acp: Fix model selector sometimes showing no models (#37006)

Release Notes:

- acp: Fix an issue where the model selector would sometimes be empty

---------

Co-authored-by: Antonio Scandurra <me@as-cii.com>

crates/acp_thread/src/connection.rs

@@ -232,13 +232,6 @@ impl AgentModelList {
             AgentModelList::Grouped(groups) => groups.is_empty(),
         }
     }
-
-    pub fn len(&self) -> usize {
-        match self {
-            AgentModelList::Flat(models) => models.len(),
-            AgentModelList::Grouped(groups) => groups.values().len(),
-        }
-    }
 }
 
 #[cfg(feature = "test-support")]

crates/agent_ui/src/acp/model_selector.rs

@@ -71,13 +71,10 @@ impl AcpModelPickerDelegate {
                     let (models, selected_model) = futures::join!(models_task, selected_model_task);
 
                     this.update_in(cx, |this, window, cx| {
-                        this.delegate.models = models.log_err();
+                        this.delegate.models = models.ok();
                         this.delegate.selected_model = selected_model.ok();
-                        this.delegate.update_matches(this.query(cx), window, cx)
-                    })?
-                    .await;
-
-                    Ok(())
+                        this.refresh(window, cx)
+                    })
                 }
 
                 refresh(&this, &session_id, cx).await.log_err();
@@ -144,11 +141,6 @@ impl PickerDelegate for AcpModelPickerDelegate {
         cx.spawn_in(window, async move |this, cx| {
             let filtered_models = match this
                 .read_with(cx, |this, cx| {
-                    if let Some(models) = this.delegate.models.as_ref() {
-                        log::debug!("Filtering {} models.", models.len());
-                    } else {
-                        log::debug!("No models available.");
-                    }
                     this.delegate.models.clone().map(move |models| {
                         fuzzy_search(models, query, cx.background_executor().clone())
                     })
@@ -160,8 +152,6 @@ impl PickerDelegate for AcpModelPickerDelegate {
                 None => AgentModelList::Flat(vec![]),
             };
 
-            log::debug!("Filtered models. {} available.", filtered_models.len());
-
             this.update_in(cx, |this, window, cx| {
                 this.delegate.filtered_entries =
                     info_list_to_picker_entries(filtered_models).collect();