ACP history mentions (#36551)

- **TEMP**
- **Update @-mentions to use new history**

Closes #ISSUE

Release Notes:

- N/A

crates/agent_ui/src/acp/thread_view.rs

@@ -5,7 +5,6 @@ use acp_thread::{
 };
 use acp_thread::{AgentConnection, Plan};
 use action_log::ActionLog;
-use agent::{TextThreadStore, ThreadStore};
 use agent_client_protocol::{self as acp};
 use agent_servers::{AgentServer, ClaudeCode};
 use agent_settings::{AgentProfileId, AgentSettings, CompletionMode, NotifyWhenAgentWaiting};
@@ -32,7 +31,7 @@ use language::Buffer;
 use language_model::LanguageModelRegistry;
 use markdown::{HeadingLevelStyles, Markdown, MarkdownElement, MarkdownStyle};
 use project::{Project, ProjectEntryId};
-use prompt_store::PromptId;
+use prompt_store::{PromptId, PromptStore};
 use rope::Point;
 use settings::{Settings as _, SettingsStore};
 use std::sync::Arc;
@@ -158,8 +157,7 @@ impl AcpThreadView {
         workspace: WeakEntity<Workspace>,
         project: Entity<Project>,
         history_store: Entity<HistoryStore>,
-        thread_store: Entity<ThreadStore>,
-        text_thread_store: Entity<TextThreadStore>,
+        prompt_store: Option<Entity<PromptStore>>,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Self {
@@ -168,8 +166,8 @@ impl AcpThreadView {
             MessageEditor::new(
                 workspace.clone(),
                 project.clone(),
-                thread_store.clone(),
-                text_thread_store.clone(),
+                history_store.clone(),
+                prompt_store.clone(),
                 "Message the agent — @ to include context",
                 prevent_slash_commands,
                 editor::EditorMode::AutoHeight {
@@ -187,8 +185,8 @@ impl AcpThreadView {
             EntryViewState::new(
                 workspace.clone(),
                 project.clone(),
-                thread_store.clone(),
-                text_thread_store.clone(),
+                history_store.clone(),
+                prompt_store.clone(),
                 prevent_slash_commands,
             )
         });
@@ -3201,12 +3199,18 @@ impl AcpThreadView {
                         })
                         .detach_and_log_err(cx);
                 }
-                MentionUri::Thread { id, .. } => {
+                MentionUri::Thread { id, name } => {
                     if let Some(panel) = workspace.panel::<AgentPanel>(cx) {
                         panel.update(cx, |panel, cx| {
-                            panel
-                                .open_thread_by_id(&id, window, cx)
-                                .detach_and_log_err(cx)
+                            panel.load_agent_thread(
+                                DbThreadMetadata {
+                                    id,
+                                    title: name.into(),
+                                    updated_at: Default::default(),
+                                },
+                                window,
+                                cx,
+                            )
                         });
                     }
                 }
@@ -4075,7 +4079,6 @@ fn terminal_command_markdown_style(window: &Window, cx: &App) -> MarkdownStyle {
 #[cfg(test)]
 pub(crate) mod tests {
     use acp_thread::StubAgentConnection;
-    use agent::{TextThreadStore, ThreadStore};
     use agent_client_protocol::SessionId;
     use assistant_context::ContextStore;
     use editor::EditorSettings;
@@ -4211,10 +4214,6 @@ pub(crate) mod tests {
         let (workspace, cx) =
             cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
 
-        let thread_store =
-            cx.update(|_window, cx| cx.new(|cx| ThreadStore::fake(project.clone(), cx)));
-        let text_thread_store =
-            cx.update(|_window, cx| cx.new(|cx| TextThreadStore::fake(project.clone(), cx)));
         let context_store =
             cx.update(|_window, cx| cx.new(|cx| ContextStore::fake(project.clone(), cx)));
         let history_store =
@@ -4228,8 +4227,7 @@ pub(crate) mod tests {
                     workspace.downgrade(),
                     project,
                     history_store,
-                    thread_store.clone(),
-                    text_thread_store.clone(),
+                    None,
                     window,
                     cx,
                 )
@@ -4400,6 +4398,7 @@ pub(crate) mod tests {
             ThemeSettings::register(cx);
             release_channel::init(SemanticVersion::default(), cx);
             EditorSettings::register(cx);
+            prompt_store::init(cx)
         });
     }
 
@@ -4420,10 +4419,6 @@ pub(crate) mod tests {
         let (workspace, cx) =
             cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
 
-        let thread_store =
-            cx.update(|_window, cx| cx.new(|cx| ThreadStore::fake(project.clone(), cx)));
-        let text_thread_store =
-            cx.update(|_window, cx| cx.new(|cx| TextThreadStore::fake(project.clone(), cx)));
         let context_store =
             cx.update(|_window, cx| cx.new(|cx| ContextStore::fake(project.clone(), cx)));
         let history_store =
@@ -4438,8 +4433,7 @@ pub(crate) mod tests {
                     workspace.downgrade(),
                     project.clone(),
                     history_store.clone(),
-                    thread_store.clone(),
-                    text_thread_store.clone(),
+                    None,
                     window,
                     cx,
                 )