chronogrid/docs/UI_UX/02-calendar-timeblocking.md

Calendar & Time-Blocking Grid Specification

1. Display Interface

• Multi-day, Weekly, and Monthly time-blocking grids rendered via Flutter custom painter.
• Drag-and-drop task placement: Dragging an unscheduled task onto the grid automatically updates its due_date timestamp and reserves a dedicated block based on its stimated_duration.

2. Local CalDAV Bridge Protocol

• Local Endpoint: Embedded HTTPS/CalDAV service running locally on 127.0.0.1:4242.
• Interoperability: Allows native OS calendar tools (Outlook, Thunderbird, Android DAVx⁵) to read scheduled task blocks directly as standard calendar events without sending data to external cloud servers.