Refactor Dataset component to avoid cross-page store dependency

[coderabbitai]

Description

The Dataset component in the SearchPage is currently using useIngestStatsStore from the IngestPage, which creates inappropriate coupling between different pages/components.

Context

This architectural concern was identified during code review where the Dataset component imports and uses a store from another page, violating good separation of concerns.

Expected Outcome

The Dataset component should be refactored to either:

• Use a shared/global store for common data like refresh intervals
• Have its own local state management
• Receive necessary data through props

References

• Original PR: feat(clp-package): Expose dataset selection in package CLI scripts and web UI.  #1050
• Comment thread: feat(clp-package): Expose dataset selection in package CLI scripts and web UI.  #1050 (comment)
• Reported by: @hoophalab