[Aaqibhafeezkhan]

Summary

• Split open review items into Questions to explore and Needs review.
• Add Ask and Dismiss actions for open questions; Ask opens the Assistant with the item's research prompt.
• Keep Resolve for review tasks.
• Show the selected item's details, research prompts, and associated source information in the detail pane.
• Add a core test for distinguishing question items from review tasks.

Closes #17

[Aaqibhafeezkhan]

The queue now separates research questions from review tasks, preserves the existing resolve workflow, and routes questions to the Assistant without silently dismissing them.