refactor(前端): 全站共用的班级下拉、胶囊配色挪出提交列表目录，编辑器不再偷读题目页的 store

- classLabel / groupClassOptions / classSelectOptions 挪到 utils/classes.ts，useTone 挪到
  shared/composables/tone.ts：原来放在 oj/submission/ 下，被前台、后台、shared 引了 50 多处
- 流程图编辑器的草稿键改由题目页传进来（键名不变，学生存着的草稿照样读得到）。原来编辑器
  自己读题目页的 store 和路由拼，后台出题页也用这个组件，那边 store 是空的
- SQL 表名补全改由题目页传表进来。原来补全直接读题目页的 store，自学页的 SQL 代码块会
  补出上一道看过的题的表名

实跑：提交列表、题目页、排名、后台题目页、SQL 题、流程图题打开无报错；SQL 题输入 stu
补出 students；流程图加一步，草稿照旧存在 flowchart-v2-problem-<题号>。

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

apps/web/src/admin/ai/list.vue

@@ -2,7 +2,7 @@
 import { Icon } from "@iconify/vue"
 import PageHeader from "admin/components/PageHeader.vue"
 import { useThemeVars } from "naive-ui"
-import { classLabel } from "oj/submission/utils"
+import { classLabel } from "utils/classes"
 import { useBackClose } from "shared/composables/backClose"
 import { useBreakpoints } from "shared/composables/breakpoints"
 import Pagination from "shared/components/Pagination.vue"

apps/web/src/admin/learn/index.vue

@@ -6,7 +6,7 @@ import { getLearnBoard, getLearnExercises } from "admin/api"
 import { parseTime, readableDuration } from "utils/functions"
 import { useConfigStore } from "shared/store/config"
 import UserName from "shared/components/UserName.vue"
-import { groupClassOptions } from "oj/submission/utils"
+import { groupClassOptions } from "utils/classes"
 import { groupByProject, splitTitle, type TutorialType } from "oj/learn/lesson"
 import "oj/learn/learn.css"
 import ExerciseAttempts from "./ExerciseAttempts.vue"

apps/web/src/admin/problem/Stuck.vue

@@ -7,7 +7,7 @@ import type { StuckProblem, StuckProblemDetail, StuckStudent } from "utils/types
 import { getStuckProblemDetail, getStuckProblems } from "admin/api"
 import { useConfigStore } from "shared/store/config"
 import UserName from "shared/components/UserName.vue"
-import { classLabel, groupClassOptions } from "oj/submission/utils"
+import { classLabel, groupClassOptions } from "utils/classes"
 import { periodRange, type Period } from "oj/statistics/period"
 import { resultName, useResultColor } from "oj/statistics/results"
 import { useBackClose } from "shared/composables/backClose"

apps/web/src/admin/setting/config.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import PageHeader from "admin/components/PageHeader.vue"
 import { useThemeVars } from "naive-ui"
-import { classLabel } from "oj/submission/utils"
+import { classLabel } from "utils/classes"
 import { errorMessage } from "utils/api"
 import { CLASS_NAME_MAX_DIGITS, CLASS_NAME_MIN_DIGITS, CLASS_NAME_RE } from "utils/constants"
 import { copyToClipboard, parseTime } from "utils/functions"

apps/web/src/admin/setting/home.vue

@@ -4,9 +4,9 @@ import { BarElement, CategoryScale, Chart as ChartJS, LinearScale, Tooltip } fro
 import { useThemeVars } from "naive-ui"
 import { Bar } from "vue-chartjs"
 import { useChartTheme } from "shared/composables/chartTheme"
-import { rgba } from "oj/submission/composables/tone"
+import { rgba } from "shared/composables/tone"
 import PageHeader from "admin/components/PageHeader.vue"
-import { classLabel, groupClassOptions } from "oj/submission/utils"
+import { classLabel, groupClassOptions } from "utils/classes"
 import { useConfigStore } from "shared/store/config"
 import { useUserStore } from "shared/store/user"
 import { SubmissionStatus } from "utils/constants"

apps/web/src/admin/user/generate.vue

@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { downloadAccountsCsv } from "./accountsCsv"
 import PageHeader from "admin/components/PageHeader.vue"
-import { classLabel } from "oj/submission/utils"
+import { classLabel } from "utils/classes"
 import UserName from "shared/components/UserName.vue"
 import { errorMessage } from "utils/api"
 import {

apps/web/src/admin/user/list.vue

@@ -15,7 +15,7 @@ import { PROBLEM_PERMISSION, USER_TYPE } from "utils/constants"
 import { useRouteQuery } from "@vueuse/router"
 import { NO_CLASS, STUDENT_ROLES } from "@oj2/contract"
 import { downloadAccountsCsv } from "./accountsCsv"
-import { classLabel, groupClassOptions } from "oj/submission/utils"
+import { classLabel, groupClassOptions } from "utils/classes"
 import { useConfigStore } from "shared/store/config"
 import { useBreakpoints } from "shared/composables/breakpoints"