fix: 修复新建项目无响应问题

- 替换 prompt() 为 InputDialog Vue 模态组件
- 替换 alert()/confirm() 为 Electron showMessageBox IPC
- 添加 dialog:showMessage / dialog:showConfirm IPC 通道

electron/preload.js

@@ -5,7 +5,9 @@ contextBridge.exposeInMainWorld('api', {
     selectDirectory: () => ipcRenderer.invoke('dialog:selectDirectory'),
     selectFile: (options) => ipcRenderer.invoke('dialog:selectFile', options),
     selectIcon: () => ipcRenderer.invoke('dialog:selectIcon'),
-    saveFile: (options) => ipcRenderer.invoke('dialog:saveFile', options)
+    saveFile: (options) => ipcRenderer.invoke('dialog:saveFile', options),
+    showMessage: (options) => ipcRenderer.invoke('dialog:showMessage', options),
+    showConfirm: (options) => ipcRenderer.invoke('dialog:showConfirm', options)
   },
   dir: {
     readTree: (dirPath) => ipcRenderer.invoke('dir:readTree', dirPath)