Switch to native Electron context menu

Replaces the custom HTML context menu with a native Electron menu for webview and window areas. Adds context menu handling in main and preload scripts, relays commands to renderer, and updates renderer logic to support new menu actions. Improves integration and user experience by leveraging platform-native menus.

main.js

@@ -1,4 +1,4 @@
-const { app, BrowserWindow, ipcMain, session, screen, shell, dialog } = require('electron');
+const { app, BrowserWindow, ipcMain, session, screen, shell, dialog, Menu, clipboard } = require('electron');
 const { pathToFileURL } = require('url');
 const fs = require('fs');
 const path = require('path');
@@ -612,3 +612,79 @@ ipcMain.handle('show-open-file-dialog', async () => {
     return null;
   }
 });
+
+// Helper to build and show a native context menu for a given webContents + params
+function buildAndShowContextMenu(sender, params = {}) {
+  try {
+    const embedder = sender.hostWebContents || sender;
+    const template = [];
+
+    template.push(
+      { label: 'Back', enabled: sender.canGoBack?.(), click: () => { try { sender.goBack(); } catch {} } },
+      { label: 'Forward', enabled: sender.canGoForward?.(), click: () => { try { sender.goForward(); } catch {} } },
+      { label: 'Reload', click: () => { try { sender.reload(); } catch {} } },
+      { type: 'separator' }
+    );
+
+    // Link actions
+    const linkURL = params.linkURL && params.linkURL.startsWith('http') ? params.linkURL : undefined;
+    if (linkURL) {
+      template.push(
+        { label: 'Open Link in New Tab', click: () => embedder.send('context-menu-command', { cmd: 'open-link-new-tab', url: linkURL }) },
+        { label: 'Open Link Externally', click: () => shell.openExternal(linkURL).catch(()=>{}) },
+        { label: 'Copy Link Address', click: () => clipboard.writeText(linkURL) },
+        { type: 'separator' }
+      );
+    }
+
+    // Image actions
+    const imageURL = (params.mediaType === 'image' && params.srcURL) ? params.srcURL : (params.imgURL || undefined);
+    if (imageURL) {
+      template.push(
+        { label: 'Open Image in New Tab', click: () => embedder.send('context-menu-command', { cmd: 'open-image-new-tab', url: imageURL }) },
+        { label: 'Copy Image Address', click: () => clipboard.writeText(imageURL) },
+        { type: 'separator' }
+      );
+    }
+
+    // Text / editable
+    if (params.isEditable) {
+      template.push(
+        { label: 'Undo', role: 'undo' },
+        { label: 'Redo', role: 'redo' },
+        { type: 'separator' },
+        { label: 'Cut', role: 'cut' },
+        { label: 'Copy', role: 'copy' },
+        { label: 'Paste', role: 'paste' },
+        { label: 'Select All', role: 'selectAll' },
+        { type: 'separator' }
+      );
+    } else if (params.selectionText) {
+      template.push(
+        { label: 'Copy', role: 'copy' },
+        { label: 'Select All', role: 'selectAll' },
+        { type: 'separator' }
+      );
+    }
+
+    template.push({ label: 'Inspect Element', click: () => { try { sender.inspectElement(params.x ?? params.clientX, params.y ?? params.clientY); } catch {} } });
+
+    const menu = Menu.buildFromTemplate(template);
+    const win = BrowserWindow.fromWebContents(embedder);
+    if (win) menu.popup({ window: win });
+  } catch (err) {
+    console.error('Failed to build context menu:', err);
+  }
+}
+
+// IPC trigger (legacy / renderer-requested)
+ipcMain.handle('show-context-menu', (event, params = {}) => {
+  buildAndShowContextMenu(event.sender, params);
+});
+
+// Automatic native context menu for any webContents (windows + webviews)
+app.on('web-contents-created', (event, contents) => {
+  contents.on('context-menu', (e, params) => {
+    buildAndShowContextMenu(contents, params);
+  });
+});