feat: 添加公告功能，支持查看公告和在系统浏览器中打开链接

frontend/electron/main.ts

@@ -1,4 +1,4 @@
-import { app, BrowserWindow, ipcMain, dialog } from 'electron'
+import { app, BrowserWindow, ipcMain, dialog, shell } from 'electron'
 import * as path from 'path'
 import * as fs from 'fs'
 import { spawn } from 'child_process'
@@ -74,7 +74,6 @@ function createWindow() {
   })
 
   mainWindow.setMenuBarVisibility(false)
-
   const devServer = process.env.VITE_DEV_SERVER_URL
   if (devServer) {
     mainWindow.loadURL(devServer)
@@ -121,6 +120,17 @@ ipcMain.handle('select-file', async (event, filters = []) => {
   return result.canceled ? null : result.filePaths[0]
 })
 
+// 在系统默认浏览器中打开URL
+ipcMain.handle('open-url', async (event, url: string) => {
+  try {
+    await shell.openExternal(url)
+    return { success: true }
+  } catch (error) {
+    console.error('打开链接失败:', error)
+    return { success: false, error: error.message }
+  }
+})
+
 // 环境检查
 ipcMain.handle('check-environment', async () => {
   const appRoot = getAppRoot()