优化：完善广告收益顶部筛选默认值

src/app/(main)/ad-revenue-report/page.tsx

@@ -43,6 +43,8 @@ import type {
 import UserAdRevenueDrawer from './UserAdRevenueDrawer';
 
 const { RangePicker } = DatePicker;
+const DEFAULT_PAGE_SIZE = 50;
+const ALL_FILTER_VALUE = '__all__';
 
 // 广告类型标签
 const TYPE_TAG: Record<string, { color: string; label: string }> = {
@@ -387,13 +389,13 @@ export default function AdRevenueReportPage() {
   const [scene, setScene] = useState<string | undefined>();
   const [granularity, setGranularity] = useState<'day' | 'hour'>('day');
   const [sortBy, setSortBy] = useState<'time' | 'ecpm'>('time'); // 明细排序:time=时间倒序 / ecpm=eCPM 倒序
-  const [limit, setLimit] = useState<number>(1000); // 默认拉满接口单页上限，供单次流程广告数分位统计
+  const [limit, setLimit] = useState<number>(DEFAULT_PAGE_SIZE);
   const [page, setPage] = useState<number>(1); // 当前页码(后端分页;1 起)
   const [queriedGranularity, setQueriedGranularity] = useState<'day' | 'hour'>('day'); // 本次结果对应的粒度,决定是否显示「小时」列
   const [queriedMultiDay, setQueriedMultiDay] = useState(false); // 本次结果是否跨多天,决定显示「日期」列 + 按天/按小时图
   const [data, setData] = useState<AdRevenueReport | null>(null);
   const [allFlowItems, setAllFlowItems] = useState<AdRevenueRow[]>([]);
-  const [queriedLimit, setQueriedLimit] = useState<number>(1000);
+  const [queriedLimit, setQueriedLimit] = useState<number>(DEFAULT_PAGE_SIZE);
   const [loading, setLoading] = useState(false);
   const [formulaOpen, setFormulaOpen] = useState(false);
   // 点用户手机号弹出的「用户广告收益详情」半屏抽屉(userId + 手机号;null=关闭)
@@ -775,12 +777,11 @@ export default function AdRevenueReportPage() {
           <Space size={6}>
             <Typography.Text type="secondary">类型</Typography.Text>
             <Select
-              placeholder="全部"
-              value={adType}
-              onChange={setAdType}
-              allowClear
+              value={adType ?? ALL_FILTER_VALUE}
+              onChange={(value) => setAdType(value === ALL_FILTER_VALUE ? undefined : value)}
               style={{ width: 150 }}
               options={[
+                { value: ALL_FILTER_VALUE, label: '全部' },
                 { value: 'reward_video', label: '看视频' },
                 { value: 'draw', label: 'Draw 信息流' },
                 { value: 'withdrawal_video', label: '提现看视频' },
@@ -790,12 +791,11 @@ export default function AdRevenueReportPage() {
           <Space size={6}>
             <Typography.Text type="secondary">场景</Typography.Text>
             <Select
-              placeholder="全部"
-              value={scene}
-              onChange={setScene}
-              allowClear
+              value={scene ?? ALL_FILTER_VALUE}
+              onChange={(value) => setScene(value === ALL_FILTER_VALUE ? undefined : value)}
               style={{ width: 130 }}
               options={[
+                { value: ALL_FILTER_VALUE, label: '全部' },
                 { value: 'comparison', label: '比价' },
                 { value: 'coupon', label: '领券' },
                 { value: 'welfare', label: '福利' },

src/app/(main)/layout.tsx

@@ -91,7 +91,6 @@ const NAV_GROUPS: NavGroup[] = [
       { key: '/users', icon: <UserOutlined />, label: '用户管理' },
     ],
   },
-  { key: '/admins', icon: <TeamOutlined />, label: '权限管理' },
   {
     key: 'monitoring-audit',
     icon: <FileSearchOutlined />,
@@ -104,6 +103,7 @@ const NAV_GROUPS: NavGroup[] = [
       { key: '/audit-logs', icon: <FileSearchOutlined />, label: '审计日志' },
     ],
   },
+  { key: '/admins', icon: <TeamOutlined />, label: '权限管理' },
 ];
 
 // 导航项 key(/dashboard)→ 权限页 key(dashboard),与后端 permissions.py 目录对齐
@@ -223,7 +223,8 @@ export default function MainLayout({ children }: { children: React.ReactNode })
           position: 'sticky',
           top: 0,
           height: '100vh',
-          overflow: 'hidden',
+          overflowY: 'auto',
+          overflowX: 'hidden',
         }}
       >
         <nav className={`side-nav${collapsed ? ' side-nav-collapsed' : ''}`} aria-label="后台导航">
@@ -313,19 +314,8 @@ export default function MainLayout({ children }: { children: React.ReactNode })
         .side-nav {
           display: flex;
           flex-direction: column;
-          box-sizing: border-box;
           gap: 4px;
-          height: calc(100vh - 48px);
-          min-height: 0;
-          overflow-x: hidden;
-          overflow-y: auto;
-          overscroll-behavior: contain;
-          padding: 0 10px 20px;
-          scrollbar-gutter: stable;
-          -webkit-overflow-scrolling: touch;
-        }
-        .side-nav:focus-within {
-          scroll-behavior: smooth;
+          padding: 0 10px 14px;
         }
         .nav-group {
           padding: 6px 0 8px;