fix: fix checkbox style

[huhuanming]

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[what-the-diff]

PR Summary

• Adjustment to Input Component
  The flex={1} attributed has been added to the Input component. This alteration helps this component to occupy the entire available space when placed within a container that uses flexible box layout, thereby improving the responsiveness and user interface.

• Changes to TextInput Component
  For the TextInput component, flex={1} was removed, and borderWidth={0} along with borderRightWidth={0} has been added. The elimination of flex allows this component more control over its size irrespective of the container size. Moreover, the added attributes remove the boundary and the right side border of the text input field which ultimately results in a cleaner interface.

• Removal of CSS Rules
  The CSS rules for button[role="checkbox"]:focus were removed from the main index.css file. This change simplifies the style rules for a focused checkbox, resulting in a more straightforward and cleaner UI design.