fix(sentinel): refresh server nav after toggles

Dispatch server show refreshes after Sentinel and metrics toggles, preserve editable Sentinel form fields during restart events, and gate custom image editing by update permission.

app/Livewire/Server/Sentinel.php

@@ -104,7 +104,7 @@ class Sentinel extends Component
         }
     }
 
-    public function toggleSentinel()
+    public function toggleSentinel(): void
     {
         try {
             $this->authorize('manageSentinel', $this->server);
@@ -124,8 +124,9 @@ class Sentinel extends Component
                 StopSentinel::dispatch($this->server);
             }
             $this->submit();
+            $this->dispatch('refreshServerShow');
         } catch (\Throwable $e) {
-            return handleError($e, $this);
+            handleError($e, $this);
         }
     }