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.

layouts/vlayout/modules/Inventory/resources/Detail.js

@@ -13,6 +13,42 @@ Vtiger_Detail_Js("Inventory_Detail_Js",{
         popupInstance.show(url,function(){}, app.vtranslate('JS_SEND_PDF_MAIL') );
     }
 
+},{
+    testSendEmailPDFClickHandler : function(url){
+     var params = {
+            module: 'Vtiger',
+            parent: 'Settings',
+            action: 'OutgoingServerAjax',
+            mode: 'sendTestMail'
+        };
+
+        app.helper.showProgress();
+
+        app.request.post({ data: params }).then(function (err, data) {
+			console.log("data",data);
+			console.log("err",err);
+
+
+            app.helper.hideProgress();
+            if (err === null) {
+                if (data && data.success) {
+                    app.helper.showSuccessNotification({
+                        message: data.message || '✅ Test mail sent successfully!'
+                    });
+                } else if (data && data.error) {
+                    app.helper.showErrorNotification({
+                        message: data.error.message || '❌ Mailer Error.'
+                    });
+                } else {
+                    app.helper.showErrorNotification({
+                        message: '❌ Unknown error. Check logs.'
+                    });
+                }
+            } else {
+                app.helper.showErrorNotification({ message: '❌ ' + err.message });
+            }
+        });    
+    }
 },{
     
     /**