style: fix formatting

https://claude.ai/code/session_01GG37cPSH8vfi9nriukuorf

src/agent/thread_ops.rs

@@ -2183,7 +2183,10 @@ mod tests {
                 None => Err("Internal error: thread no longer exists"),
             };
             assert!(result.is_err());
-            assert_eq!(result.unwrap_err(), "Internal error: thread no longer exists");
+            assert_eq!(
+                result.unwrap_err(),
+                "Internal error: thread no longer exists"
+            );
         }
 
         // Scenario 2: Thread existed then was removed (simulates disappearance
@@ -2210,7 +2213,10 @@ mod tests {
                 None => Err("Internal error: thread no longer exists"),
             };
             assert!(result.is_err());
-            assert_eq!(result.unwrap_err(), "Internal error: thread no longer exists");
+            assert_eq!(
+                result.unwrap_err(),
+                "Internal error: thread no longer exists"
+            );
         }
     }