fix: server is functional check

resources/views/livewire/destination/show.blade.php

@@ -1,5 +1,5 @@
 <div>
-    @if ($server->settings->is_usable)
+    @if ($server->isFunctional())
         <div class="flex items-end gap-2">
             <h2>Destinations</h2>
             <a href="{{ route('destination.new', ['server_id' => $server->id]) }}">

resources/views/livewire/server/form.blade.php

@@ -20,7 +20,7 @@
             @endif
 
         </div>
-        @if (!$server->settings->is_reachable || !$server->settings->is_usable)
+        @if (!$server->isFunctional())
             You can't use this server until it is validated.
         @else
             Server validated.
@@ -57,7 +57,7 @@
                 Install Docker Engine 24.0
             </x-forms.button>
         @endif
-        @if ($server->settings->is_usable)
+        @if ($server->isFunctional())
             <h3 class="py-4">Settings</h3>
                 <x-forms.input id="cleanup_after_percentage" label="Disk Cleanup threshold (%)" required
                     helper="Disk cleanup job will be executed if disk usage is more than this number." />

resources/views/livewire/server/proxy.blade.php

@@ -1,5 +1,5 @@
 <div>
-    @if (data_get($server,'settings.is_usable'))
+    @if ($server->isFunctional())
         @if (data_get($server,'proxy.type'))
         <x-modal submitWireAction="proxyStatusUpdated" modalId="startProxy">
             <x-slot:modalBody>