Reorganize event processors and update routing

- Move process_event.php from src/admin to src/processors
- Move toggle_event_published.php from src/admin to src/processors
- Move delete_event.php from src/admin to src/processors
- Update .htaccess rewrite rules to point event processors to correct location
- Keep admin_events.php and manage_events.php in admin (display pages only)

src/logs/db_errors.log

@@ -0,0 +1 @@
+Database Connection Error: No such file or directoryDatabase Connection Error: No such file or directoryDatabase Connection Error: No such file or directory

src/processors/process_event.php

@@ -1,6 +1,11 @@
 <?php
 $rootPath = dirname(dirname(__DIR__));
-include_once($rootPath . '/header.php');
+require_once($rootPath . "/src/config/env.php");
+require_once($rootPath . "/src/config/session.php");
+require_once($rootPath . "/src/config/connection.php");
+require_once($rootPath . "/src/config/functions.php");
+// session_start();
+
 checkAdmin();
 
 header('Content-Type: application/json');
@@ -49,7 +54,7 @@ if ($_GET['action'] ?? null === 'delete') {
 }
 
 // Check CSRF token
-if (!isset($_POST['csrf_token']) || !verifyCsrfToken($_POST['csrf_token'])) {
+if (!isset($_POST['csrf_token']) || !validateCSRFToken($_POST['csrf_token'])) {
     echo json_encode(['status' => 'error', 'message' => 'CSRF token validation failed']);
     exit;
 }
@@ -79,7 +84,9 @@ if (!empty($_FILES['image']['name'])) {
     
     $file_name = uniqid() . '_' . basename($_FILES['image']['name']);
     $target_file = $upload_dir . $file_name;
-    $file_type = mime_content_type($_FILES['image']['tmp_name']);
+    $finfo = finfo_open(FILEINFO_MIME_TYPE);
+    $file_type = finfo_file($finfo, $_FILES['image']['tmp_name']);
+    finfo_close($finfo);
     
     // Validate image file
     $allowed_types = ['image/jpeg', 'image/png', 'image/gif', 'image/webp'];
@@ -109,7 +116,9 @@ if (!empty($_FILES['promo']['name'])) {
     
     $file_name = uniqid() . '_promo_' . basename($_FILES['promo']['name']);
     $target_file = $upload_dir . $file_name;
-    $file_type = mime_content_type($_FILES['promo']['tmp_name']);
+    $finfo = finfo_open(FILEINFO_MIME_TYPE);
+    $file_type = finfo_file($finfo, $_FILES['promo']['tmp_name']);
+    finfo_close($finfo);
     
     // Validate image file
     $allowed_types = ['image/jpeg', 'image/png', 'image/gif', 'image/webp'];