Correct README claims about task-card scroll motion

[coderabbitai]

Summary

Align the README animation documentation with the current scroll behavior.

Required changes

• Correct the statement that reduced motion makes scrolling instant, unless a smooth default is implemented.
• Document the actual scroll behavior accurately.

Affected areas

• README.md
• Scroll styling or task-card scroll implementation, if behavior is changed

Acceptance criteria

• Documentation matches the behavior of scrollIntoView({ block: 'center' }).
• If reduced-motion behavior is documented, the default and reduced-motion paths are both implemented and accurate.

Source

• Review comment: Feature/bonus points #39 (comment)
• Pull request: Feature/bonus points #39
• Requested by: @Alejandroq12

[coderabbitai]

Technical note

Treat motion documentation as a behavior contract. scrollIntoView({ block: 'center' }) does not request smooth scrolling by itself. If the application promises reduced-motion support, implement an explicit behavior choice based on prefers-reduced-motion, then document both paths.

Reference: MDN: scrollIntoView()

[coderabbitai]

Engineering note

Document observable behavior, not intended behavior. scrollIntoView({ block: "center" }) controls alignment but does not request smooth scrolling. If reduced-motion behavior is a requirement, implement an explicit behavior value and verify both preference paths.

Read: MDN: Element.scrollIntoView()