初始化 React TypeScript 模板并实现 Mantine 响应式基础布局

- 使用 Vite、React 和 TypeScript 初始化项目，配置 pnpm、Oxlint 与 Mantine PostCSS
- 接入 React Router Data Mode，将页面路由、菜单标题和图标统一维护在路由配置中
- 添加首页、关于概览与关于我页面，使用 Nested NavLinks 根据路由生成多级菜单
- 实现桌面侧栏展开和图标模式、移动端全宽抽屉以及与品牌区对齐的顶栏
- 将布局自定义样式拆分为 CSS Modules，统一 xs 间距并固定菜单图标列位置
- 添加文档流页脚，展示自动更新年份的示例版权说明
- 配置 Mantine 默认圆角、项目说明及中文提交约定

验证：pnpm build、pnpm lint、git diff --cached --check 均通过。

1 files changed, 225 insertions, 0 deletions

diff --git a/src/layouts/BasicLayout.tsx b/src/layouts/BasicLayout.tsx
new file mode 100644
index 0000000..6af8564
--- /dev/null
+++ b/src/layouts/BasicLayout.tsx
@@ -0,0 +1,225 @@
+import { useEffect, useState } from 'react'
+import {
+  AppShell,
+  ActionIcon,
+  Box,
+  Burger,
+  Drawer,
+  Group,
+  NavLink,
+  Stack,
+  Text,
+  Tooltip,
+  rem,
+  useMantineTheme,
+} from '@mantine/core'
+import { useDisclosure, useMediaQuery } from '@mantine/hooks'
+import { CaretLeftIcon, CaretRightIcon } from '@phosphor-icons/react'
+import { NavLink as RouterNavLink, Outlet, useLocation, useMatches } from 'react-router'
+import { pageRoutes } from '../routes.ts'
+import type { PageRoute } from '../routes.ts'
+import classes from './BasicLayout.module.css'
+
+const collapsedNavbarWidth = rem(64)
+
+type NavigationProps = {
+  onNavigate?: () => void
+  collapsed?: boolean
+  routes?: PageRoute[]
+  parentPath?: string
+}
+
+function NavigationItem({
+  route,
+  parentPath,
+  collapsed,
+  onNavigate,
+}: {
+  route: PageRoute
+  parentPath: string
+  collapsed: boolean
+  onNavigate?: () => void
+}) {
+  const matches = useMatches()
+  const active = matches.some((match) => match.id === route.id)
+  const selected = matches.at(-1)?.id === route.id
+  const [opened, setOpened] = useState(active)
+
+  if (!route.handle) return null
+
+  const { title: label, icon: Icon } = route.handle
+  const to = !route.path
+    ? parentPath
+    : route.path.startsWith('/')
+      ? route.path
+      : `${parentPath.replace(/\/$/, '')}/${route.path}`
+  const hasChildren = route.children?.some((child) => child.handle)
+  const sharedProps = {
+    label,
+    noWrap: true,
+    p: 'xs',
+    'aria-label': label,
+    leftSection: <Icon size={20} aria-hidden="true" />,
+    active,
+    'data-collapsed': collapsed || undefined,
+    classNames: {
+      root: classes.menuItem,
+      section: classes.icon,
+      body: classes.label,
+    },
+  }
+
+  return (
+    <Tooltip label={label} position="right" disabled={!collapsed}
+      events={{ hover: true, focus: true, touch: false }}>
+      {hasChildren ? (
+        <NavLink
+          {...sharedProps}
+          component="button"
+          variant={selected ? 'light' : 'subtle'}
+          type="button"
+          opened={opened}
+          onChange={setOpened}
+          childrenOffset={collapsed ? 0 : 'xs'}
+        >
+          <Navigation
+            routes={route.children}
+            parentPath={to}
+            collapsed={collapsed}
+            onNavigate={onNavigate}
+          />
+        </NavLink>
+      ) : (
+        <NavLink
+          {...sharedProps}
+          component={RouterNavLink}
+          to={to}
+          end
+          onClick={onNavigate}
+        />
+      )}
+    </Tooltip>
+  )
+}
+
+function Navigation({
+  onNavigate,
+  collapsed = false,
+  routes = pageRoutes,
+  parentPath = '/',
+}: NavigationProps) {
+  const { key } = useLocation()
+
+  return (
