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/SalesOrder/actions/SendSaleOrderMailAjax.php

@@ -0,0 +1,63 @@
+<?php
+class SalesOrder_SendSaleOrderMailAjax_Action extends Vtiger_BasicAjax_Action
+{
+    public function process(Vtiger_Request $request)
+    {
+        $recordId = $request->get('record');
+        $response = new Vtiger_Response();
+
+        try {
+            // Get record model
+            $recordModel = Vtiger_Record_Model::getInstanceById($recordId, 'SalesOrder');
+
+            // Load Outgoing Server config
+            $outgoingServerSettingsModel = Settings_Vtiger_Systems_Model::getInstanceFromServerType('email', 'OutgoingServer');
+
+            // Include mailer
+            require_once 'vtlib/Vtiger/Mailer.php';
+            $mailer = new Vtiger_Mailer();
+
+            $mailer->IsSMTP();
+            $mailer->Host = $outgoingServerSettingsModel->get('server');
+            $mailer->Port = 587;
+            $mailer->SMTPAuth = $outgoingServerSettingsModel->isSmtpAuthEnabled();
+            $mailer->Username = $outgoingServerSettingsModel->get('server_username');
+            $mailer->Password = $outgoingServerSettingsModel->get('server_password');
+            $mailer->SMTPSecure = 'tls';
+            $mailer->From = $outgoingServerSettingsModel->get('from_email_field');
+            $mailer->FromName = 'Vtiger CRM';
+            $mailer->AddAddress('souldibachir3150@gmail.com');
+            $mailer->Subject = 'Sales Order #' . $recordModel->get('salesorder_no');
+
+            $mailer->Body = 'Attached is your Sales Order from Vtiger CRM.';
+
+            // Attach PDF
+            $pdfPath = 'storage/SalesOrder_' . $recordId . '.pdf';
+            $this->generatePDF($recordId, $pdfPath);
+            $mailer->AddAttachment($pdfPath);
+
+            // Force send immediately
+            $sent = $mailer->Send(true);
+
+            if ($sent) {
+                $response->setResult(['success' => true, 'message' => '✅ Sales Order email sent successfully!']);
+            } else {
+                $response->setResult(['success' => false, 'message' => '⚠️ Failed to send Sales Order email.']);
+            }
+
+        } catch (Exception $e) {
+            $response->setError($e->getCode(), $e->getMessage());
+        }
+
+        $response->emit();
+    }
+
+    private function generatePDF($recordId, $pdfPath)
+    {
+        require_once 'modules/SalesOrder/SalesOrderPDFController.php';
+        $pdfController = new Vtiger_SalesOrderPDFController('SalesOrder');
+        $pdfController->loadRecord($recordId);
+        $pdfContent = $pdfController->Output('', 'S'); // Output as string
+        file_put_contents($pdfPath, $pdfContent);
+    }
+}