Implements the schedule module for COMPASS construction PM:
- D1/Drizzle schema: tasks, dependencies, phases tables
- frappe-gantt integration for interactive timeline view
- Critical path analysis (forward/backward pass, float calc)
- Dependency validation with cycle detection
- Business day calculations (skip weekends/holidays)
- Date propagation engine for cascading schedule changes
- Task CRUD with phase assignment and progress tracking
- Dependency management (FS/FF/SS/SF with lag support)
- Dual view: sortable list view + gantt chart view
Also includes full Next.js app scaffold with dashboard,
shadcn/ui components, and Cloudflare Workers deployment config.
