Enhance Proxmox components with input validation, error handling, and UI improvements

extensions/Servers/Proxmox/Livewire/Statistics.php

@@ -858,6 +858,12 @@ class Statistics extends Component
 
     protected function fetchGraphData(string $graphType, string $timeRange, string $aggregation, bool $forceRefresh = false): void
     {
+        $allowedRanges = ['hour', 'day', 'week', 'month', 'year'];
+        $allowedAggs = ['average', 'maximum'];
+        if (!in_array($timeRange, $allowedRanges, true) || !in_array($aggregation, $allowedAggs, true)) {
+            return;
+        }
+
         $cacheKey = 'proxmox-stats-' . $this->server->id . '-' . $graphType . '-' . $timeRange . '-' . $aggregation;
 
         try {