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/api/src/routes/achievement.ts

@@ -11,7 +11,7 @@ import { Hono } from "hono"
 import { requireAuth, type AppEnv } from "../auth/middleware"
 import { db, schema } from "../db"
 import { failure, parseBody, success } from "../http"
-import { objectValue } from "./helpers"
+import { asRecord } from "./helpers"
 
 export const achievementRoutes = new Hono<AppEnv>()
 
@@ -73,7 +73,7 @@ achievementRoutes.get("/achievements", requireAuth, async (c) => {
       .where(eq(schema.user.isDisabled, false)),
   ])
   const unlocked = new Map(unlockedRows.map((row) => [row.achievementId, row]))
-  const metrics = objectValue(statRows[0]?.metrics)
+  const metrics = asRecord(statRows[0]?.metrics)
   const active = activeRows[0]?.value ?? 0
   const result = achievements.map((achievement) => {
     const record = unlocked.get(achievement.id)