feat(frontend): 对齐工作区布局与 toaster/command palette

frontend/src/app/workspace/layout.tsx

@@ -3,9 +3,9 @@
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { useSearchParams } from "next/navigation";
 import { useCallback, useEffect, useLayoutEffect, useState } from "react";
+import { Toaster } from "sonner";
 
 import { SidebarInset, SidebarProvider } from "@/components/ui/sidebar";
-import { Toaster } from "@/components/ui/sonner";
 import { CommandPalette } from "@/components/workspace/command-palette";
 import { WorkspaceSidebar } from "@/components/workspace/workspace-sidebar";
 import { getLocalSettings, useLocalSettings } from "@/core/settings";
@@ -47,34 +47,7 @@ export default function WorkspaceLayout({
         <SidebarInset className="min-w-0">{children}</SidebarInset>
       </SidebarProvider>
       <CommandPalette />
-      <Toaster
-        position="top-center"
-        toastOptions={{
-          duration: 2200,
-          classNames: {
-            toast: [
-              /* 灰色圆角矩形容器 */
-              "rounded-[20px] border-none",
-              /* 浅灰色背景 + 轻微透明 */
-              "bg-[#999999]! backdrop-blur-sm",
-              /* 阴影极轻 */
-              "shadow-[0_2px_12px_0_rgba(0,0,0,0.18)]",
-              /* 内边距：宽松居中 */
-              "px-5 py-2.5",
-              /* 单行布局，内容水平居中 */
-              "flex items-center justify-center gap-0",
-              /* 整体文字样式 */
-              "text-white text-sm font-normal font-sans",
-              /* 去掉 icon 区域间距 */
-              "[&>[data-icon]]:hidden",
-            ].join(" "),
-            title:
-              "text-white! text-sm font-normal text-center w-full leading-snug",
-            description: "hidden",
-            icon: "hidden",
-          },
-        }}
-      />
+      <Toaster position="top-center" />
     </QueryClientProvider>
   );
 }