feat: Enhance email functionality and PDF generation for Sales Orders

- Enabled SMTP debugging in PHPMailer for better error tracking.
- Added a "Test send email" link in the Inventory Detail View for quick email testing.
- Implemented automatic PDF generation and email sending upon Sales Order creation.
- Created a new action for sending Sales Order emails with attached PDFs.
- Added a new AJAX action for testing outgoing email server configurations.
- Updated outgoing server settings to use new SMTP credentials.
- Improved email templates for better user experience.
- Added test scripts for validating PDF generation and email sending.

modules/Settings/Vtiger/actions/OutgoingServerAjax.php

@@ -0,0 +1,74 @@
+<?php
+/*+***********************************************************************************
+ * Custom Action for Outgoing Server Test Mail
+ *************************************************************************************/
+
+class Settings_Vtiger_OutgoingServerAjax_Action extends Settings_Vtiger_Basic_Action
+{
+    public function process(Vtiger_Request $request)
+    {
+        $outgoingServerSettingsModel = Settings_Vtiger_Systems_Model::getInstanceFromServerType('email', 'OutgoingServer');
+        $response = new Vtiger_Response();
+
+        try {
+            // Always send test mail
+            $sent = $this->sendTestMail($outgoingServerSettingsModel);
+
+            if ($sent) {
+
+                $data = $outgoingServerSettingsModel->getData();
+                $data['message'] = '✅ Configuration saved and test mail sent successfully.';
+                $data['success'] = true;
+                $response->setResult($data);
+            } else {
+                $response->setResult([
+                    'success' => false,
+                    'message' => '⚠️ Test mail failed to send. Check SMTP settings or logs.'
+                ]);
+            }
+        } catch (Exception $e) {
+            $response->setError($e->getCode(), $e->getMessage());
+        }
+
+        // Important: emit and stop ALL further output
+        $response->emit();
+        exit; // 🔹 This prevents extra output after JSON
+    }
+
+  public function sendTestMail($model , $subject = null, $body  = null,$pdf_path = null)
+{
+    require_once 'vtlib/Vtiger/Mailer.php';
+    $mailer = new Vtiger_Mailer();
+
+    try {
+        $mailer->IsSMTP();
+        $mailer->Host = $model->get('server');
+        $mailer->Port = 587;
+        $mailer->SMTPAuth = $model->isSmtpAuthEnabled();
+        $mailer->Username = $model->get('server_username');
+        $mailer->Password = $model->get('server_password');
+        $mailer->SMTPSecure = 'tls';
+        $mailer->From = $model->get('from_email_field');
+        $mailer->FromName = 'Vtiger Test Mail';
+        $mailer->AddAddress($model->to_email ?? 'souldibachir3150@gmail.com');
+        $mailer->AddCC('andryamo2231@gmail.com');
+        $mailer->Subject = $subject ?? 'Test Mail from Vtiger CRM 2';
+        $mailer->IsHTML(true);
+        $mailer->Body = $body ?? 'This is a test mail sent when saving outgoing server configuration. 2'.$pdf_path;
+        // // Attach Sales Order PDF if available
+        // if (!empty($model->pdf_path) && file_exists($model->pdf_path)) {
+        //     $mailer->AddAttachment($model->pdf_path, basename($model->pdf_path));
+        // }
+        if (!$mailer->Send(true)) {
+            error_log('SMTP send() failed: ' . $mailer->ErrorInfo);
+            return false;
+        }
+
+        return true;
+    } catch (Exception $e) {
+        error_log('SMTP Test Mail Error: ' . $e->getMessage());
+        return false;
+    }
+}
+
+}