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/admin/problem/components/AddFromLibraryModal.vue

@@ -1,7 +1,7 @@
 <script lang="ts" setup>
 import { getProblemList } from "admin/api"
 import Pagination from "shared/components/Pagination.vue"
-import type { AdminProblemFiltered } from "utils/types"
+import type { AdminProblemRow } from "utils/types"
 import AddButton from "./AddButton.vue"
 
 interface Props {
@@ -23,9 +23,9 @@ const query = reactive({
   keyword: "",
 })
 const total = ref(0)
-const problems = shallowRef<AdminProblemFiltered[]>([])
+const problems = shallowRef<AdminProblemRow[]>([])
 
-const columns: DataTableColumn<AdminProblemFiltered>[] = [
+const columns: DataTableColumn<AdminProblemRow>[] = [
   { title: "编号", key: "_id", width: 80 },
   { title: "标题", key: "title" },
   {

apps/web/src/admin/problem/components/TagProblemsModal.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { NButton, NTag } from "naive-ui"
 import Pagination from "shared/components/Pagination.vue"
-import type { AdminProblemFiltered } from "utils/types"
+import type { AdminProblemRow } from "utils/types"
 import { batchTagProblems, getProblemList } from "admin/api"
 
 interface Props {
@@ -19,13 +19,13 @@ const emit = defineEmits<{
 const router = useRouter()
 const message = useMessage()
 
-const problems = ref<AdminProblemFiltered[]>([])
+const problems = ref<AdminProblemRow[]>([])
 const total = ref(0)
 const page = ref(1)
 const limit = ref(10)
 const keyword = ref("")
 
-const columns: DataTableColumn<AdminProblemFiltered>[] = [
+const columns: DataTableColumn<AdminProblemRow>[] = [
   { title: "显示编号", key: "_id", width: 100 },
   {
     title: "标题",
@@ -81,12 +81,12 @@ function close() {
   emit("update:show", false)
 }
 
-function goEdit(row: AdminProblemFiltered) {
+function goEdit(row: AdminProblemRow) {
   close()
   router.push({ name: "admin problem edit", params: { problemID: row.id } })
 }
 
-async function removeTag(row: AdminProblemFiltered) {
+async function removeTag(row: AdminProblemRow) {
   await batchTagProblems([row.id], [props.tagName], "remove")
   message.success(`已移除「${row.title}」的标签`)
   emit("changed")