Fix ineffective restartInitiated guard with proper debouncing

The guard was setting and immediately resetting the flag in the same
synchronous execution, providing no actual protection. Now the flag
stays true until proxy reaches a stable state (running/exited/error)
via WebSocket notification, with additional client-side guard.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/Livewire/Server/Navbar.php

@@ -67,7 +67,7 @@ class Navbar extends Component
         try {
             $this->authorize('manageProxy', $this->server);
 
-            // Prevent duplicate restart messages (e.g., from double-click or re-render)
+            // Prevent duplicate restart calls
             if ($this->restartInitiated) {
                 return;
             }
@@ -75,10 +75,6 @@ class Navbar extends Component
 
             // Always use background job for all servers
             RestartProxyJob::dispatch($this->server);
-            // $this->dispatch('info', 'Proxy restart initiated.');
-
-            // Reset the flag after a short delay to allow future restarts
-            $this->restartInitiated = false;
 
         } catch (\Throwable $e) {
             $this->restartInitiated = false;
@@ -147,6 +143,11 @@ class Navbar extends Component
             $this->dispatch('activityMonitor', $event['activityId']);
         }
 
+        // Reset restart flag when proxy reaches a stable state
+        if (in_array($this->proxyStatus, ['running', 'exited', 'error'])) {
+            $this->restartInitiated = false;
+        }
+
         // Skip notification if we already notified about this status (prevents duplicates)
         if ($this->lastNotifiedStatus === $this->proxyStatus) {
             return;

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

@@ -181,6 +181,7 @@
                         }
                     });
                     $wire.$on('restartEvent', () => {
+                        if ($wire.restartInitiated) return;
                         window.dispatchEvent(new CustomEvent('startproxy'))
                         $wire.$call('restart');
                     });