refactor: 一批名不副实的命名改掉（只动一端，不碰契约）

后端：
- getUserByToken → authenticateToken：它会删会话、续 TTL、记在线，不是纯读
- todayStart → dayStart(instant)：本来就接受任意时刻，不只是「今天」
- objectValue → asRecord，删掉 4 份一模一样的私有拷贝和 `as toObject` 别名
- 报错文案 "does not exists" / "Already be a public problem" 改通顺

前端：
- utils/types 里 Contest / User / Problem 三个别名删掉：Contest 原来指后台
  比赛、契约里同名的却是学生侧。现在 Contest = 学生侧、AdminContest = 后台，
  后台用户表单叫 AdminUserForm，题目详情直接用 ProblemDetail
- SubmissionInfo → ContestSubmissionInfo，免得和 submission.info 撞名
- utoa / atou → compressToBase64 / decompressFromBase64（实际是 zlib + base64），
  encode / decode → base64EncodeUtf8 / base64DecodeUtf8
- filterResult → toProblemRow、toProblemListItem → toAdminProblemRow，
  行字段 submission / rate → submissionCount / acRate
- 组件：Modal → AddFromLibraryModal、Form → EditorToolbar、
  ContestEditor → BasicEditor（题单也在用它）、rank 的 Index → RankMedal、
  Name → UserNameCell、Password → PasswordCell、ContestType → ContestAccessTag

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

apps/web/src/utils/functions.ts

@@ -1,7 +1,7 @@
 import { TIME_ZONE_OFFSET_MINUTES, toAdminType } from "@oj2/contract"
 import type { JudgeCaseResult, JudgeInfo } from "@oj2/contract"
 import { getTime, intervalToDuration, parseISO, type Duration } from "date-fns"
-import { Submission, User } from "./types"
+import { AdminUser, Submission } from "./types"
 import { JUDGE_STATUS, USER_TYPE } from "./constants"
 import {
   strFromU8,
@@ -283,7 +283,7 @@ export function debounce<T extends (...args: any[]) => any>(
   }
 }
 
-export function getUserRole(role: User["adminType"]): {
+export function getUserRole(role: AdminUser["adminType"]): {
   type: "default" | "info" | "warning" | "error"
   label: "普通" | "生管" | "师管" | "超管"
 } {
@@ -315,7 +315,7 @@ export function unique<T>(arr: T[]): T[] {
   return [...new Set(arr)]
 }
 
-export function encode(string?: string): string {
+export function base64EncodeUtf8(string?: string): string {
   try {
     return btoa(String.fromCharCode(...new TextEncoder().encode(string ?? "")))
   } catch (error) {
@@ -324,7 +324,7 @@ export function encode(string?: string): string {
   }
 }
 
-export function decode(bytes?: string): string {
+export function base64DecodeUtf8(bytes?: string): string {
   try {
     if (!bytes) return ""
     const latin = atob(bytes)
@@ -339,14 +339,14 @@ export function decode(bytes?: string): string {
   }
 }
 
-export function utoa(data: string): string {
+export function compressToBase64(data: string): string {
   const buffer = strToU8(data)
   const zipped = zlibSync(buffer, { level: 9 })
   const binary = strFromU8(zipped, true)
   return btoa(binary)
 }
 
-export function atou(base64: string): string {
+export function decompressFromBase64(base64: string): string {
   const binary = atob(base64)
   const buffer = strToU8(binary, true)
   const unzipped = unzlibSync(buffer)

apps/web/src/utils/judge.ts

@@ -1,5 +1,5 @@
 import axios from "axios"
-import { decode, encode } from "./functions"
+import { base64DecodeUtf8, base64EncodeUtf8 } from "./functions"
 import type { Code, LANGUAGE } from "./types"
 
 const http = axios.create({ baseURL: import.meta.env.PUBLIC_JUDGE0_URL })
@@ -16,7 +16,7 @@ const JUDGE0_LANGUAGE_ID: Partial<Record<LANGUAGE, number>> = {
 }
 
 export async function createTestSubmission(code: Code, input: string) {
-  const encodedCode = encode(code.value)
+  const encodedCode = base64EncodeUtf8(code.value)
   const id = JUDGE0_LANGUAGE_ID[code.language]
   if (id === undefined) {
     return { status: null, output: `${code.language} 不支持在线试运行` }
@@ -26,7 +26,7 @@ export async function createTestSubmission(code: Code, input: string) {
   const payload = {
     source_code: encodedCode,
     language_id: id,
-    stdin: encode(input),
+    stdin: base64EncodeUtf8(input),
     redirect_stderr_to_stdout: true,
     compiler_options: compilerOptions,
   }
@@ -36,7 +36,10 @@ export async function createTestSubmission(code: Code, input: string) {
   const data = response.data
   return {
     status: data.status && data.status.id,
-    output: [decode(data.compile_output), decode(data.stdout)]
+    output: [
+      base64DecodeUtf8(data.compile_output),
+      base64DecodeUtf8(data.stdout),
+    ]
       .join("\n")
       .trim(),
   }

