Remove test.php and enhance null safety and sorting across components

- Deleted `test.php` as it was no longer in use.
- Enhanced null safety checks in `Inventory.php`, `StdOut-detail.php`, `Backups.php`, and `SwitchsSAN.php` to prevent potential warnings.
- Refactored `SwitchsSAN.php` to improve sorting logic for ports based on errors, vFabric, and Port ID.
- Added seasonal snow effect script in `all.php` with toggle functionality for user engagement.
- Updated navigation bar (`navbar.html`) to include a new VIO page link.
- Introduced a new `VIO.php` page to display VIO monitoring details with table export and sorting features.

X/Inventory.php

@@ -179,11 +179,11 @@
 
                 //LastBackup
                 $lr = explode(".", $s['backuplast'] ?? "")[0];
-                if(str_contains(strtolower($s['backuplog']), 'progress')){
+                if(str_contains(strtolower($s['backuplog'] ?? ''), 'progress')){
                   $size = "<span class='text-warning'>In Progress</span>";
-                }elseif (str_contains(strtolower($s['backuplog']), 'waiting')){
+                }elseif (str_contains(strtolower($s['backuplog'] ?? ''), 'waiting')){
                   $size = "<span class='text-warning'><br>".$s['backuplog']."</span>";
-                }elseif (str_contains(strtolower($s['backuplog']), 'error')){
+                }elseif (str_contains(strtolower($s['backuplog'] ?? ''), 'error')){
                   $size = "<span class='text-danger'><b> ERROR !!!</b></span>";
                 }else {
                   $size = 0;