ai: Enable reasoning for supported models.

jarvis.py

@@ -219,8 +219,13 @@ async def fetch_response_stream_async(host, key, model, msgs, cfg, sid, stop_eve
                                 j = json.loads(data)
                                 if isinstance(j, dict) and j.get("choices"):
                                     ch = j["choices"][0]
-                                    if ch.get("delta") and isinstance(ch["delta"].get("content"), str):
-                                        yield ch["delta"]["content"]
+                                    delta = ch.get("delta", {})
+                                    reasoning = delta.get("reasoning")
+                                    content = delta.get("content")
+                                    if reasoning:
+                                        yield reasoning
+                                    if content:
+                                        yield content
                             except:
                                 continue
         except: