fix(web): 后台侧栏「新建笔记」上移至首位，移除管理员信息中的「站点所有者」

侧栏 Menu 与移动端 tabbar 同步调换，编辑页高亮新建入口的逻辑不变。

web/src/components/Layout.tsx

@@ -196,8 +196,8 @@ export function AdminTopbar({ title, children }: { title: string; children?: Rea
 }
 
 const adminNav = [
-  { to: '/admin', label: '笔记管理', icon: House, end: true, match: 'exact' as const },
   { to: '/admin/notes/new', label: '新建笔记', icon: PenLine, end: false, match: 'prefix' as const },
+  { to: '/admin', label: '笔记管理', icon: House, end: true, match: 'exact' as const },
   { to: '/admin/trash', label: '回收站', icon: Trash2, end: true, match: 'exact' as const },
   { to: '/admin/settings', label: '设置', icon: Settings, end: true, match: 'exact' as const },
 ]
@@ -245,8 +245,8 @@ function AdminSidebar() {
             type: 'group',
             label: '内容',
             children: [
-              { key: 'notes', icon: <House size={15} />, label: '笔记管理' },
               { key: 'new', icon: <PenLine size={15} />, label: '新建笔记' },
+              { key: 'notes', icon: <House size={15} />, label: '笔记管理' },
             ],
           },
           {
@@ -266,7 +266,6 @@ function AdminSidebar() {
           <span className="pn-admin-avatar">管</span>
           <span className="pn-admin-user-meta">
             <span className="pn-admin-user-name">管理员</span>
-            <span className="pn-admin-user-role">站点所有者</span>
           </span>
           <span className="pn-admin-user-actions">
             <Tooltip title="返回博客" placement="bottom">

web/src/index.css

@@ -1406,10 +1406,6 @@ button.pn-note-back:hover {
   font-weight: 600;
   color: var(--sidebar-foreground);
 }
-.pn-admin-user-role {
-  font-size: 11px;
-  color: var(--muted-foreground);
-}
 /* 主区 / topbar */
 .pn-admin-main {
   min-width: 0;