agent: Improve terminal tool card design (#29712)

To-dos:

- [x] Expose the command to defend against cases where that's just super
long
- [x] Tackle the vertical scroll conflict with panel scroll
- [x] Reduce default font-size

Release Notes:

- N/A

---------

Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>
Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>
Co-authored-by: Agus Zubiaga <hi@aguz.me>

crates/assistant_tools/src/edit_file_tool.rs

@@ -708,7 +708,6 @@ impl ToolCard for EditFileToolCard {
                                 .cursor_pointer()
                                 .h_5()
                                 .justify_center()
-                                .rounded_b_md()
                                 .border_t_1()
                                 .border_color(border_color)
                                 .bg(cx.theme().colors().editor_background)