feat(frontend): 管理端页面 — 任务全景树/创建产品/标签打印/认证守卫

App.tsx:
- AntApp + AuthProvider + ToastProvider 三层包裹
- /admin/login 独立登录页
- /admin/* 路由认证守卫

AdminLayout:
- 未登录→跳转登录; 顶部栏显示用户名+登出
- 侧边栏: 全局概览/产品管理/任务全景

CreateProductDialog (Ant Design 重写):
- MOM物料手风琴选择器 (Collapse+Table)
- 分组懒加载 + useRef缓存 + 防抖搜索
- HEX ID只读展示 + 序列号/订单号选填

AdminProductsPage:
- 打印预览弹窗 (Base64标签预览 + 份数选择)
- 打印机设置入口 → AdminPrintConfigPage

扫码组件对齐:
- ProductCard: material_name/spec_model/current_location
- TaskListCard: 递归 task_tree + 状态配色 + 返工/裂变标签
- QueryResult: task_tree 优先
- ScanPage: 宏观状态栏

frontend/src/App.tsx

@@ -1,6 +1,8 @@
 import { BrowserRouter, Routes, Route, Navigate } from "react-router-dom";
+import { App as AntApp } from "antd";
 
 import { ToastProvider } from "./components/ui/Toast";
+import { AuthProvider } from "./contexts/AuthContext";
 import AppLayout from "./components/layout/AppLayout";
 import ScanPage from "./pages/ScanPage";
 import MyTasksPage from "./pages/MyTasksPage";
@@ -8,33 +10,43 @@ import NotificationsPage from "./pages/NotificationsPage";
 import ProfilePage from "./pages/ProfilePage";
 
 import AdminLayout from "./components/layout/AdminLayout";
+import AdminLoginPage from "./pages/admin/AdminLoginPage";
 import AdminDashboard from "./pages/admin/AdminDashboard";
 import AdminProductsPage from "./pages/admin/AdminProductsPage";
 import AdminTasksPage from "./pages/admin/AdminTasksPage";
+import AdminPrintConfigPage from "./pages/admin/AdminPrintConfigPage";
 
 export default function App() {
   return (
-    <ToastProvider>
-      <BrowserRouter>
-        <Routes>
-          {/* 移动端 */}
-          <Route path="/" element={<Navigate to="/scan" replace />} />
-          <Route element={<AppLayout />}>
-            <Route path="/scan" element={<ScanPage />} />
-            <Route path="/tasks" element={<MyTasksPage />} />
-            <Route path="/notifications" element={<NotificationsPage />} />
-            <Route path="/profile" element={<ProfilePage />} />
-          </Route>
+    <AntApp>
+      <ToastProvider>
+        <AuthProvider>
+          <BrowserRouter>
+          <Routes>
+            {/* 移动端 */}
+            <Route path="/" element={<Navigate to="/scan" replace />} />
+            <Route element={<AppLayout />}>
+              <Route path="/scan" element={<ScanPage />} />
+              <Route path="/tasks" element={<MyTasksPage />} />
+              <Route path="/notifications" element={<NotificationsPage />} />
+              <Route path="/profile" element={<ProfilePage />} />
+            </Route>
 
-          {/* PC 管理端 */}
-          <Route path="/admin" element={<Navigate to="/admin/dashboard" replace />} />
-          <Route element={<AdminLayout />}>
-            <Route path="/admin/dashboard" element={<AdminDashboard />} />
-            <Route path="/admin/products" element={<AdminProductsPage />} />
-            <Route path="/admin/tasks" element={<AdminTasksPage />} />
-          </Route>
-        </Routes>
-      </BrowserRouter>
-    </ToastProvider>
+            {/* PC 管理端 — 登录页（独立，无侧边栏） */}
+            <Route path="/admin/login" element={<AdminLoginPage />} />
+
+            {/* PC 管理端 — 需要登录 */}
+            <Route path="/admin" element={<Navigate to="/admin/dashboard" replace />} />
+            <Route element={<AdminLayout />}>
+              <Route path="/admin/dashboard" element={<AdminDashboard />} />
+              <Route path="/admin/products" element={<AdminProductsPage />} />
+              <Route path="/admin/tasks" element={<AdminTasksPage />} />
+              <Route path="/admin/print-config" element={<AdminPrintConfigPage />} />
+            </Route>
+          </Routes>
+          </BrowserRouter>
+        </AuthProvider>
+      </ToastProvider>
+    </AntApp>
   );
 }