Fix ghost project when selecting remote project group

[procr1337]

Objective

Fixes #54882:

When selecting a project group that has a remote host (SSH, WSL, Docker) from the window project picker, or when closing/removing a workspace with a remote neighbor group, the code was unconditionally calling find_or_create_local_workspace. This created a local project with the remote server's paths, producing a 'ghost' project where language servers and file watchers fail trying to access paths that don't exist locally.

Solution

Three locations fixed:

1. RecentProjectsDelegate::confirm (recent_projects.rs) - window project picker selecting a ProjectGroup entry. Routes to find_or_create_workspace with connect_with_modal for remote hosts.

2. MultiWorkspace::close_workspace (multi_workspace.rs) - closing a workspace whose neighboring group is remote. Falls through to the empty workspace fallback instead of creating a ghost project.

3. MultiWorkspace::remove_project_group (multi_workspace.rs) - removing a project group whose neighbor is remote. Same fallback.

All three detect remoteness via key.host().is_some() and skip find_or_create_local_workspace when set.

Includes regression tests for all three paths using mock remote connections.

Testing

• Not yet tested with a custom build
• Unit tests added

Self-Review Checklist:

• I've reviewed my own diff for quality, security, and reliability
• Unsafe blocks (if any) have justifying comments
• The content adheres to Zed's UI standards (UX/UI and icon guidelines)
• Tests cover the new/changed behavior
• Performance impact has been considered and is acceptable

Showcase

---

Release Notes:

• Fixed ghost project appearing in the window project picker and sidebar when switching between local and remote projects.

[Veykril]

I think this can just be

Suggested change

	if host.is_some() {
	let modal_workspace = multi_workspace.workspace().clone();
	multi_workspace.find_or_create_workspace(
	path_list,
	host,
	Some(key.clone()),
	move |options, window, cx| {
	connect_with_modal(
	&modal_workspace,
	options,
	window,
	cx,
	)
	},
	&[],
	None,
	OpenMode::Activate,
	window,
	cx,
	)
	} else {
	multi_workspace.find_or_create_local_workspace(
	path_list,
	Some(key.clone()),
	&[],
	None,
	OpenMode::Activate,
	window,
	cx,
	)
	}
	let modal_workspace = multi_workspace.workspace().clone();
	multi_workspace.find_or_create_workspace(
	path_list,
	host,
	Some(key.clone()),
	move |options, window, cx| {
	connect_with_modal(
	&modal_workspace,
	options,
	window,
	cx,
	)
	},
	&[],
	None,
	OpenMode::Activate,
	window,
	cx,
	)

[Veykril]

Thanks!