Fix newest homepage detection, file creation dates, real IP, and request log visitor type

- Fix detectNewestPage() to search subdirectories recursively and handle language prefixes
- Fix getFileInfo() to preserve frontmatter created date or ctime instead of overwriting with mtime
- Automatically store created date in frontmatter when creating/editing files
- Add RequestLogger::getClientIp() with proxy and Cloudflare header support
- Replace domain column in request log with visitor/bot type badges (Human, AI, Search, Scraper)
- Update 'Activiteitenlog' to 'Activiteiten log' in UI and guide

admin/src/AdminAuth.php

@@ -304,7 +304,14 @@ class AdminAuth
             mkdir($dir, 0755, true);
         }
         $timestamp = date('Y-m-d H:i:s');
-        $ip = $_SERVER['REMOTE_ADDR'] ?? 'cli';
+        if (class_exists('RequestLogger')) {
+            $ip = RequestLogger::getClientIp();
+        } else {
+            $ip = $_SERVER['HTTP_CF_CONNECTING_IP'] ?? $_SERVER['HTTP_X_REAL_IP'] ?? $_SERVER['HTTP_X_FORWARDED_FOR'] ?? $_SERVER['REMOTE_ADDR'] ?? 'cli';
+            if (($commaPos = strpos($ip, ',')) !== false) {
+                $ip = trim(substr($ip, 0, $commaPos));
+            }
+        }
         file_put_contents($logFile, "[{$timestamp}] [{$level}] [{$ip}] {$message}\n", FILE_APPEND);
     }
 }