task-283(后台迁移收尾/发布): admin-vue 后台工程入库 + Flask 后台整体退役

- 新后台 admin-frontend-vue 整工程入库(base=/admin-vue/、History 路由、Nginx 静态托管方案与 verify-dist 校验)
- Java AdminConsoleController 改为入口重定向: /admin|/admin.html、/login|/login.html -> /admin-vue/; 删除 classpath:static 旧 admin.html/login.html 单页与 admin.js 副本
- Flask 后台整体退役: 删除 admin_api/auth/main 蓝图、web_source 页面、static 脚本与 admin 相关测试; app.py 收敛为仅注册 version_bp(/api/version、/api/version/latest, 供桌面端更新检查)
- AdminApiGuardFilterTest 豁免样例路径 /admin.html -> /admin-vue/

admin-frontend-vue/src/pages/tasks/DuplicateCheckPage.vue

@@ -403,7 +403,7 @@ onMounted(() => {
           <button class="tab" :class="{ active: activeTab === 'dup' }" @click="switchTab('dup')">撞款监控 <span class="t-count">{{ totalDupCount }}</span></button>
           <button class="tab" :class="{ active: activeTab === 'ledger' }" @click="switchTab('ledger')">全部ASIN台账 <span class="t-count">{{ ledgerTotal }}</span></button>
         </div>
-        <el-button text type="primary" @click="groupInfoVisible = true">分组说明</el-button>
+        <el-button class="help-btn" size="small" @click="groupInfoVisible = true">分组说明</el-button>
       </div>
 
       <!-- ============ 撞款监控 ============ -->
@@ -607,9 +607,9 @@ onMounted(() => {
 
 <style scoped>
 .dup-console { max-width: 1560px; }
-.page-heading { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; }
-.page-heading .actions { display: flex; align-items: center; gap: 10px; }
-.updated { color: var(--el-text-color-secondary); font-size: 12px; }
+.page-heading { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
+.page-heading .actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; justify-content: flex-end; margin-left: auto; }
+.updated { color: var(--el-text-color-secondary); font-size: 12px; line-height: 1.4; }
 .filter-grid { display: flex; flex-wrap: wrap; gap: 12px 18px; }
 .f-item { display: flex; flex-direction: column; gap: 6px; width: 170px; }
 .f-item label { color: var(--el-text-color-secondary); font-size: 12px; }
@@ -642,6 +642,8 @@ onMounted(() => {
 .tab.active { background: var(--el-color-primary); color: #fff; }
 .t-count { background: rgba(0, 0, 0, 0.12); border-radius: 10px; padding: 0 7px; font-size: 11px; }
 .tab.active .t-count { background: rgba(255, 255, 255, 0.25); }
+.help-btn.el-button { color: #2f4a63; border-color: #a9c3d9; background: #fff; }
+.help-btn.el-button:hover { color: #1e3b57; border-color: #7fa6c6; background: #edf5fb; }
 .scope-bar { display: flex; align-items: center; gap: 16px; margin-bottom: 14px; flex-wrap: wrap; }
 .seg { display: flex; gap: 4px; background: var(--el-bg-color); border: 1px solid var(--el-border-color-lighter); border-radius: 9px; padding: 4px; }
 .seg-btn { padding: 7px 16px; border-radius: 7px; font-size: 13px; font-weight: 600; color: var(--el-text-color-regular); border: none; background: transparent; cursor: pointer; }