Fix agent reading and editing files over SSH (#30144)

Release Notes:

- Fixed a bug that would prevent the agent from working over SSH.

---------

Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Richard Feldman <oss@rtfeldman.com>
Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>
Co-authored-by: Cole Miller <m@cole-miller.net>

crates/assistant_tool/src/assistant_tool.rs

@@ -18,6 +18,7 @@ use gpui::IntoElement;
 use gpui::Window;
 use gpui::{App, Entity, SharedString, Task, WeakEntity};
 use icons::IconName;
+use language_model::LanguageModel;
 use language_model::LanguageModelRequestMessage;
 use language_model::LanguageModelToolSchemaFormat;
 use project::Project;
@@ -208,6 +209,7 @@ pub trait Tool: 'static + Send + Sync {
         messages: &[LanguageModelRequestMessage],
         project: Entity<Project>,
         action_log: Entity<ActionLog>,
+        model: Arc<dyn LanguageModel>,
         window: Option<AnyWindowHandle>,
         cx: &mut App,
     ) -> ToolResult;