feat(storefront): 首页改版与筛选体系

- 首页收敛为市场工具条 + 门户行（快捷入口 / 轮播 / 账户面板）
- 筛选按基础 10 项与高级筛选重排，接入皮肤组、段位、地区等参数
- 新增专区、排序、列表/宫格切换，并同步移动端筛选
- 精简导航并统一当前页下划线高亮

frontend/src/app/AppRouter.tsx

@@ -474,6 +474,12 @@ const ProfilePage = lazy(() =>
 const RealnamePage = lazy(() =>
   import('@/features/realname/RealnamePage').then(module => ({ default: module.RealnamePage }))
 )
+const ProcessPage = lazy(() =>
+  import('@/features/help/ProcessPage').then(module => ({ default: module.ProcessPage }))
+)
+const RulesPage = lazy(() =>
+  import('@/features/help/RulesPage').then(module => ({ default: module.RulesPage }))
+)
 const AdminSectionPlaceholder = lazy(() =>
   import('@/layouts/AdminLayout').then(module => ({ default: module.AdminSectionPlaceholder }))
 )
@@ -504,6 +510,8 @@ export function AppRouter() {
           <Route path="messages/:id" element={<ChatPage />} />
           <Route path="profile" element={<ProfilePage />} />
           <Route path="realname" element={<RealnamePage />} />
+          <Route path="process" element={<ProcessPage />} />
+          <Route path="rules" element={<RulesPage />} />
           <Route path="seller/listings" element={<SellerListingsPage />} />
           <Route path="seller/listings/new" element={<SellerListingFormPage />} />
           <Route path="seller/listings/:id" element={<SellerListingDetailPage />} />