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.

test/templates_c/v7/b307425d1b338e6a92e5cdf7e1d4fa12929b2d14.file.Multireference.tpl.php

@@ -1,4 +1,4 @@
-<?php /* Smarty version Smarty-3.1.7, created on 2025-09-27 18:02:08
+<?php /* Smarty version Smarty-3.1.7, created on 2025-10-15 15:23:42
          compiled from "C:\xampp\htdocs\sophalcrm\includes\runtime/../../layouts/v7\modules\Events\uitypes\Multireference.tpl" */ ?>
 <?php /*%%SmartyHeaderCode:157938834968d826a00c4717-78770212%%*/if(!defined('SMARTY_DIR')) exit('no direct access allowed');
 $_valid = $_smarty_tpl->decodeProperties(array (
@@ -7,7 +7,7 @@ $_valid = $_smarty_tpl->decodeProperties(array (
     'b307425d1b338e6a92e5cdf7e1d4fa12929b2d14' => 
     array (
       0 => 'C:\\xampp\\htdocs\\sophalcrm\\includes\\runtime/../../layouts/v7\\modules\\Events\\uitypes\\Multireference.tpl',
-      1 => 1758796609,
+      1 => 1759105402,
       2 => 'file',
     ),
   ),
@@ -15,6 +15,8 @@ $_valid = $_smarty_tpl->decodeProperties(array (
   'function' => 
   array (
   ),
+  'version' => 'Smarty-3.1.7',
+  'unifunc' => 'content_68d826a01474f',
   'variables' => 
   array (
     'FIELD_MODEL' => 0,
@@ -30,8 +32,6 @@ $_valid = $_smarty_tpl->decodeProperties(array (
     'RELATED_CONTACTS' => 0,
   ),
   'has_nocache_code' => false,
-  'version' => 'Smarty-3.1.7',
-  'unifunc' => 'content_68d826a01474f',
 ),false); /*/%%SmartyHeaderCode%%*/?>
 <?php if ($_valid && !is_callable('content_68d826a01474f')) {function content_68d826a01474f($_smarty_tpl) {?>