Restore tool cards on thread deserialization (#30053)

Release Notes:

- N/A

---------

Co-authored-by: Julia Ryan <juliaryan3.14@gmail.com>

crates/assistant_tools/src/terminal_tool.rs

@@ -178,7 +178,7 @@ impl Tool for TerminalTool {
                 let exit_status = child.wait()?;
                 let (processed_content, _) =
                     process_content(content, &input.command, Some(exit_status));
-                Ok(processed_content)
+                Ok(processed_content.into())
             });
             return ToolResult {
                 output: task,
@@ -266,7 +266,7 @@ impl Tool for TerminalTool {
                     card.elapsed_time = Some(card.start_instant.elapsed());
                 });
 
-                Ok(processed_content)
+                Ok(processed_content.into())
             }
         });
 
@@ -661,7 +661,7 @@ mod tests {
             )
         });
 
-        let output = result.output.await.log_err();
+        let output = result.output.await.log_err().map(|output| output.content);
         assert_eq!(output, Some("Command executed successfully.".into()));
     }
 
@@ -693,7 +693,11 @@ mod tests {
                 cx,
             );
             cx.spawn(async move |_| {
-                let output = headless_result.output.await.log_err();
+                let output = headless_result
+                    .output
+                    .await
+                    .log_err()
+                    .map(|output| output.content);
                 assert_eq!(output, expected);
             })
         };