简化界面：删除导入当前配置功能

- 移除 ImportConfigModal 组件及相关文件
- 删除头部的导入当前配置按钮
- 移除 importCurrentConfig 相关的 API 和 IPC 处理器
- 保留 importCurrentConfigAsDefault 功能用于首次启动
- 界面更简洁，专注核心功能：添加、编辑、切换、删除供应商
- 减少用户困惑，因为自动创建的默认供应商已经满足大部分需求

src/renderer/App.tsx

@@ -3,7 +3,6 @@ import { Provider } from "../shared/types";
 import ProviderList from "./components/ProviderList";
 import AddProviderModal from "./components/AddProviderModal";
 import EditProviderModal from "./components/EditProviderModal";
-import ImportConfigModal from "./components/ImportConfigModal";
 import { ConfirmDialog } from "./components/ConfirmDialog";
 import "./App.css";
 
@@ -11,7 +10,6 @@ function App() {
   const [providers, setProviders] = useState<Record<string, Provider>>({});
   const [currentProviderId, setCurrentProviderId] = useState<string>("");
   const [isAddModalOpen, setIsAddModalOpen] = useState(false);
-  const [isImportModalOpen, setIsImportModalOpen] = useState(false);
   const [configPath, setConfigPath] = useState<string>("");
   const [editingProviderId, setEditingProviderId] = useState<string | null>(
     null
@@ -146,23 +144,6 @@ function App() {
     }
   };
 
-  const handleImportCurrentConfig = async (name: string) => {
-    try {
-      const result = await window.electronAPI.importCurrentConfig(name)
-      
-      if (result.success) {
-        await loadProviders()
-        setIsImportModalOpen(false)
-        showNotification(`成功导入当前配置为供应商: ${name}`, "success", 3000)
-      } else {
-        showNotification("导入失败，请检查当前是否有有效的配置文件", "error")
-      }
-    } catch (error) {
-      console.error('导入配置失败:', error)
-      showNotification("导入配置时发生错误", "error")
-    }
-  }
-
   // 自动导入现有配置为"默认"供应商
   const handleAutoImportDefault = async () => {
     try {
@@ -191,9 +172,6 @@ function App() {
       <header className="app-header">
         <h1>Claude Code 供应商切换器</h1>
         <div className="header-actions">
-          <button className="import-btn" onClick={() => setIsImportModalOpen(true)}>
-            导入当前配置
-          </button>
           <button className="add-btn" onClick={() => setIsAddModalOpen(true)}>
             添加供应商
           </button>
@@ -245,13 +223,6 @@ function App() {
         />
       )}
 
-      {isImportModalOpen && (
-        <ImportConfigModal
-          onImport={handleImportCurrentConfig}
-          onClose={() => setIsImportModalOpen(false)}
-        />
-      )}
-
       {editingProviderId && providers[editingProviderId] && (
         <EditProviderModal
           provider={providers[editingProviderId]}