feat(proxy-dashboard): implement ProxyDashboardCacheService to manage Traefik dashboard cache; clear cache on configuration changes and proxy actions

app/Services/ProxyDashboardCacheService.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\Server;
+use Illuminate\Support\Facades\Cache;
+
+class ProxyDashboardCacheService
+{
+    /**
+     * Get Redis cache key for Traefik dashboard availability
+     */
+    public static function getCacheKey(Server $server): string
+    {
+        return "server:{$server->id}:traefik:dashboard_available";
+    }
+
+    /**
+     * Check if Traefik dashboard is available (from cache or compute)
+     */
+    public static function isTraefikDashboardAvailable(Server $server): bool
+    {
+        $cacheKey = static::getCacheKey($server);
+
+        // Try to get from cache first
+        $cachedValue = Cache::get($cacheKey);
+
+        if ($cachedValue !== null) {
+            return $cachedValue;
+        }
+
+        // If not in cache, compute the value
+        try {
+            $proxy_settings = \App\Actions\Proxy\CheckConfiguration::run($server);
+            $dashboardAvailable = str($proxy_settings)->contains('--api.dashboard=true') &&
+                                str($proxy_settings)->contains('--api.insecure=true');
+
+            // Cache the result (cache indefinitely until proxy restart)
+            Cache::forever($cacheKey, $dashboardAvailable);
+
+            return $dashboardAvailable;
+        } catch (\Throwable $e) {
+            // If there's an error checking configuration, default to false and don't cache
+            return false;
+        }
+    }
+
+    /**
+     * Clear Traefik dashboard cache for a server
+     */
+    public static function clearCache(Server $server): void
+    {
+        $cacheKey = static::getCacheKey($server);
+        Cache::forget($cacheKey);
+    }
+
+    /**
+     * Clear Traefik dashboard cache for multiple servers
+     */
+    public static function clearCacheForServers(array $serverIds): void
+    {
+        foreach ($serverIds as $serverId) {
+            $cacheKey = "server:{$serverId}:traefik:dashboard_available";
+            Cache::forget($cacheKey);
+        }
+    }
+}