sidebar: Fix sidebar and archive view content display (#51930)

- Don't filter out what we show in the archive view; unconditionally
display archived threads for all sessions
- Ensure we refresh sidebar content on startup

---

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Release Notes:

- N/A

---------

Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>
Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>
Co-authored-by: cameron <cameron.studdstreet@gmail.com>

crates/agent_ui/src/thread_metadata_store.rs

@@ -188,14 +188,6 @@ impl SidebarThreadMetadataStore {
         })
     }
 
-    pub fn list_sidebar_ids(&self, cx: &App) -> Task<Result<Vec<acp::SessionId>>> {
-        let db = self.db.clone();
-        cx.background_spawn(async move {
-            let s = db.list_sidebar_ids()?;
-            Ok(s)
-        })
-    }
-
     pub fn list(&self, cx: &App) -> Task<Result<Vec<ThreadMetadata>>> {
         let db = self.db.clone();
         cx.background_spawn(async move {
@@ -323,16 +315,6 @@ impl ThreadMetadataDb {
             .map(|ids| ids.into_iter().map(|id| acp::SessionId::new(id)).collect())
     }
 
-    /// List session IDs of threads that belong to a real project workspace
-    /// (i.e. have non-empty folder_paths). These are the threads shown in
-    /// the sidebar, as opposed to threads created in empty workspaces.
-    pub fn list_sidebar_ids(&self) -> anyhow::Result<Vec<acp::SessionId>> {
-        self.select::<Arc<str>>(
-            "SELECT session_id FROM sidebar_threads WHERE folder_paths IS NOT NULL AND folder_paths != ''",
-        )?()
-        .map(|ids| ids.into_iter().map(|id| acp::SessionId::new(id)).collect())
-    }
-
     /// List all sidebar thread metadata, ordered by updated_at descending.
     pub fn list(&self) -> anyhow::Result<Vec<ThreadMetadata>> {
         self.select::<ThreadMetadata>(

crates/agent_ui/src/threads_archive_view.rs

@@ -2,7 +2,7 @@ use std::sync::Arc;
 
 use crate::{
     Agent, RemoveSelectedThread, agent_connection_store::AgentConnectionStore,
-    thread_history::ThreadHistory, thread_metadata_store::SidebarThreadMetadataStore,
+    thread_history::ThreadHistory,
 };
 use acp_thread::AgentSessionInfo;
 use agent::ThreadStore;
@@ -244,21 +244,11 @@ impl ThreadsArchiveView {
         let today = Local::now().naive_local().date();
 
         self._update_items_task.take();
-        let unarchived_ids_task = SidebarThreadMetadataStore::global(cx)
-            .read(cx)
-            .list_sidebar_ids(cx);
         self._update_items_task = Some(cx.spawn(async move |this, cx| {
-            let unarchived_session_ids = unarchived_ids_task.await.unwrap_or_default();
-
             let mut items = Vec::with_capacity(sessions.len() + 5);
             let mut current_bucket: Option<TimeBucket> = None;
 
             for session in sessions {
-                // Skip sessions that are shown in the sidebar
-                if unarchived_session_ids.contains(&session.session_id) {
-                    continue;
-                }
-
                 let highlight_positions = if !query.is_empty() {
                     let title = session.title.as_ref().map(|t| t.as_ref()).unwrap_or("");
                     match fuzzy_match_positions(&query, title) {

crates/sidebar/src/sidebar.rs

@@ -321,7 +321,7 @@ impl Sidebar {
             this.update_entries(cx);
         });
 
-        Self {
+        let mut this = Self {
             _list_threads_task: None,
             multi_workspace: multi_workspace.downgrade(),
             width: DEFAULT_WIDTH,
@@ -340,7 +340,9 @@ impl Sidebar {
             recent_projects_popover_handle: PopoverMenuHandle::default(),
             _subscriptions: Vec::new(),
             _draft_observation: None,
-        }
+        };
+        this.list_threads(cx);
+        this
     }
 
     fn subscribe_to_workspace(