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/oj/transforms.ts

@@ -1,17 +1,17 @@
 import { DIFFICULTY } from "utils/constants"
 import { getACRate } from "utils/functions"
-import type { ProblemFiltered, ProblemListItem } from "utils/types"
+import type { ProblemRow, ProblemListItem } from "utils/types"
 
 // 把后端的列表项塑形成列表页需要的形状，与请求逻辑解耦。
-export function filterResult(result: ProblemListItem): ProblemFiltered {
+export function toProblemRow(result: ProblemListItem): ProblemRow {
   return {
     id: result.id,
     _id: result._id,
     title: result.title,
     difficulty: result.difficulty ? DIFFICULTY[result.difficulty] : null,
     tags: result.tags,
-    submission: result.submissionNumber,
-    rate: getACRate(result.acceptedNumber, result.submissionNumber),
+    submissionCount: result.submissionNumber,
+    acRate: getACRate(result.acceptedNumber, result.submissionNumber),
     // null / undefined 都表示「没做过」
     status:
       result.myStatus === null || result.myStatus === undefined