fix(browser): extend hook arm timeouts

docs/browser.md

@@ -189,6 +189,7 @@ Actions:
 
 Notes:
 - `upload` and `dialog` are **arming** calls; run them before the click/press that triggers the chooser/dialog.
+- The arm default timeout is **30s**; pass `timeoutMs` if you need longer.
 - `snapshot --format ai` returns AI snapshot markup used for ref-based actions.
 
 ## Security & privacy notes