feat(layout): move navigation menu from sidebar to top header

Switch ProLayout to top layout with a custom horizontal HeaderMenu
(dropdowns for grouped items) and relocate the user/help/version actions
into the header right area.

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

src/layouts/header-menu.tsx

@@ -0,0 +1,128 @@
+import { IconFont } from '@gpustack/core-ui';
+import { Link, useLocation, useNavigate } from '@umijs/max';
+import { Menu } from 'antd';
+import { createStyles } from 'antd-style';
+import React, { useMemo } from 'react';
+
+interface MenuItem {
+  icon?: string;
+  selectedIcon?: string;
+  defaultIcon?: string;
+  children?: MenuItem[];
+
+  [key: string]: any;
+}
+
+interface HeaderMenuProps {
+  menuData: MenuItem[];
+  initialState?: Global.InitialStateType;
+}
+
+const useStyles = createStyles(({ css }) => {
+  return {
+    headerMenu: css`
+      flex: 1;
+      min-width: 0;
+      background: transparent;
+      border-bottom: none;
+      line-height: inherit;
+
+      &.ant-menu-horizontal {
+        border-bottom: none;
+      }
+      &.ant-menu-horizontal > .ant-menu-item::after,
+      &.ant-menu-horizontal > .ant-menu-submenu::after {
+        display: none;
+      }
+      .ant-menu-title-content {
+        display: inline-flex;
+        align-items: center;
+        gap: 8px;
+      }
+      .anticon {
+        font-size: 16px;
+      }
+    `
+  };
+});
+
+const isItemSelected = (item: MenuItem, pathname: string) => {
+  return (
+    pathname === item.path ||
+    (Array.isArray(item.subMenu) && item.subMenu.includes(pathname))
+  );
+};
+
+const HeaderMenu: React.FC<HeaderMenuProps> = (props) => {
+  const { menuData } = props;
+  const { styles } = useStyles();
+  const location = useLocation();
+  const navigate = useNavigate();
+
+  const buildLeaf = (item: MenuItem) => {
+    const selected = isItemSelected(item, location.pathname);
+    return {
+      key: item.path as string,
+      label: (
+        <Link
+          prefetch="intent"
+          to={(item.path as string).replace('/*', '')}
+          target={item.target}
+        >
+          <span className="flex-center gap-8">
+            <IconFont
+              type={selected ? item.selectedIcon || '' : item.defaultIcon || ''}
+            />
+            <span>{item.name}</span>
+          </span>
+        </Link>
+      )
+    };
+  };
+
+  const items = useMemo(() => {
+    return menuData.map((item) => {
+      if (item.children && item.children.length > 0) {
+        return {
+          key: item.key,
+          label: item.name,
+          children: item.children.map((child) => buildLeaf(child))
+        };
+      }
+      return buildLeaf(item);
+    });
+  }, [menuData, location.pathname]);
+
+  const selectedKeys = useMemo(() => {
+    const keys: string[] = [];
+    for (const item of menuData) {
+      const leaves =
+        item.children && item.children.length > 0 ? item.children : [item];
+      for (const leaf of leaves) {
+        if (isItemSelected(leaf, location.pathname)) {
+          keys.push(leaf.path as string);
+        }
+      }
+    }
+    return keys;
+  }, [menuData, location.pathname]);
+
+  const handleClick = ({ key }: { key: string }) => {
+    if (key.startsWith('/')) {
+      navigate(key.replace('/*', ''));
+    }
+  };
+
+  return (
+    <Menu
+      className={styles.headerMenu}
+      mode="horizontal"
+      selectedKeys={selectedKeys}
+      items={items}
+      onClick={handleClick}
+      triggerSubMenuAction="hover"
+    />
+  );
+};
+
+export default HeaderMenu;