style(后台): 后台各张列表都改成斑马底纹（题目、用户、比赛、公告、练一练记录、标签、AI 报告、成就）

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

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

@@ -141,11 +141,16 @@ onMounted(load)
   flex-direction: column;
 }
 
+/* 斑马底纹，和后台其它列表一样 */
+.group:nth-child(even) {
+  background: v-bind("theme.tableColorStriped");
+}
+
 .group {
   display: flex;
   align-items: center;
   gap: 12px;
-  padding: 8px 0;
+  padding: 8px 10px;
   border-bottom: 1px solid v-bind("theme.dividerColor");
 }
 

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

@@ -174,6 +174,11 @@ watchDebounced(
   border-bottom: 0;
 }
 
+/* 斑马底纹，和后台其它列表一样 */
+.item:nth-child(even) {
+  background: v-bind("theme.tableColorStriped");
+}
+
 .item:hover {
   background: v-bind("theme.hoverColor");
 }

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

@@ -123,7 +123,7 @@ watch(query, listAnnouncements, { deep: true })
       </n-button>
     </template>
   </PageHeader>
-  <n-data-table class="ann-table" :columns="columns" :data="announcements" />
+  <n-data-table striped class="ann-table" :columns="columns" :data="announcements" />
   <Pagination :total="total" v-model:limit="query.limit" v-model:page="query.page" />
 </template>
 

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

@@ -138,7 +138,7 @@ watchDebounced(() => query.keyword, listContests, {
       <n-input v-model:value="query.keyword" placeholder="比赛名" clearable style="width: 220px" />
     </template>
   </PageHeader>
-  <n-data-table class="contest-table" :columns="columns" :data="contests" />
+  <n-data-table striped class="contest-table" :columns="columns" :data="contests" />
   <Pagination :total="total" v-model:limit="query.limit" v-model:page="query.page" />
 </template>
 

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

@@ -58,6 +58,7 @@ onMounted(async () => {
 
 <template>
   <n-data-table
+    striped
     :loading="loading"
     :columns="columns"
     :data="rows"

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

@@ -348,6 +348,7 @@ watch(() => [query.page, query.limit, query.author, query.kind, query.visible],
     <n-button size="small" quaternary @click="selectedRowKeys = []">取消选择</n-button>
   </div>
   <n-data-table
+    striped
     class="problem-table"
     :columns="columns"
     :data="problems"

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

@@ -240,6 +240,11 @@ watchDebounced(keyword, listTags, { debounce: 500, maxWait: 1000 })
   border-bottom: 0;
 }
 
+/* 斑马底纹，和后台其它列表一样（用户要的） */
+.row:nth-child(even) {
+  background: v-bind("theme.tableColorStriped");
+}
+
 .name {
   flex: 0 0 120px;
   min-width: 0;

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

@@ -345,6 +345,7 @@ watch(() => [query.page, query.limit, query.type, query.orderBy, query.className
     </template>
   </PageHeader>
   <n-data-table
+    striped
     class="user-table"
     :data="users"
     :columns="columns"