fix: Ensure deterministic height adjustment in handleKeydown #1863
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This PR improves the fix introduced in #1854 by ensuring the textarea height adjustment completes deterministically after the submit event is dispatched.
Previously, there was a race condition where the textarea height adjustment could be scheduled but not applied before submission, leading to inconsistent UI behavior.
Changes:
tick().then()
inhandleKeydown
ensuring DOM updates are applied after the submit event is dispatched.Fixes: #1854