fix(前端): 一批表格列静默空白，题单进度点「移除」还会抛

没有 render 的列，naive-ui 直接按 key 取 row[key]。上一批把响应字段改成
camelCase 之后，这些列的 key 还留着 snake_case，取不到值就渲染成空白 ——
排行榜、题单进度、AI 报告、后台首页共 13 处。

这类问题类型检查够不着（列 key 是字符串），是扫「没有 render 的列 key 里
还带下划线」的组合才找出来的。

同一张表还有两处更严重的：

- 「用户」列 key 写的是 user.username，但后台 /admin/problem-sets/:id/progress
  下发的是扁平的 username，没有嵌套 user。
- 点「移除」emit 的是 row.user.id —— row.user 是 undefined，直接抛，
  学生根本移不掉。

test_case 那两处保留：读的是判题机 info.data 的原始键。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

apps/web/src/oj/ai/components/SolvedTable.vue

@@ -134,7 +134,7 @@ const flowchartsColumns: DataTableColumn<FlowchartSummary>[] = [
         () => `${row.problemId} ${row.problemTitle}`,
       ),
   },
-  { title: "提交次数", key: "submission_count", width: 100, align: "center" },
+  { title: "提交次数", key: "submissionCount", width: 100, align: "center" },
   {
     title: "最高分",
     key: "best",
@@ -149,6 +149,6 @@ const flowchartsColumns: DataTableColumn<FlowchartSummary>[] = [
     align: "center",
     render: (row) => parseTime(row.latestSubmissionTime),
   },
-  { title: "平均分", key: "avg_score", width: 100, align: "center" },
+  { title: "平均分", key: "avgScore", width: 100, align: "center" },
 ]
 </script>

apps/web/src/oj/problemset/components/UserProgressView.vue

@@ -111,7 +111,7 @@ const progressColumns = [
     title: "排名",
     key: "rank",
     width: 80,
-    render: (row: ProblemSetProgress, index: number) => {
+    render: (_row: ProblemSetProgress, index: number) => {
       // 计算全局排名：当前页偏移 + 当前行索引 + 1
       const globalRank = (query.page - 1) * query.limit + index + 1
       return globalRank
@@ -132,7 +132,7 @@ const progressColumns = [
   },
   {
     title: "已完成数量",
-    key: "completed_problems_count",
+    key: "completedProblemsCount",
     width: 100,
   },
   {

apps/web/src/oj/rank/list.vue

@@ -295,28 +295,28 @@ const classColumns: DataTableColumn<ClassRank>[] = [
   },
   {
     title: "人数",
-    key: "user_count",
+    key: "userCount",
     width: 80,
     titleAlign: "center",
     align: "center",
   },
   {
     title: "总AC数",
-    key: "total_ac",
+    key: "totalAc",
     width: 90,
     titleAlign: "center",
     align: "center",
   },
   {
     title: "提交数",
-    key: "total_submission",
+    key: "totalSubmission",
     width: 90,
     titleAlign: "center",
     align: "center",
   },
   {
     title: "平均AC数",
-    key: "avg_ac",
+    key: "avgAc",
     width: 100,
     titleAlign: "center",
     align: "center",
@@ -399,13 +399,13 @@ const myClassColumns: DataTableColumn<ClassUserRank["ranks"][number]>[] = [
   },
   {
     title: "已解决",
-    key: "accepted_number",
+    key: "acceptedNumber",
     width: 120,
     align: "center",
   },
   {
     title: "提交数",
-    key: "submission_number",
+    key: "submissionNumber",
     width: 120,
     align: "center",
   },