mescole update

public/userarea/save_supplier.php

@@ -0,0 +1,19 @@
+<?php
+include('include/headscript.php');
+header('Content-Type: application/json');
+
+$supplier_name = trim($_POST['supplier_name'] ?? '');
+$vat = trim($_POST['vat'] ?? '');
+
+if ($supplier_name === '') {
+  echo json_encode(['success' => false, 'message' => 'Supplier name required']);
+  exit;
+}
+
+$db = DBHandlerSelect::getInstance();
+$pdo = $db->getConnection();
+
+$stmt = $pdo->prepare("INSERT INTO suppliers (supplier_name, vat) VALUES (?, ?)");
+$ok = $stmt->execute([$supplier_name, $vat !== '' ? $vat : null]);
+
+echo json_encode(['success' => (bool)$ok]);