fix(题目): 修掉代码审查查出的几处问题——流程图拿到的徽章不弹、点评弹窗读失败时关不掉等

- 流程图画到 A / S 拿到的题单徽章、成就原来不弹：流程图那条 WebSocket 只认评分完成 / 失败，
  成就消息被丢掉了，要等下次换路由拉 pending 才出来
- 强制点评弹窗读不出点评、或者一直交不上时，「下一题 / 继续」按钮也给出来：原来弹窗关不掉，
  只能按浏览器后退；拦下换题时就记上「继续」，按钮文字不会写错
- 「放回编辑器」走正常的换语言路子（画流程图时切回代码编辑器、读那门语言的草稿）；
  这道题已经不收的语言（0020 摘掉的 Java / JS / Go）置灰，只能复制
- 举着手时刚交对、1.5 秒内点下一题：原来「确定要换题吗」要问两遍（点评完再问一次），
  现在同意过的那个地址不再问
- 课堂看板上评分中、评失败的流程图不再算「尝试过」，和学生的课堂条一个口径；
  新加的流程图查询和其他查询并行，不再多等一轮数据库
- 课堂条的数据只认最后发出的那次请求：进页面那次后到的话会把刚做完的那道盖回「没做」
- 「A / S 算做完」收进契约，前后端只留一份；协作中老师的判断统一用 useTeacherCollab；
  几处放错位置、说法过时的注释

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

apps/web/src/oj/problem/components/EditorToolbar.vue

@@ -14,6 +14,7 @@ import { NFlex } from "naive-ui"
 import SubmitCode from "./SubmitCode.vue"
 import { useProblemPageContext } from "../composables/problemPageContext"
 import { statisticsOpen, useEditorMenu } from "../composables/editorMenu"
+import { useTeacherCollab } from "../composables/teacherCollab"
 
 const SubmitFlowchart = defineAsyncComponent(() => import("./SubmitFlowchart.vue"))
 
@@ -73,14 +74,10 @@ const showHelpButton = computed(
 )
 
 /**
- * 教师端：协作就开在这道题上。接单后直接跳到题目页协作（原来是 CollabModal 弹框），
- * 所以状态和「结束协作」得摆在题目页的工具栏上 —— 也只有这一个按钮能结束，
- * 不像弹框那样按一下 Esc 就把协作关掉了。
+ * 教师正在这道题上协作：编辑器里是学生的代码。协作状态和「结束协作」在工具栏上面那条
+ * 协作条里（CollabBar）；工具栏这边禁掉语言选择、不给「写代码 / 画流程图」切换
  */
-const collabHere = computed(
-  () => collabStore.room !== null && collabStore.room.problemId === problem.value?._id,
-)
-const showCollabBar = computed(() => collabHere.value && userStore.isTeacherOrAbove)
+const showCollabBar = useTeacherCollab()
 
 /**
  * 状态全塞进按钮本身。原来旁边还挂一个 n-tag 说明排队情况，一行工具栏

apps/web/src/oj/problem/components/FlowchartResult.vue

@@ -56,7 +56,7 @@ const suggestions = computed(() =>
 )
 
 function gradeType(grade: string) {
-  if (grade === "S" || grade === "A") return "success"
+  if (isFlowchartPass(grade)) return "success"
   if (grade === "B") return "warning"
   return "error"
 }

apps/web/src/oj/problem/components/ProblemEditor.vue

@@ -12,6 +12,7 @@ import { beginEditTrace, editTraceExtensions } from "oj/problem/utils/editTrace"
 import { errorMarkExtensions } from "oj/problem/utils/errorMark"
 import EditorToolbar from "./EditorToolbar.vue"
 import { useDraftKey } from "../composables/draftKey"
+import { useTeacherCollab } from "../composables/teacherCollab"
 import CollabBar from "./CollabBar.vue"
 import { useFlowchartStore } from "oj/store/flowchart"
 
@@ -39,7 +40,7 @@ const collabHere = computed(
 )
 
 /** 协作中的教师：编辑器里是学生的代码，不是他自己的 */
-const teacherCollab = computed(() => collabHere.value && collabStore.isTeacher)
+const teacherCollab = useTeacherCollab()
 
