Project Alpha

Build a drag-and-drop Kanban board with columns: Backlog, In Progress, Review, Done. Each card shows title, assignee avatar, priority badge (Low/Medium/High), and due date. Support adding new cards via a form, dragging cards between columns with visual feedback, and card count per column. Include a board title "Project Alpha" and filter by assignee. Use the Gumroad design system: cream background, black borders, pill-shaped buttons, pink accent. No shadows, no gradients.