apps/web/src/utils/types.ts

@@ -10,7 +10,6 @@ import type {
   EmbeddedSubmission as ContractEmbeddedSubmission,
   Message as ContractMessage,
   Grade,
-  ProblemDetail,
   ProblemDifficulty,
   JudgeStatus,
   AstRules,
@@ -41,7 +40,7 @@ export interface AcmProblemsStatus {
  * 后台用户管理里的用户。`rawPassword` 是明文密码，只有超管专属接口下发 ——
  * 老师要能查学生密码，见契约 adminUserSchema 的注释。
  */
-export type User = AdminUser & {
+export type AdminUserForm = AdminUser & {
   // 编辑表单里临时填的新密码，不在响应里
   password?: string
 }
@@ -111,20 +110,6 @@ export type { UploadTestCaseResponse } from "@oj2/contract"
  */
 export type { ProblemTestCaseScore as Testcase } from "@oj2/contract"
 
-/**
- * 题目详情。**直接取契约** —— `languages` / `template` 的收窄已经搬进
- * `problemDetailSchema`（`z.array(problemLanguageSchema)` 与
- * `z.partialRecord(problemLanguageSchema, …)`），这里原来那份
- * `Omit<ProblemDetail, "languages" | "template"> & {...}` 与契约**双向可赋值**，
- * 即完全等价，是一层没有内容的重复（已用类型探针验证）。
- *
- * 原来它还多挂三个可选字段（`hasAstRules` / `visible` / `answers`）。它们在
- * 契约里**本来就有**（`hasAstRules` 在题目列表项上、`ProblemDetail` 带的是
- * `astRequirements`），少数管理端调用点需要补充时应该就地声明自己的类型，
- * 不该让一个全局别名对所有调用方声称这些字段存在。
- */
-export type Problem = ProblemDetail
-
 /**
  * AST 代码要求。原来这里手抄的那份少了 label / exact / outer / inner ——
  * 编辑器写得出 label 和 exact，判题机也认，只有这个类型不认。形状在契约里。
@@ -174,15 +159,15 @@ export type BlankProblem = Omit<
   mermaidCode: string
 }
 
-export interface ProblemFiltered {
+export interface ProblemRow {
   _id: string
   id: number
   title: string
   // 比赛进行中难度不下发，见 contract 的 maskedProblemDifficultySchema
   difficulty: "简单" | "中等" | "困难" | null
   tags: string[]
-  submission: number
-  rate: string
+  submissionCount: number
+  acRate: string
   status: "not_test" | "passed" | "failed"
   author: string
   allowFlowchart: boolean
@@ -190,7 +175,7 @@ export interface ProblemFiltered {
   hasAstRules: boolean
 }
 
-export interface AdminProblemFiltered {
+export interface AdminProblemRow {
   _id: string
   id: number
   title: string
@@ -314,11 +299,11 @@ export type {
   ClassUserRank,
 } from "@oj2/contract"
 
-/** 后台比赛。oj 侧的 contestSchema 永远不含 password，后台要能看到（告诉学生） */
-export type Contest = AdminContest
-
-/** 学生侧的比赛：不含 password / visible */
-export type { Contest as OjContest } from "@oj2/contract"
+/**
+ * 学生侧的比赛：不含 password / visible。后台用 `AdminContest` ——
+ * oj 侧的 contestSchema 永远不含 password，后台要能看到（告诉学生）
+ */
+export type { Contest, AdminContest } from "@oj2/contract"
 
 export type BlankContest = Omit<
   AdminContest,
@@ -331,10 +316,10 @@ export type BlankContest = Omit<
 >
 
 /**
- * `acm_contest_rank.submission_info` 的 JSONB 内容。**形状已搬进契约**
- * （`contestSubmissionInfoSchema`），这里保留别名给既有调用点。
+ * `acm_contest_rank.submission_info` 的 JSONB 内容，形状在契约
+ * （`contestSubmissionInfoSchema`）。别和 `submission.info`（判题结果）混了。
  */
-export type { ContestSubmissionInfo as SubmissionInfo } from "@oj2/contract"
+export type { ContestSubmissionInfo } from "@oj2/contract"
 
 /**
  * 榜单行。`submissionInfo` 的收窄（JSONB 原文的 snake_case 形状）已经搬进