@ async function listSubmissions() {
       const res = await getSubmissions({
         ...query,
         offset,
-        problemId: query.problem,
+        problemDisplayId: query.problem,
         contestId: (route.params.contestID as string) ?? "",
         language: query.language,
         today: query.today,
@@ -239,12 +239,12 @@ function problemClicked(row: SubmissionListItem | FlowchartSubmissionListItem) {
     const path = router.resolve({
       name: "contest problem",
       params: {
-        problemID: row.problem,
+        problemID: row.problemDisplayId,
       },
     })
     window.open(path.href, "_blank")
   } else {
-    window.open("/problem/" + row.problem, "_blank")
+    window.open("/problem/" + row.problemDisplayId, "_blank")
   }
 }
 
@@ -289,7 +289,7 @@ function consumePendingJump() {
     message.info("这一页没有可以查看的代码")
     return
   }
-  showCodePanel(row.id, row.problem)
+  showCodePanel(row.id, row.problemDisplayId)
 }
 
 function moveCodePanel(step: 1 | -1) {
@@ -297,7 +297,7 @@ function moveCodePanel(step: 1 | -1) {
   if (index === -1) return
   const next = viewableSubmissions.value[index + step]
   if (next) {
-    showCodePanel(next.id, next.problem)
+    showCodePanel(next.id, next.problemDisplayId)
     return
   }
   const page = query.page + step
@@ -390,7 +390,7 @@ const columns = computed(() => {
       render: (row) =>
         h(SubmissionLink, {
           submission: row,
-          onShowCode: () => showCodePanel(row.id, row.problem),
+          onShowCode: () => showCodePanel(row.id, row.problemDisplayId),
         }),
     },
     {
@@ -409,9 +409,9 @@ const columns = computed(() => {
           {
             type: "题目",
             onClick: () => problemClicked(row),
-            onSearch: () => (query.problem = row.problem),
+            onSearch: () => (query.problem = row.problemDisplayId),
           },
-          () => `${row.problem} ${row.problemTitle}`,
+          () => `${row.problemDisplayId} ${row.problemTitle}`,
         )
         // 从题单入口做出来的提交才有这个标记（后端只在提交时记来源），
         // 同一道题从普通题库刷的不会带。老提交里只有当年首次 AC 那条有
@@ -507,9 +507,9 @@ const flowchartColumns = computed(() => {
           {
             type: "题目",
             onClick: () => problemClicked(row),
-            onSearch: () => (query.problem = row.problem),
+            onSearch: () => (query.problem = row.problemDisplayId),
           },
-          () => `${row.problem} ${row.problemTitle}`,
+          () => `${row.problemDisplayId} ${row.problemTitle}`,
         ),
     },
     {

apps/web/src/oj/user/message.vue

@@ -17,9 +17,9 @@
           <n-button
             text
             type="info"
-            @click="router.push('/problem/' + item.submission.problem)"
+            @click="router.push('/problem/' + item.submission.problemDisplayId)"
           >
-            {{ item.submission.problem }}
+            {{ item.submission.problemDisplayId }}
           </n-button>
           <n-text :type="JUDGE_STATUS[item.submission.result]['type']">
             {{ JUDGE_STATUS[item.submission.result]["name"] }}

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

@@ -172,7 +172,7 @@
                 </template>
                 <n-flex vertical size="small">
                   <n-text depth="3">
-                    最近一次：{{ item.failure?.problem }} ·
+                    最近一次：{{ item.failure?.problemDisplayId }} ·
                     {{ statusName(item.failure?.result) }}
                   </n-text>
                   <pre v-if="item.failure?.error" class="failure-error">{{
@@ -252,17 +252,17 @@ function groupByProblem(list: SubmissionStatisticsItems["items"]) {
   const groups = new Map<
     string,
     {
-      problem: string
+      problemDisplayId: string
       problemTitle: string
       items: SubmissionStatisticsItems["items"]
     }
   >()
   for (const item of list) {
-    const group = groups.get(item.problem)
+    const group = groups.get(item.problemDisplayId)
     if (group) group.items.push(item)
     else
-      groups.set(item.problem, {
+      groups.set(item.problemDisplayId, {
-        problem: item.problem,
+        problemDisplayId: item.problemDisplayId,
         problemTitle: item.problemTitle,
         items: [item],
       })
@@ -313,7 +313,7 @@ const columns: DataTableColumn<SubmissionStatisticsUser>[] = [
                 h(
                   NTag,
                   { size: "small", bordered: false },
-                  () => group.problem,
+                  () => group.problemDisplayId,
                 ),
                 h(
                   NText,

apps/web/src/utils/types.ts

@@ -275,7 +275,7 @@ export interface SubmissionListPayload {
   result?: string
   username?: string
   contestId?: string
-  problemId?: string
+  problemDisplayId?: string
   language: LANGUAGE | ""
   today?: "1" | "0"
   page: number

packages/contract/src/admin.ts

@@ -421,9 +421,9 @@ export const updateProblemSetStatusRequestSchema = z.object({
 
 export const adminProblemSetProblemSchema = z.object({
   id: z.number().int(),
-  problemsetId: z.number().int(),
+  problemSetId: z.number().int(),
   problemId: z.number().int(),
-  displayId: z.string(),
+  problemDisplayId: z.string(),
   title: z.string(),
   difficulty: z.string(),
   order: z.number().int(),
@@ -450,7 +450,7 @@ export const updateProblemInSetRequestSchema = z.object({
 
 export const adminProblemSetBadgeSchema = z.object({
   id: z.number().int(),
-  problemsetId: z.number().int(),
+  problemSetId: z.number().int(),
   name: z.string(),
   description: z.string(),
   icon: z.string(),

