Handle buffer diff base updates and file renames properly for SSH projects (#14989)

Release Notes:

- N/A

---------

Co-authored-by: Conrad <conrad@zed.dev>

crates/assistant/src/slash_command/diagnostics_command.rs

@@ -284,7 +284,7 @@ fn collect_diagnostics(
         PathBuf::try_from(path)
             .ok()
             .and_then(|path| {
-                project.read(cx).worktrees().find_map(|worktree| {
+                project.read(cx).worktrees(cx).find_map(|worktree| {
                     let worktree = worktree.read(cx);
                     let worktree_root_path = Path::new(worktree.root_name());
                     let relative_path = path.strip_prefix(worktree_root_path).ok()?;

crates/assistant/src/slash_command/docs_command.rs

@@ -24,7 +24,7 @@ impl DocsSlashCommand {
     pub const NAME: &'static str = "docs";
 
     fn path_to_cargo_toml(project: Model<Project>, cx: &mut AppContext) -> Option<Arc<Path>> {
-        let worktree = project.read(cx).worktrees().next()?;
+        let worktree = project.read(cx).worktrees(cx).next()?;
         let worktree = worktree.read(cx);
         let entry = worktree.entry_for_path("Cargo.toml")?;
         let path = ProjectPath {

crates/assistant/src/slash_command/file_command.rs

@@ -188,7 +188,7 @@ fn collect_files(
     let project_handle = project.downgrade();
     let snapshots = project
         .read(cx)
-        .worktrees()
+        .worktrees(cx)
         .map(|worktree| worktree.read(cx).snapshot())
         .collect::<Vec<_>>();
     cx.spawn(|mut cx| async move {

crates/assistant/src/slash_command/project_command.rs

@@ -75,7 +75,7 @@ impl ProjectSlashCommand {
     }
 
     fn path_to_cargo_toml(project: Model<Project>, cx: &mut AppContext) -> Option<Arc<Path>> {
-        let worktree = project.read(cx).worktrees().next()?;
+        let worktree = project.read(cx).worktrees(cx).next()?;
         let worktree = worktree.read(cx);
         let entry = worktree.entry_for_path("Cargo.toml")?;
         let path = ProjectPath {