diff --git a/apps/web/src/oj/submission/list.vue b/apps/web/src/oj/submission/list.vue
index d475c76..ad9a2a7 100644
--- a/apps/web/src/oj/submission/list.vue
+++ b/apps/web/src/oj/submission/list.vue
@@ -195,7 +195,21 @@ async function rejudge(submissionID: string) {
 }
 
 async function retryFlowchart(submissionId: string) {
-  await retryFlowchartSubmission(submissionId)
+  // 后端会拒掉「还在评分中」的提交（409 retry-not-allowed），也可能撞上限流。
+  // 不兜住的话拦截器静默 reject，老师点下去完全没反应。
+  // 按错误码分支而不是 match 文案（见 utils/api.ts 的约定）——后端文案是英文的，
+  // 直接弹给老师看不合适
+  const retryTips: Record<string, string> = {
+    "retry-not-allowed": "这条还在评分中，等出了结果再重新评分",
+    "too-many-submissions": "操作太频繁了，缓一下再试",
+    "flowchart-not-found": "提交不存在，或者没有权限",
+  }
+  try {
+    await retryFlowchartSubmission(submissionId)
+  } catch (err: any) {
+    message.error(retryTips[err?.error] ?? "重新评分失败")
+    return
+  }
   message.success("重新评分已提交")
   listSubmissions()
 }
diff --git a/apps/web/src/shared/components/FlowchartStatisticsPanel.vue b/apps/web/src/shared/components/FlowchartStatisticsPanel.vue
index b110438..79f2204 100644
--- a/apps/web/src/shared/components/FlowchartStatisticsPanel.vue
+++ b/apps/web/src/shared/components/FlowchartStatisticsPanel.vue
@@ -203,6 +203,8 @@ interface Props {
 
 const props = defineProps<Props>()
 
+const message = useMessage()
+
 const durationOptions: SelectOption[] = [
   { label: "10分钟内", value: "minutes:10" },
   { label: "20分钟内", value: "minutes:20" },
@@ -528,12 +530,18 @@ async function handleStatistics() {
     query.duration === "all"
       ? { end }
       : { start: formatISO(sub(current, subOptions.value)), end }
-  const res = await getFlowchartStatistics(
-    duration,
-    query.problem,
-    query.username,
-  )
-  Object.assign(data, res)
+  try {
+    const res = await getFlowchartStatistics(
+      duration,
+      query.problem,
+      query.username,
+    )
+    Object.assign(data, res)
+  } catch (error) {
+    message.error("获取流程图统计失败")
+    console.error("获取流程图统计失败:", error)
+    return
+  }
   await nextTick()
   renderWordCloud()
 }