Fix compile errors; adopt plugin ID com.prepeep.harmness-browser and official Gradle wrapper; build success

src/main/kotlin/com/harmness/toolwindow/HarmnessBrowserPanel.kt

@@ -16,6 +16,7 @@ import org.cef.handler.CefLoadHandlerAdapter
 import java.awt.BorderLayout
 import java.awt.Desktop
 import java.awt.FlowLayout
+import java.awt.event.ActionEvent
 import javax.swing.AbstractAction
 import javax.swing.JButton
 import javax.swing.JComponent
@@ -56,22 +57,21 @@ class HarmnessBrowserPanel(
                 "JCEF (Java Chromium Embedded Framework) is not supported in this IDE instance.\n" +
                     "Please use an IDE build that bundles JCEF, or a compatible JDK.", 0),
                 BorderLayout.CENTER)
-            return
+        } else {
+            browser = JBCefBrowser()
+
+            // 布局：顶部工具栏 + 浏览器
+            add(createToolbar(), BorderLayout.NORTH)
+            add(browser.component, BorderLayout.CENTER)
+
+            // 设置弹窗处理
+            setupPopupHandling()
+            // 设置 JS 桥
+            setupBridge()
+
+            // 初始加载
+            loadCurrentUrl()
         }
-
-        browser = JBCefBrowser()
-
-        // 布局：顶部工具栏 + 浏览器
-        add(createToolbar(), BorderLayout.NORTH)
-        add(browser.component, BorderLayout.CENTER)
-
-        // 设置弹窗处理
-        setupPopupHandling()
-        // 设置 JS 桥
-        setupBridge()
-
-        // 初始加载
-        loadCurrentUrl()
     }
 
     // ------------------------------------------------------------------
@@ -81,15 +81,25 @@ class HarmnessBrowserPanel(
     private fun createToolbar(): JComponent {
         val cefBrowser = browser.cefBrowser
 
-        val back = JButton(AbstractAction("←") {
-            if (cefBrowser.canGoBack()) cefBrowser.goBack()
+        val back = JButton(object : AbstractAction("←") {
+            override fun actionPerformed(e: ActionEvent) {
+                if (cefBrowser.canGoBack()) cefBrowser.goBack()
+            }
         })
-        val forward = JButton(AbstractAction("→") {
-            if (cefBrowser.canGoForward()) cefBrowser.goForward()
+        val forward = JButton(object : AbstractAction("→") {
+            override fun actionPerformed(e: ActionEvent) {
+                if (cefBrowser.canGoForward()) cefBrowser.goForward()
+            }
+        })
+        val reload = JButton(object : AbstractAction("⟳") {
+            override fun actionPerformed(e: ActionEvent) { cefBrowser.reload() }
+        })
+        val settingsBtn = JButton(object : AbstractAction("⚙") {
+            override fun actionPerformed(e: ActionEvent) { openSettings() }
+        })
+        val externalBtn = JButton(object : AbstractAction("⧉") {
+            override fun actionPerformed(e: ActionEvent) { openInExternalBrowser() }
         })
-        val reload = JButton(AbstractAction("⟳") { cefBrowser.reload() })
-        val settingsBtn = JButton(AbstractAction("⚙") { openSettings() })
-        val externalBtn = JButton(AbstractAction("⧉") { openInExternalBrowser() })
 
         addressField = JTextField(settings.startUrl)
         addressField.toolTipText = "当前页面地址（可手动输入后回车跳转）"