diff --git a/src/renderer/App.tsx b/src/renderer/App.tsx
index cd75efb..843fc34 100644
--- a/src/renderer/App.tsx
+++ b/src/renderer/App.tsx
@@ -3,6 +3,8 @@ import { Provider } from '../shared/types'
 import ProviderList from './components/ProviderList'
 import AddProviderModal from './components/AddProviderModal'
 import EditProviderModal from './components/EditProviderModal'
+import ConfirmModal from './components/ConfirmModal'
+import MessageModal from './components/MessageModal'
 import './App.css'
 
 function App() {
@@ -11,6 +13,20 @@ function App() {
   const [isAddModalOpen, setIsAddModalOpen] = useState(false)
   const [configPath, setConfigPath] = useState<string>('')
   const [editingProviderId, setEditingProviderId] = useState<string | null>(null)
+  
+  // Modal states
+  const [confirmModal, setConfirmModal] = useState<{
+    show: boolean
+    title: string
+    message: string
+    onConfirm: () => void
+  } | null>(null)
+  const [messageModal, setMessageModal] = useState<{
+    show: boolean
+    title: string
+    message: string
+    type: 'success' | 'error' | 'info'
+  } | null>(null)
 
   // 加载供应商列表
   useEffect(() => {
@@ -43,19 +59,35 @@ function App() {
   }
 
   const handleDeleteProvider = async (id: string) => {
-    if (confirm('确定要删除这个供应商吗？')) {
-      await window.electronAPI.deleteProvider(id)
-      await loadProviders()
-    }
+    setConfirmModal({
+      show: true,
+      title: '删除供应商',
+      message: '确定要删除这个供应商吗？',
+      onConfirm: async () => {
+        await window.electronAPI.deleteProvider(id)
+        await loadProviders()
+        setConfirmModal(null)
+      }
+    })
   }
 
   const handleSwitchProvider = async (id: string) => {
     const success = await window.electronAPI.switchProvider(id)
     if (success) {
       setCurrentProviderId(id)
-      alert('切换成功！')
+      setMessageModal({
+        show: true,
+        title: '切换成功',
+        message: '供应商已成功切换！',
+        type: 'success'
+      })
     } else {
-      alert('切换失败，请检查配置')
+      setMessageModal({
+        show: true,
+        title: '切换失败',
+        message: '切换失败，请检查配置',
+        type: 'error'
+      })
     }
   }
 
@@ -64,10 +96,20 @@ function App() {
       await window.electronAPI.updateProvider(provider)
       await loadProviders()
       setEditingProviderId(null)
-      alert('保存成功！')
+      setMessageModal({
+        show: true,
+        title: '保存成功',
+        message: '供应商信息已更新！',
+        type: 'success'
+      })
     } catch (error) {
       console.error('更新供应商失败:', error)
-      alert('保存失败，请重试')
+      setMessageModal({
+        show: true,
+        title: '保存失败',
+        message: '保存失败，请重试',
+        type: 'error'
+      })
     }
   }
 
@@ -129,6 +171,24 @@ function App() {
           onClose={() => setEditingProviderId(null)}
         />
       )}
+
+      {confirmModal && (
+        <ConfirmModal
+          title={confirmModal.title}
+          message={confirmModal.message}
+          onConfirm={confirmModal.onConfirm}
+          onCancel={() => setConfirmModal(null)}
+        />
+      )}
+
+      {messageModal && (
+        <MessageModal
+          title={messageModal.title}
+          message={messageModal.message}
+          type={messageModal.type}
+          onClose={() => setMessageModal(null)}
+        />
+      )}
     </div>
   )
 }
diff --git a/src/renderer/components/AddProviderModal.tsx b/src/renderer/components/AddProviderModal.tsx
index 6d79af3..024a1de 100644
--- a/src/renderer/components/AddProviderModal.tsx
+++ b/src/renderer/components/AddProviderModal.tsx
@@ -5,21 +5,23 @@ import './AddProviderModal.css'
 interface AddProviderModalProps {
   onAdd: (provider: Omit<Provider, 'id'>) => void
   onClose: () => void
+  onError?: (message: string) => void
 }
 
-const AddProviderModal: React.FC<AddProviderModalProps> = ({ onAdd, onClose }) => {
+const AddProviderModal: React.FC<AddProviderModalProps> = ({ onAdd, onClose, onError }) => {
   const [formData, setFormData] = useState({
     name: '',
     apiUrl: '',
     apiKey: ''
   })
   const [showPassword, setShowPassword] = useState(false)
+  const [error, setError] = useState<string>('')
 
   const handleSubmit = (e: React.FormEvent) => {
     e.preventDefault()
     
     if (!formData.name || !formData.apiUrl || !formData.apiKey) {
-      alert('请填写所有必填字段')
+      setError('请填写所有必填字段')
       return
     }
 
