diff --git a/src/components/ui/sonner.tsx b/src/components/ui/sonner.tsx
new file mode 100644
index 0000000..ed76aab
--- /dev/null
+++ b/src/components/ui/sonner.tsx
@@ -0,0 +1,26 @@
+import { Toaster as Sonner } from 'sonner';
+import { useThemeMode } from '@/providers/ThemeModeProvider';
+
+type ToasterProps = React.ComponentProps<typeof Sonner>;
+
+export function Toaster(props: ToasterProps) {
+  const { resolvedMode } = useThemeMode();
+
+  return (
+    <Sonner
+      theme={resolvedMode}
+      className="toaster group"
+      position="bottom-center"
+      toastOptions={{
+        classNames: {
+          toast:
+            'group toast group-[.toaster]:bg-background group-[.toaster]:text-foreground group-[.toaster]:border-border group-[.toaster]:shadow-lg',
+          description: 'group-[.toast]:text-muted-foreground',
+          actionButton: 'group-[.toast]:bg-primary group-[.toast]:text-primary-foreground',
+          cancelButton: 'group-[.toast]:bg-muted group-[.toast]:text-muted-foreground',
+        },
+      }}
+      {...props}
+    />
+  );
+}
diff --git a/src/providers/AppRoot.tsx b/src/providers/AppRoot.tsx
index ac52fad..d46fcaa 100644
--- a/src/providers/AppRoot.tsx
+++ b/src/providers/AppRoot.tsx
@@ -1,6 +1,7 @@
 import React from 'react';
 import { ThemeModeProvider } from './ThemeModeProvider';
 import { RouterProvider } from './RouterProvider';
+import { Toaster } from '@/components/ui/sonner';
 
 interface AppRootProps {
   children: React.ReactNode;
@@ -11,6 +12,7 @@ export default function AppRoot({ children }: AppRootProps) {
     <React.StrictMode>
       <ThemeModeProvider>
         <RouterProvider>{children}</RouterProvider>
+        <Toaster />
       </ThemeModeProvider>
     </React.StrictMode>
   );
diff --git a/src/utils/chromeI18n.ts b/src/utils/chromeI18n.ts
index f7182f3..e172fd5 100644
--- a/src/utils/chromeI18n.ts
+++ b/src/utils/chromeI18n.ts
@@ -26,12 +26,8 @@ export function useI18n(namespace?: string | string[]) {
   const namespaces = Array.isArray(namespace) ? namespace : namespace ? [namespace] : [];
 
   const t = (key: string, options?: Record<string, unknown>): string => {
-    let msgId = key;
-
-    // 处理 namespace:key 格式（兼容原 i18next 用法）
-    if (key.includes(':')) {
-      msgId = key.replace(':', '_').replace(/\./g, '_');
-    }
+    // 统一将分隔符转换为下划线，兼容 'namespace:key.path' 和 'key.path' 两种写法
+    const msgId = key.replace(':', '_').replace(/\./g, '_');
 
     // 先尝试直接查找 key
     let message = getMessage(msgId);