Ship Assistent 0.15.1: keep composer writable during hung Writing streams.

Co-authored-by: Cursor <cursoragent@cursor.com>

AssistentOllama.cs

@@ -184,6 +184,9 @@ public partial class SwarmAssistentExtension
                 ["num_predict"] = numPredict,
             },
             ["keep_alive"] = "15m",
+            // Qwen3-VL instruct still thinks by default; that holds the WS open after
+            // the visible greeting and leaves the composer looking locked.
+            ["think"] = false,
         };
         using StringContent content = new(payload.ToString(Newtonsoft.Json.Formatting.None), Encoding.UTF8, "application/json");
         using HttpRequestMessage req = new(HttpMethod.Post, $"{root}/api/chat") { Content = content };