diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index e2cf001..0574b03 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -1,4 +1,4 @@
-import React, { useState, useEffect } from 'react';
+import  { useState, useEffect } from 'react';
 import { AlertCircle, RefreshCw } from 'lucide-react';
 import { ApiKeyForm } from './components/ApiKeyForm';
 import { ApiKeyCard } from './components/ApiKeyCard';
diff --git a/frontend/src/components/ApiKeyCard.tsx b/frontend/src/components/ApiKeyCard.tsx
index 75d3b0a..2a9e056 100644
--- a/frontend/src/components/ApiKeyCard.tsx
+++ b/frontend/src/components/ApiKeyCard.tsx
@@ -1,5 +1,5 @@
-import React, { useState } from 'react';
-import { CheckCircle2, XCircle, Loader2, Trash2, RefreshCw, Copy, Eye, EyeOff } from 'lucide-react';
+import  { useState } from 'react';
+import { CheckCircle2, XCircle,Trash2, RefreshCw, Copy, Eye, EyeOff } from 'lucide-react';
 import { apiKeyService } from '../services/api';
 import type { ApiKey } from '../types/api';
 
diff --git a/frontend/src/components/Stats.tsx b/frontend/src/components/Stats.tsx
index 62e631c..9318b02 100644
--- a/frontend/src/components/Stats.tsx
+++ b/frontend/src/components/Stats.tsx
@@ -1,5 +1,4 @@
-import React from 'react';
-import { CheckCircle, XCircle, DollarSign, Zap } from 'lucide-react';
+import { CheckCircle, XCircle, Zap,JapaneseYen } from 'lucide-react';
 import type { ApiKey } from '../types/api';
 
 interface StatsProps {
@@ -36,8 +35,8 @@ export function Stats({ apiKeys }: StatsProps) {
     },
     {
       name: '总余额',
-      value: `$${totalBalance.toFixed(2)}`,
-      icon: DollarSign,
+      value: `¥${totalBalance.toFixed(2)}`,
+      icon: JapaneseYen,
       color: 'text-blue-600',
       bgColor: 'bg-blue-50',
     },
diff --git a/src/services/apiKeyService.ts b/src/services/apiKeyService.ts
index 062d0a4..d135023 100644
--- a/src/services/apiKeyService.ts
+++ b/src/services/apiKeyService.ts
@@ -6,7 +6,7 @@ const prisma = new PrismaClient();
 export interface ApiKeyInput {
   name: string;
   key: string;
-  description?: string;
+  description?: string| null;
 }
 
 export interface ApiKeyWithValidation extends ApiKeyInput {
@@ -20,7 +20,7 @@ export interface ApiKeyWithValidation extends ApiKeyInput {
   } | null;
   lastChecked: Date;
   checkCount: number;
-  error?: string;
+  error?: string | undefined;
 }
 
 export class ApiKeyService {
@@ -44,7 +44,7 @@ export class ApiKeyService {
       ...apiKey,
 
       key: apiKey.key,  // 直接传输真实key
-      error: validation.error || undefined,
+      error: validation.error ,
       user: validation.user || null,
     };
   }