 /** 教师接单前自己选的语言，协作结束后连同草稿一起还原 */
 let teacherLanguageBefore: LANGUAGE | null = null

apps/web/src/oj/problem/components/ProblemReaction.vue

@@ -347,7 +347,14 @@ function sectorAriaLabel(index: number) {
     </div>
 
     <p v-if="submitFailed" class="error">没记上，再点一次</p>
-    <div v-if="state === 'results' && $slots.after" class="after">
+    <!--
+      强制弹窗关不掉，这个插槽（「下一题 / 继续」）是唯一的出口：读不出点评、交点评失败时也得给，
+      不能把学生关在弹窗里（设计文档第 7 节：接口出错时不能把学生卡住）
+    -->
+    <div
+      v-if="(state === 'results' || state === 'failed' || submitFailed) && $slots.after"
+      class="after"
+    >
       <slot name="after" />
     </div>
   </section>

apps/web/src/oj/problem/components/ProblemSubmission.vue

@@ -1,6 +1,7 @@
 <script lang="ts" setup>
 import { getRankOfProblem, getSubmission, getSubmissions } from "oj/api"
 import { useCodeStore } from "oj/store/code"
+import { useProblemStore } from "oj/store/problem"
 import Pagination from "shared/components/Pagination.vue"
 import SubmissionResultTag from "shared/components/SubmissionResultTag.vue"
 import { useCollabStore } from "shared/store/collab"
@@ -22,6 +23,7 @@ import { useTeacherCollab } from "../composables/teacherCollab"
 
 const userStore = useUserStore()
 const codeStore = useCodeStore()
+const problemStore = useProblemStore()
 const collabStore = useCollabStore()
 const ctx = useProblemPageContext()
 const route = useRoute()
@@ -139,11 +141,22 @@ function loadedOf(id: string): Loaded | null {
   return value && typeof value === "object" ? value : null
 }
 
-function putBack(id: string) {
+/** 这道题现在还收不收那次提交的语言（0020 从题目里摘掉了 Java / JS / Go，老提交还在） */
+function canPutBack(id: string) {
   const loaded = loadedOf(id)
-  if (!loaded) return
+  return !!loaded && problemStore.codeLanguages.some((language) => language === loaded.language)
+}
+
+async function putBack(id: string) {
+  const loaded = loadedOf(id)
+  if (!loaded || !canPutBack(id)) return
+  // 语言不一样就先按正常的路子切过去（存语言偏好、读那门语言的草稿；画流程图时切回代码编辑器），
+  // 等编辑器切完再放代码 —— 直接改 codeStore 的语言会绕过这些，草稿存错地方
+  if (codeStore.code.language !== loaded.language) {
+    problemStore.switchLanguage(loaded.language)
+    await nextTick()
+  }
   // 同一个编辑器里 dispatch 一次整段替换，CodeMirror 的历史记着它，Ctrl+Z 能撤回
-  codeStore.setLanguage(loaded.language)
   codeStore.setCode(loaded.code)
   message.success("已放回编辑器，按 Ctrl+Z 可以撤回")
 }
@@ -233,6 +246,12 @@ watch(query, () => {
                 size="small"
                 type="primary"
                 secondary
+                :disabled="!canPutBack(row.id)"
+                :title="
+                  canPutBack(row.id)
+                    ? undefined
+                    : `这道题现在不收 ${LANGUAGE_SHOW_VALUE[loadedOf(row.id)!.language]} 了，只能复制`
+                "
                 @click="putBack(row.id)"
               >
                 放回编辑器

apps/web/src/oj/problem/components/SubmissionEffects.vue

@@ -43,6 +43,9 @@ const commentPanel = ref(false)
 const reviewOwed = ref(false)
 let reviewChecking = false
 let navigationAfterReview: string | null = null
+// navigationAfterReview 是普通变量（守卫里改，不需要触发渲染），弹窗按钮的文案（「继续」）
+// 要一个响应式的影子：拦下的那一刻就记上，点评读不出来、交不上时按钮也得写对
+const navigationAfterReviewShown = ref(false)
 
 async function openReview() {
   if (reviewChecking) return
@@ -67,6 +70,7 @@ function settleReview() {
   reviewOwed.value = false
   const target = navigationAfterReview
   navigationAfterReview = null
+  navigationAfterReviewShown.value = false
   if (target) router.push(target)
 }
 
