支持环境变量配置路由模式和资源路径并更新菜单图标HEADmain

新增默认环境配置，通过 VITE_ROUTER_MODE 切换 Hash 与 History 路由，默认使用 Hash；通过 VITE_BASE_URL 配置资源基础路径，默认使用 /。

补充本地环境覆盖、构建方式及部署注意事项文档，保持 .env.local 不纳入版本控制。

桌面侧栏按钮改用 SidebarSimpleIcon，展开时填充、折叠时描边，保留无障碍状态描述。

验证：pnpm lint、pnpm build 和 git diff --check 通过。构建仍有现存的主包超过 500 kB 提示。

2 files changed, 12 insertions, 6 deletions

diff --git a/src/layouts/BasicLayout.tsx b/src/layouts/BasicLayout.tsx
index 9851fd4..512da63 100644
--- a/src/layouts/BasicLayout.tsx
+++ b/src/layouts/BasicLayout.tsx
@@ -14,7 +14,7 @@ import {
   useMantineTheme,
 } from '@mantine/core'
 import { useDisclosure, useMediaQuery } from '@mantine/hooks'
-import { CaretLeftIcon, CaretRightIcon } from '@phosphor-icons/react'
+import { SidebarSimpleIcon } 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'
@@ -181,9 +181,11 @@ export function BasicLayout() {
             aria-expanded={sidebarOpened}
             aria-controls="desktop-navigation"
           >
-            {sidebarOpened
-              ? <CaretLeftIcon size={20} aria-hidden="true" />
-              : <CaretRightIcon size={20} aria-hidden="true" />}
+            <SidebarSimpleIcon
+              size={20}
+              weight={sidebarOpened ? 'fill' : 'regular'}
+              aria-hidden="true"
+            />
           </ActionIcon>
           <Burger
             opened={opened}
diff --git a/src/router.ts b/src/router.ts
index 32870e2..0e6facd 100644
--- a/src/router.ts
+++ b/src/router.ts
@@ -1,8 +1,12 @@
-import { createBrowserRouter } from 'react-router'
+import { createBrowserRouter, createHashRouter } from 'react-router'
 import { BasicLayout } from './layouts/BasicLayout.tsx'
 import { pageRoutes } from './routes.ts'
 
-export const router = createBrowserRouter([
+const createRouter = import.meta.env.VITE_ROUTER_MODE === 'history'
+  ? createBrowserRouter
+  : createHashRouter
+
+export const router = createRouter([
   {
     path: '/',
     Component: BasicLayout,