Move task detail modal logic from App into a dedicated TaskDetailModal
component. The modal now manages its own state (open/closed, loading,
error states) and handles its own focus and scroll. App delegates modal
operations to the component and reacts to its events.
Split the task detail modal into its own view and add a generic modal
frame, plus new models and service mapping for task details. Update app layout,
keymaps, and sidebar focus events to support the modal and keyboard flow, with small
UI tweaks like wrapping and scroll handling.
Ignacio Perez