feat: Implement invoice generation and emailing functionality

- Added invoice generation logic using DomPDF.
- Integrated invoice data retrieval from the API.
- Implemented language determination for invoices based on customer data.
- Added options to email invoices to customers and admin.
- Included HTML output option for direct viewing in the browser.
- Ensured proper redirection and error handling throughout the process.

history_manage.php

@@ -34,10 +34,10 @@ if ($rowID !=''){
 if (isset($_GET['rowID'])) {
     // ID param exists, edit an existing product
     //CALL TO API
-    $api_url = '/v1/history/historyid='.$rowID;
+    $api_url = '/v2/history/historyid='.$rowID;
     $responses = ioServer($api_url,'');
     //Decode Payload
-    if (!empty($responses)){$responses = decode_payload($responses);}else{$responses = null;}
+    if (!empty($responses)){$responses = json_decode($responses);}else{$responses = null;}
     
     $history = json_decode(json_encode($responses[0]), true);