* add condition to disable post button when CW text is empty
* standardize condition by using 1<= inserted of 0<
* unify CW text length condition to improve readability
* add missing CW state check
* fix state check, add empty/null check, improve max length validation
* simplify CW validation by removing minimum length check
* Update CHANGELOG
* remove CW text validation in post()
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Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>
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