# PG-PAGE-003: Kanban Board Page

## Task

Build Kanban board page with drag-and-drop columns mapped to TaskStatus.

## Issue

Refs #468

## Files Changed

- `apps/web/src/app/(authenticated)/kanban/page.tsx` (new)
- `apps/web/src/lib/api/tasks.ts` (added `updateTask`)
- `package.json` / `pnpm-lock.yaml` (added `@hello-pangea/dnd`)

## Design Decisions

- Used `@hello-pangea/dnd` (maintained fork of react-beautiful-dnd) for drag-and-drop
- 5 columns mapped to TaskStatus enum: NOT_STARTED, IN_PROGRESS, PAUSED, COMPLETED, ARCHIVED
- Optimistic update pattern: move card immediately, revert by re-fetching on API failure
- Priority badge always shown (field is non-optional in Task type)
- Column count badge uses `color-mix()` for transparent accent backgrounds
- Horizontal scroll on mobile with `overflow-x: auto` and `min-width: 280px` per column

## Verification

- Lint: clean (my files pass, pre-existing errors in runner-jobs.ts not my scope)
- Build: `next build` succeeds, `/kanban` route present in output
- TypeScript: no type errors
- Design tokens: all colors from CSS custom properties, no hardcoded colors

## Status

Complete