extract keyboard module with macOS and Windows support

surfsense_desktop/src/modules/keyboard.ts

@@ -0,0 +1,33 @@
+import { execSync } from 'child_process';
+import { systemPreferences } from 'electron';
+
+export function getFrontmostApp(): string {
+  try {
+    if (process.platform === 'darwin') {
+      return execSync(
+        'osascript -e \'tell application "System Events" to get name of first application process whose frontmost is true\''
+      ).toString().trim();
+    }
+    if (process.platform === 'win32') {
+      return execSync(
+        'powershell -command "Add-Type \'using System; using System.Runtime.InteropServices; public class W { [DllImport(\\\"user32.dll\\\")] public static extern IntPtr GetForegroundWindow(); }\'; (Get-Process | Where-Object { $_.MainWindowHandle -eq [W]::GetForegroundWindow() }).ProcessName"'
+      ).toString().trim();
+    }
+  } catch {
+    return '';
+  }
+  return '';
+}
+
+export function simulatePaste(): void {
+  if (process.platform === 'darwin') {
+    execSync('osascript -e \'tell application "System Events" to keystroke "v" using command down\'');
+  } else if (process.platform === 'win32') {
+    execSync('powershell -command "Add-Type -AssemblyName System.Windows.Forms; [System.Windows.Forms.SendKeys]::SendWait(\'^v\')"');
+  }
+}
+
+export function checkAccessibilityPermission(): boolean {
+  if (process.platform !== 'darwin') return true;
+  return systemPreferences.isTrustedAccessibilityClient(true);
+}