fix: typing issue fix while entering artifact name

[krishna9358]

Summary

The cursor was jumping to the end of the input field after each keystroke. This is a classic React controlled input issue where the parent component's state update caused a re-render that reset the cursor position.

• Added localValue state - The input now uses a local state variable (localValue) for its value attribute instead of directly using the prop value. This ensures React preserves the cursor position during synchronous state updates.
• Smart sync logic - The useEffect only syncs the parent's value prop to localValue when it's genuinely different (i.e., external changes like switching nodes or resetting). This prevents the cursor from jumping when the parent echoes back the same value we just sent via onChange.
• Immediate parent updates - The handleInputChange function updates both the local state and calls the parent's onChange immediately, keeping data in sync while preventing cursor issues.

Testing

• bun run test
• bun run lint
• bun run typecheck
• Additional notes:

Documentation

• Updated the relevant doc(s) (see docs/guide.md) or checked that no updates are needed.
• Recorded contract/architecture changes in both public docs and .ai logs when applicable.

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