Fix public client IP extraction and hide duplicate footer creation date

- Enhance RequestLogger::getClientIp() with 2-pass detection prioritizing public IPs over proxy/internal IPs
- Hide footer creation date when identical to modification date to prevent duplicate date display
- Improve AdminAuth log helper and footer template tooltips

cms/core/class/CodePressCMS.php

@@ -478,9 +478,13 @@ class CodePressCMS {
             $created = date('d-m-Y H:i', $createdTimestamp);
         }
         
+        // Show created date only if it is distinctly different from modified date
+        $showCreated = ($created !== $modified);
+        
         return [
             'created' => $created,
             'modified' => $modified,
+            'show_created' => $showCreated,
             'size' => $this->formatFileSize($stats['size'])
         ];
     }
@@ -1151,10 +1155,12 @@ class CodePressCMS {
         if (isset($page['file_info'])) {
             $templateData['created'] = htmlspecialchars($page['file_info']['created']);
             $templateData['modified'] = htmlspecialchars($page['file_info']['modified']);
+            $templateData['show_created'] = !empty($page['file_info']['show_created']);
             $templateData['file_info_block'] = true;
         } else {
             $templateData['created'] = '';
             $templateData['modified'] = '';
+            $templateData['show_created'] = false;
             $templateData['file_info_block'] = false;
         }