chore: archive refactor-chat-view-ink-scroll-view change

[avoidwork]

Description

Archives the refactor-chat-view-ink-scroll-view change after all tasks were completed. Merges the tui-scroll-view delta spec into the main specs as the baseline.

Type of Change

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature which adds functionality not work as expected)
• Documentation update
• Refactor (no functional change)
• Performance improvement
• CI / build / tooling

Testing

Pre-commit hooks ran npm run fix (lint + format) and npm run coverage successfully. All existing tests continue to pass with 100% coverage maintained.

Coverage

• 100% line coverage maintained

Checklist

• npm run lint passes
• Tests pass with 100% line coverage
• No forbidden patterns used
• Conventional Commit style applied