fix(result_stream): stream reasoning before content in stream (#2398)

Author: laststylebender14

crates/forge_domain/src/result_stream_ext.rs

@@ -77,28 +77,28 @@ impl ResultStreamExt<anyhow::Error> for crate::BoxStream<ChatCompletionMessage,
 
                 // Stream content delta if sender is available
                 if let Some(ref sender) = sender {
-                    if let Some(content_part) = message.content.as_ref() {
-                        let delta = content_part.as_str();
+                    if let Some(reasoning_part) = message.reasoning.as_ref() {
+                        let delta = reasoning_part.as_str();
                         if !delta.is_empty() {
                             // Ignore send errors - the receiver may have been dropped
                             let _ = sender
-                                .send(Ok(ChatResponse::TaskMessage {
-                                    content: ChatResponseContent::Markdown {
-                                        text: delta.to_string(),
-                                        partial: true,
-                                    },
+                                .send(Ok(ChatResponse::TaskReasoning {
+                                    content: delta.to_string(),
                                 }))
                                 .await;
                         }
                     }
 
-                    if let Some(reasoning_part) = message.reasoning.as_ref() {
-                        let delta = reasoning_part.as_str();
+                    if let Some(content_part) = message.content.as_ref() {
+                        let delta = content_part.as_str();
                         if !delta.is_empty() {
                             // Ignore send errors - the receiver may have been dropped
                             let _ = sender
-                                .send(Ok(ChatResponse::TaskReasoning {
-                                    content: delta.to_string(),
+                                .send(Ok(ChatResponse::TaskMessage {
+                                    content: ChatResponseContent::Markdown {
+                                        text: delta.to_string(),
+                                        partial: true,
+                                    },
                                 }))
                                 .await;
                         }