agent: Add soft-wrap to long terminal command JSON (#33188)

Closes: https://github.com/zed-industries/zed/issues/33179

| Before | After | 
| - | - |
| <img width="341" alt="Screenshot 2025-06-21 at 23 06 01"
src="https://github.com/user-attachments/assets/963a3663-b24f-4946-8b48-2c1222cdef2e"
/> | <img width="424" alt="Screenshot 2025-06-21 at 23 08 13"
src="https://github.com/user-attachments/assets/51051221-fda2-48af-ae42-a04989bb4913"
/> |

Release Notes:

- N/A

crates/agent/src/active_thread.rs

@@ -303,7 +303,7 @@ fn tool_use_markdown_style(window: &Window, cx: &mut App) -> MarkdownStyle {
         base_text_style: text_style,
         syntax: cx.theme().syntax().clone(),
         selection_background_color: cx.theme().players().local().selection,
-        code_block_overflow_x_scroll: true,
+        code_block_overflow_x_scroll: false,
         code_block: StyleRefinement {
             margin: EdgesRefinement::default(),
             padding: EdgesRefinement::default(),