hive-subagent-mcp: write the fake-claude test script via write_executable

hive-subagent-mcp/src/session.rs

@@ -3578,18 +3578,14 @@ mod tests {
     /// EOF, so `RunningClaude::wait` would not return until the orphaned
     /// sleep expired, and the turn would look like it was still running.
     fn fake_claude(dir: &Path, log: &Path) -> PathBuf {
-        use std::os::unix::fs::PermissionsExt as _;
         let script = dir.join("fake-claude");
-        std::fs::write(
+        write_executable(
             &script,
-            format!(
+            &format!(
                 "#!/bin/sh\necho turn >> '{}'\ntrap 'exit 0' INT\nsleep 30 >/dev/null 2>&1 &\nwait\n",
                 log.display()
             ),
-        )
-        .expect("write the fake claude");
-        std::fs::set_permissions(&script, std::fs::Permissions::from_mode(0o755))
-            .expect("make the fake claude executable");
+        );
         script
     }