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/oj/statistics/components/AttemptSquares.vue

@@ -14,7 +14,7 @@ import { getSubmission } from "oj/api"
 import { JUDGE_STATUS, LANGUAGE_FORMAT_VALUE, SubmissionStatus } from "utils/constants"
 import { parseTime } from "utils/functions"
 import type { SUBMISSION_RESULT } from "utils/types"
-import { useTone, type Tone } from "oj/submission/composables/tone"
+import { useTone, type Tone } from "shared/composables/tone"
 
 /**
  * 一个人在一道题上的每一次提交，一格一次、从早到晚（设计稿「统计重设计」）。

apps/web/src/oj/statistics/components/ByClass.vue

@@ -2,8 +2,9 @@
 import { useThemeVars } from "naive-ui"
 import { NO_CLASS, type SubmissionStatisticsGrid } from "@oj2/contract"
 import { SubmissionStatus } from "utils/constants"
-import { useTone } from "oj/submission/composables/tone"
-import { classLabel, submissionDayText } from "oj/submission/utils"
+import { useTone } from "shared/composables/tone"
+import { classLabel } from "utils/classes"
+import { submissionDayText } from "oj/submission/utils"
 
 /**
  * 没选班级、也没填学生时（多半是从题目页进来，只带了题号）：先按班级列出来，

apps/web/src/oj/statistics/components/CodeStats.vue

@@ -5,7 +5,7 @@ import type { SubmissionStatistics, SubmissionStatisticsGrid } from "@oj2/contra
 import { SubmissionStatus } from "utils/constants"
 import { parseTime } from "utils/functions"
 import StatusPill from "oj/submission/components/StatusPill.vue"
-import { useTone } from "oj/submission/composables/tone"
+import { useTone } from "shared/composables/tone"
 import UserName from "shared/components/UserName.vue"
 import AttemptSquares from "./AttemptSquares.vue"
 

apps/web/src/oj/statistics/components/FlowStats.vue

@@ -18,7 +18,7 @@ import { Bar, Doughnut, Radar } from "vue-chartjs"
 import type { FlowchartStatistics } from "@oj2/contract"
 import { useChartTheme } from "shared/composables/chartTheme"
 import { FLOWCHART_CRITERIA_ORDER } from "utils/constants"
-import { useTone } from "oj/submission/composables/tone"
+import { useTone } from "shared/composables/tone"
 import RingChart from "./RingChart.vue"
 import StatItem from "./StatItem.vue"
 import UserName from "shared/components/UserName.vue"

apps/web/src/oj/statistics/components/Lessons.vue

@@ -3,8 +3,8 @@ import { Icon } from "@iconify/vue"
 import { useThemeVars } from "naive-ui"
 import type { SubmissionLessons } from "@oj2/contract"
 import { parseTime, zonedParts } from "utils/functions"
-import { useTone } from "oj/submission/composables/tone"
-import { classLabel } from "oj/submission/utils"
+import { useTone } from "shared/composables/tone"
+import { classLabel } from "utils/classes"
 import { resultName, useResultColor } from "../results"
 
 type Lesson = SubmissionLessons["lessons"][number]

apps/web/src/oj/statistics/components/StatItem.vue

@@ -1,6 +1,6 @@
 <script setup lang="ts">
 import { useThemeVars } from "naive-ui"
-import { useTone, type Tone } from "oj/submission/composables/tone"
+import { useTone, type Tone } from "shared/composables/tone"
 
 /** 数字行的一格：小字标签 + 大号数字 + 单位 */
 const props = defineProps<{

apps/web/src/oj/statistics/components/StatisticsView.vue

@@ -16,8 +16,8 @@ import {
 } from "oj/api"
 import { useConfigStore } from "shared/store/config"
 import { fromPickerValue, toPickerValue } from "utils/functions"
-import { useTone } from "oj/submission/composables/tone"
-import { classSelectOptions } from "oj/submission/utils"
+import { useTone } from "shared/composables/tone"
+import { classSelectOptions } from "utils/classes"
 import { DEFAULT_PERIOD, PERIOD_OPTIONS, dayStartOfDate, periodRange, type Period } from "../period"
 import { resultName, useResultColor } from "../results"
 import ByClass from "./ByClass.vue"

apps/web/src/oj/statistics/results.ts

@@ -1,7 +1,7 @@
 import { useThemeVars } from "naive-ui"
 import { JUDGE_STATUS } from "utils/constants"
 import type { SUBMISSION_RESULT } from "utils/types"
-import { useTone, type Tone } from "oj/submission/composables/tone"
+import { useTone, type Tone } from "shared/composables/tone"
 
 export function resultName(result: number) {
   return JUDGE_STATUS[result as SUBMISSION_RESULT]?.name ?? "其他"