+    <Stack gap="xs" style={{ '--collapsed-navigation-width': collapsedNavbarWidth }}>
+      {routes.map((route) => (
+        <NavigationItem
+          key={`${route.id}:${key}`}
+          route={route}
+          parentPath={parentPath}
+          collapsed={collapsed}
+          onNavigate={onNavigate}
+        />
+      ))}
+    </Stack>
+  )
+}
+
+export function BasicLayout() {
+  const theme = useMantineTheme()
+  const desktop = useMediaQuery(`(min-width: ${theme.breakpoints.sm})`)
+  const [opened, { toggle, close }] = useDisclosure(false)
+  const [sidebarOpened, { toggle: toggleSidebar }] = useDisclosure(true)
+  const { key } = useLocation()
+  const matches = useMatches()
+  const title = matches
+    .map(({ handle }) => (
+      handle && typeof handle === 'object' && 'title' in handle && typeof handle.title === 'string'
+        ? handle.title
+        : undefined
+    ))
+    .findLast((value) => value !== undefined) ?? 'Template React'
+
+  useEffect(() => {
+    close()
+  }, [key, close])
+
+  useEffect(() => {
+    if (desktop) close()
+  }, [desktop, close])
+
+  return (
+    <AppShell
+      layout="alt"
+      header={{ height: 60 }}
+      navbar={{
+        width: sidebarOpened ? 240 : collapsedNavbarWidth,
+        breakpoint: 'sm',
+        collapsed: { mobile: true },
+      }}
+    >
+      <AppShell.Navbar id="desktop-navigation" aria-label="主导航">
+        <Text fw={700} size="lg" px="xs" className={classes.brand}
+          data-collapsed={!sidebarOpened || undefined} aria-label="Template React">
+          {sidebarOpened ? 'Template React' : 'TR'}
+        </Text>
+        <Box p="xs">
+          <Navigation collapsed={!sidebarOpened} />
+        </Box>
+      </AppShell.Navbar>
+
+      <AppShell.Header>
+        <Group h="100%" px="md">
+          <ActionIcon
+            onClick={toggleSidebar}
+            visibleFrom="sm"
+            size="lg"
+            variant="subtle"
+            color="gray"
+            aria-label={sidebarOpened ? '折叠菜单' : '展开菜单'}
+            aria-expanded={sidebarOpened}
+            aria-controls="desktop-navigation"
+          >
+            {sidebarOpened
+              ? <CaretLeftIcon size={20} aria-hidden="true" />
+              : <CaretRightIcon size={20} aria-hidden="true" />}
+          </ActionIcon>
+          <Burger
+            opened={opened}
+            onClick={toggle}
+            hiddenFrom="sm"
+            size="sm"
+            aria-label={opened ? '关闭菜单' : '打开菜单'}
+            aria-expanded={opened}
+            aria-controls="mobile-navigation"
+          />
+          <Text fw={600}>{title}</Text>
+        </Group>
+      </AppShell.Header>
+
+      <AppShell.Main component="div" className={classes.main}>
+        <Box component="main" p="md" className={classes.content}>
+          <Outlet />
+        </Box>
+        <Box component="footer" px="md" py="xs" className={classes.footer}>
+          <Text size="xs" c="dimmed" ta="center">
+            © {new Date().getFullYear()} Template React. 仅供示例使用。
+          </Text>
+        </Box>
+      </AppShell.Main>
+
+      <Drawer
+        opened={opened && !desktop}
+        onClose={close}
+        title="Template React"
+        position="left"
+        size="100%"
+        closeButtonProps={{ 'aria-label': '关闭菜单' }}
+      >
+        <nav id="mobile-navigation" aria-label="移动端主导航">
+          <Navigation onNavigate={close} />
+        </nav>
+      </Drawer>
+    </AppShell>
+  )
+}