agent: Allow renaming threads (#28102)

Release Notes:

- agent: Add support for renaming threads

---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>
Co-authored-by: Richard Feldman <oss@rtfeldman.com>

crates/agent/src/active_thread.rs

@@ -512,7 +512,9 @@ impl ActiveThread {
             ThreadEvent::ShowError(error) => {
                 self.last_error = Some(error.clone());
             }
-            ThreadEvent::StreamedCompletion | ThreadEvent::SummaryChanged => {
+            ThreadEvent::StreamedCompletion
+            | ThreadEvent::SummaryGenerated
+            | ThreadEvent::SummaryChanged => {
                 self.save_thread(cx);
             }
             ThreadEvent::DoneStreaming => {