Enhance SwarmUI integration by adding swarm connection status to the API and updating client-side components to reflect this status. Improved localization strings for various SwarmUI states and refactored ApplicantsDialog and PersonCard components to utilize the new connection information, ensuring a more responsive user experience.

src/HSchool.Server/Game/SwarmUiClient.cs

@@ -28,6 +28,33 @@ internal sealed class SwarmUiClient
 
     public bool IsConfigured => !string.IsNullOrWhiteSpace(_options.BaseUrl);
 
+    /// <summary>Opens a session to verify SwarmUI responds; does not generate an image.</summary>
+    public async Task<bool> ProbeAsync(TimeSpan timeout, CancellationToken cancellationToken)
+    {
+        if (!IsConfigured)
+        {
+            return false;
+        }
+
+        using var timeoutSource = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
+        timeoutSource.CancelAfter(timeout);
+
+        try
+        {
+            await RefreshSessionAsync(timeoutSource.Token);
+            return true;
+        }
+        catch (OperationCanceledException) when (!cancellationToken.IsCancellationRequested)
+        {
+            return false;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogDebug(ex, "SwarmUI probe failed.");
+            return false;
+        }
+    }
+
     public async Task<byte[]> GenerateAsync(
         string prompt,
         string negativePrompt,