As a Care worker or management, I want to have a digital verification code to verify my login.

Acceptance criteria

• The verification code is a pure number with a configurable length.
• Displays in the specified area.
• The user can re-generate the verification code through the button, and the verification code update is immediately visible.
• After the user enters the verification code, the system can correctly verify whether the input matches the current verification code.
• The verification result (success or failure) is communicated to the user with a clear prompt.
• The interface is compatible with mainstream browsers.

Tasks

• Verification code generation
• Captcha display
• User input and validation
• Interface design and interaction
• Browser compatibility testing