feat: update package.json dependencies and enhance webview handling

- Removed the outdated @electron-toolkit/preload dependency and re-added it with the correct version.
- Added a new event listener in WindowService to set the preload script for webviews.
- Updated the openExternal method in preload to handle potential null values.
- Enabled node integration for webviews in the MinApp component for improved functionality.

src/preload/index.ts

@@ -118,7 +118,7 @@ const api = {
     cleanup: () => ipcRenderer.invoke('mcp:cleanup')
   },
   shell: {
-    openExternal: shell.openExternal
+    openExternal: shell?.openExternal
   },
 
   // Binary related APIs