packages/contract/src/ai.ts

@@ -59,7 +59,7 @@ export const activityBucketSchema = z.object({
 })
 
 export const aiDetailSchema = z.object({
-  user: z.string(),
+  username: z.string(),
   className: z.string().nullable(),
   start: z.string(),
   end: z.string(),

packages/contract/src/flowchart.ts

@@ -45,7 +45,7 @@ export const flowchartSubmissionSchema = z.object({
 export const flowchartListItemSchema = z.object({
   id: z.string(),
   username: z.string(),
-  problem: z.string(),
+  problemDisplayId: z.string(),
   problemTitle: z.string(),
   status: flowchartStatusSchema,
   createTime: z.string(),

packages/contract/src/problemset.ts

@@ -13,7 +13,7 @@ export const problemSetUserProgressSummarySchema = z.object({
 
 export const problemSetBadgeSchema = z.object({
   id: z.number().int(),
-  problemsetId: z.number().int(),
+  problemSetId: z.number().int(),
   name: z.string(),
   description: z.string(),
   icon: z.string(),
@@ -58,7 +58,7 @@ export const problemSetProblemItemSchema = z.object({
 
 export const problemSetProblemSchema = z.object({
   id: z.number().int(),
-  problemsetId: z.number().int(),
+  problemSetId: z.number().int(),
   problem: problemSetProblemItemSchema,
   order: z.number().int(),
   isRequired: z.boolean(),
@@ -79,7 +79,7 @@ export const completedProblemSchema = z.object({
 
 export const problemSetProgressSchema = z.object({
   id: z.number().int(),
-  problemsetId: z.number().int(),
+  problemSetId: z.number().int(),
   user: sampleUserSchema,
   joinTime: z.string(),
   completeTime: z.string().nullable(),
@@ -107,7 +107,7 @@ export const userBadgeSchema = z.object({
   userId: z.number().int(),
   badge: problemSetBadgeSchema,
   earnedTime: z.string(),
-  problemset: z.object({ id: z.number().int(), title: z.string() }),
+  problemSet: z.object({ id: z.number().int(), title: z.string() }),
 })
 
 export type ProblemSet = z.infer<typeof problemSetSchema>

packages/contract/src/submission.ts

@@ -191,20 +191,14 @@ export const submissionDetailSchema = z.object({
  * 将来有人「顺手」把空值改成真值就不会变成泄露，因为这里压根没有这些字段。
  */
 export const embeddedSubmissionSchema = submissionDetailSchema
-  // problemDisplayId 也要去掉：下面的 problem 就是它，同一个值留两份，
+  // 留下 problemDisplayId（展示用题号）而不是数字主键：站内信页面拿它拼
-  // 而路由只填了 problem —— 这里漏 omit 的那阵子，凡是收到过站内信的人
+  // `/problem/<题号>` 链接，给数字 id 会拼出打不开的地址。
-  // 打开消息页都是 500（parse 抛在缺失的 problemDisplayId 上，列表为空时才碰巧不炸）。
   .omit({
     info: true,
     contestId: true,
     problemId: true,
-    problemDisplayId: true,
     caseSummary: true,
   })
-  // 旧 SubmissionSafeModelSerializer 里 problem 是
-  // `SlugRelatedField(slug_field="_id")`，即**展示用题号**而非数字主键。
-  // 站内信页面拿它拼 `/problem/<题号>` 链接，给数字 id 会拼出打不开的地址。
-  .extend({ problem: z.string() })
 
 /**
  * 判题进度推送。**只带前端真正要用的东西**：靠 submissionId 认领、靠 result /
@@ -224,7 +218,7 @@ export const submissionUpdateSchema = z.object({
 
 export const submissionListItemSchema = z.object({
   id: z.string(),
-  problem: z.string(),
+  problemDisplayId: z.string(),
   problemTitle: z.string(),
   showLink: z.boolean(),
   createTime: z.string(),
@@ -277,7 +271,7 @@ export const attemptedStudentSchema = unacceptedStudentSchema.extend({
     .object({
       id: z.string(),
       /** 题目的展示编号，用来告诉老师错在哪道题 */
-      problem: z.string(),
+      problemDisplayId: z.string(),
       result: judgeStatusSchema,
       error: z.string().nullable(),
     })
@@ -325,7 +319,7 @@ export const submissionStatisticsItemsSchema = z.object({
    * 展开某个学生时列出他这段时间的提交。**带上题目**：一节课里学生往往在好几道题
    * 之间来回跳，一串只有编号的按钮看不出他卡在哪一道 —— 前端按题目分组展示。
    *
-   * 字段名沿用 submissionListItemSchema 的口径：`problem` 是展示用题号（problem._id），
+   * 字段名沿用 submissionListItemSchema 的口径：`problemDisplayId` 是展示用题号（problem._id），
    * `problemTitle` 是标题。
    */
   items: z.array(
@@ -333,7 +327,7 @@ export const submissionStatisticsItemsSchema = z.object({
       id: z.string(),
       result: judgeStatusSchema,
       createTime: z.string(),
-      problem: z.string(),
+      problemDisplayId: z.string(),
       problemTitle: z.string(),
     }),
   ),
@@ -405,7 +399,7 @@ export const todaySubmissionStatisticsSchema = z.object({
    */
   problems: z.array(
     z.object({
-      problem: z.string(),
+      problemDisplayId: z.string(),
       problemTitle: z.string(),
       count: z.number().int(),
       acceptedCount: z.number().int(),