fix: Replace Desktop util with built-in BrowserUtil (fixes #6020)

Author: exigow

extensions/intellij/src/main/kotlin/com/github/continuedev/continueintellijextension/auth/ContinueAuthService.kt

@@ -2,9 +2,9 @@ package com.github.continuedev.continueintellijextension.auth
 
 import com.github.continuedev.continueintellijextension.services.ContinueExtensionSettings
 import com.github.continuedev.continueintellijextension.services.ContinuePluginService
-import com.github.continuedev.continueintellijextension.utils.Desktop
 import com.google.gson.Gson
 import com.intellij.credentialStore.Credentials
+import com.intellij.ide.BrowserUtil
 import com.intellij.ide.passwordSafe.PasswordSafe
 import com.intellij.ide.util.PropertiesComponent
 import com.intellij.openapi.application.ApplicationManager
@@ -165,7 +165,7 @@ class ContinueAuthService {
 
         // Still open the URL in the browser (keeping existing behavior)
         if (authUrl != null) {
-            Desktop.browse(java.net.URI(authUrl))
+            BrowserUtil.open(authUrl!!)
         }
 
         return authUrl

extensions/intellij/src/main/kotlin/com/github/continuedev/continueintellijextension/continue/IntelliJIde.kt

@@ -10,6 +10,7 @@ import com.github.continuedev.continueintellijextension.utils.*
 import com.intellij.codeInsight.daemon.impl.HighlightInfo
 import com.intellij.execution.configurations.GeneralCommandLine
 import com.intellij.execution.util.ExecUtil
+import com.intellij.ide.BrowserUtil
 import com.intellij.ide.plugins.PluginManager
 import com.intellij.ide.plugins.PluginManagerCore
 import com.intellij.lang.annotation.HighlightSeverity
@@ -211,7 +212,7 @@ class IntelliJIDE(
 
     override suspend fun openUrl(url: String) {
         withContext(Dispatchers.IO) {
-            Desktop.browse(URI(url))
+            BrowserUtil.browse(url)
         }
     }