@@ -75,6 +77,12 @@ const AddProviderModal: React.FC<AddProviderModalProps> = ({ onAdd, onClose }) =
         </div>
 
         <form onSubmit={handleSubmit}>
+          {error && (
+            <div style={{ color: 'red', marginBottom: '1rem', padding: '0.5rem', backgroundColor: '#ffe6e6', borderRadius: '4px' }}>
+              {error}
+            </div>
+          )}
+          
           <div className="form-group">
             <label htmlFor="name">供应商名称 *</label>
             <input
diff --git a/src/renderer/components/ConfirmModal.tsx b/src/renderer/components/ConfirmModal.tsx
new file mode 100644
index 0000000..c850742
--- /dev/null
+++ b/src/renderer/components/ConfirmModal.tsx
@@ -0,0 +1,40 @@
+import React from 'react'
+import './AddProviderModal.css'
+
+interface ConfirmModalProps {
+  title: string
+  message: string
+  confirmText?: string
+  cancelText?: string
+  onConfirm: () => void
+  onCancel: () => void
+}
+
+const ConfirmModal: React.FC<ConfirmModalProps> = ({
+  title,
+  message,
+  confirmText = '确定',
+  cancelText = '取消',
+  onConfirm,
+  onCancel
+}) => {
+  return (
+    <div className="modal-overlay" onClick={onCancel}>
+      <div className="modal-content" onClick={(e) => e.stopPropagation()}>
+        <h2>{title}</h2>
+        <p>{message}</p>
+        
+        <div className="form-actions">
+          <button type="button" className="cancel-btn" onClick={onCancel}>
+            {cancelText}
+          </button>
+          <button type="button" className="submit-btn" onClick={onConfirm}>
+            {confirmText}
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default ConfirmModal
\ No newline at end of file
diff --git a/src/renderer/components/EditProviderModal.tsx b/src/renderer/components/EditProviderModal.tsx
index 6ef0a9f..8822925 100644
--- a/src/renderer/components/EditProviderModal.tsx
+++ b/src/renderer/components/EditProviderModal.tsx
@@ -15,6 +15,7 @@ const EditProviderModal: React.FC<EditProviderModalProps> = ({ provider, onSave,
     apiKey: provider.apiKey
   })
   const [showPassword, setShowPassword] = useState(false)
+  const [error, setError] = useState<string>('')
 
   useEffect(() => {
     setFormData({
@@ -28,7 +29,7 @@ const EditProviderModal: React.FC<EditProviderModalProps> = ({ provider, onSave,
     e.preventDefault()
     
     if (!formData.name || !formData.apiUrl || !formData.apiKey) {
-      alert('请填写所有必填字段')
+      setError('请填写所有必填字段')
       return
     }
 
@@ -52,6 +53,12 @@ const EditProviderModal: React.FC<EditProviderModalProps> = ({ provider, onSave,
         <h2>编辑供应商</h2>
 
         <form onSubmit={handleSubmit}>
+          {error && (
+            <div style={{ color: 'red', marginBottom: '1rem', padding: '0.5rem', backgroundColor: '#ffe6e6', borderRadius: '4px' }}>
+              {error}
+            </div>
+          )}
+          
           <div className="form-group">
             <label htmlFor="name">供应商名称 *</label>
             <input
diff --git a/src/renderer/components/MessageModal.tsx b/src/renderer/components/MessageModal.tsx
new file mode 100644
index 0000000..6890613
--- /dev/null
+++ b/src/renderer/components/MessageModal.tsx
@@ -0,0 +1,44 @@
+import React from 'react'
+import './AddProviderModal.css'
+
+interface MessageModalProps {
+  title: string
+  message: string
+  type?: 'success' | 'error' | 'info'
+  onClose: () => void
+}
+
+const MessageModal: React.FC<MessageModalProps> = ({
+  title,
+  message,
+  type = 'info',
+  onClose
+}) => {
+  const getIcon = () => {
+    switch (type) {
+      case 'success':
+        return '✅'
+      case 'error':
+        return '❌'
+      default:
+        return 'ℹ️'
+    }
+  }
+
+  return (
+    <div className="modal-overlay" onClick={onClose}>
+      <div className="modal-content" onClick={(e) => e.stopPropagation()}>
+        <h2>{getIcon()} {title}</h2>
+        <p>{message}</p>
+        
+        <div className="form-actions">
+          <button type="button" className="submit-btn" onClick={onClose}>
+            确定
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default MessageModal
\ No newline at end of file