- Add detailed HTTP error handling in web.config

- Update comments in `Server-Detail.php` to reflect current tools
- Introduce AIX/Linux backup details in `Server-Detail.php`
- Add `/X/inventory.php` for AIX/Linux server inventory display functionality
- Update `navbar.html` to include link to the new server inventory page

web.config

@@ -11,5 +11,6 @@
                 <add accessType="Allow" roles="web-infra-reports" />
             </authorization>
         </security>
+        <httpErrors errorMode="Detailed" existingResponse="PassThrough" />
     </system.webServer>
 </configuration>