@@ -86,9 +90,6 @@ const reviewed = ref(false)
 const continueButton = useTemplateRef<{ $el: HTMLElement }>("continueButton")
 const lessonStore = useLessonStore()
 
-// navigationAfterReview 是普通变量（守卫里改，不需要触发渲染），按钮文案要一个响应式的影子
-const navigationAfterReviewShown = ref(false)
-
 /** 题目名中位 7 字、最长 33 字，按钮里放不下那么长的 */
 const shortTitle = (title: string) => (title.length > 14 ? `${title.slice(0, 13)}…` : title)
 
@@ -106,7 +107,6 @@ const continueAction = computed(() => {
 
 async function onReviewed() {
   reviewed.value = true
-  navigationAfterReviewShown.value = navigationAfterReview !== null
   await nextTick()
   continueButton.value?.$el.focus()
 }
@@ -132,6 +132,7 @@ function holdForReview(to: RouteLocationNormalized, from: RouteLocationNormalize
   if (!reviewOwed.value || commentPanel.value) return true
   if (to.name === from.name && to.params.problemID === from.params.problemID) return true
   navigationAfterReview = to.fullPath
+  navigationAfterReviewShown.value = true
   cancelCommentPanel()
   openReview()
   return false
@@ -167,6 +168,7 @@ watch(
     cancelCommentPanel()
     reviewOwed.value = false
     navigationAfterReview = null
+    navigationAfterReviewShown.value = false
     cancelGoToProblemSet()
   },
 )

apps/web/src/oj/problem/detail.vue

@@ -140,9 +140,19 @@ watch(
  */
 const collabStore = useCollabStore()
 const dialog = useDialog()
+/**
+ * 已经同意过要去的地方。通过之后 1.5 秒内点「下一题」：这里先问一次，接着被强制点评拦下
+ * （SubmissionEffects 的 holdForReview），评完再 push 同一个地址 —— 不记着的话会再问一遍，
+ * 第二次点「留在这道题」就成了同意换题之后又被留下
+ */
+let approvedTarget: string | null = null
 function confirmLeavingHelp(to: RouteLocationNormalized, from: RouteLocationNormalized) {
   if (collabStore.isTeacher || collabStore.helpStatus === "idle") return true
   if (to.name === from.name && to.params.problemID === from.params.problemID) return true
+  if (approvedTarget === to.fullPath) {
+    approvedTarget = null
+    return true
+  }
   const active = collabStore.helpStatus === "active"
   return new Promise<boolean>((resolve) => {
     dialog.warning({
@@ -152,7 +162,10 @@ function confirmLeavingHelp(to: RouteLocationNormalized, from: RouteLocationNorm
         : "换题之后这次举手就撤掉了，要在新的题目里重新举手。确定要换吗？",
       positiveText: "换题",
       negativeText: "留在这道题",
-      onPositiveClick: () => resolve(true),
+      onPositiveClick: () => {
+        approvedTarget = to.fullPath
+        resolve(true)
+      },
       onNegativeClick: () => resolve(false),
       onClose: () => resolve(false),
       onMaskClick: () => resolve(false),
@@ -161,6 +174,13 @@ function confirmLeavingHelp(to: RouteLocationNormalized, from: RouteLocationNorm
 }
 onBeforeRouteUpdate(confirmLeavingHelp)
 onBeforeRouteLeave(confirmLeavingHelp)
+// 到了就作废：没被点评拦下、一次就换过去的，不能留着让下次去同一道题时不再问
+watch(
+  () => route.fullPath,
+  (path) => {
+    if (path === approvedTarget) approvedTarget = null
+  },
+)
 
 // 结果页签的标题带状态图标（ResultTabLabel），n-tab-pane 的 tab 接受渲染函数
 const resultTab = () => h(ResultTabLabel)