# Gantt Board

Task and sprint board built with Next.js + Zustand and file-backed API persistence.

## Current Product Behavior

### Data model and status rules

- Tasks use labels (`tags: string[]`) and can have multiple labels.
- There is no active `backlog` status in workflow logic.
- A task is considered in Backlog when `sprintId` is empty.
- Current status values:
  - `open`
  - `todo`
  - `blocked`
  - `in-progress`
  - `review`
  - `validate`
  - `archived`
  - `canceled`
  - `done`
- New tasks default to `status: open`.

### Labels

- Project selection UI for tasks was removed in favor of labels.
- You can add/remove labels inline in:
  - New Task modal
  - Task Detail modal
- Label entry supports:
  - Enter/comma to add
  - Existing-label suggestions
  - Quick-add chips
  - Case-insensitive de-duplication

### Backlog drag and drop

Backlog view supports moving tasks between:
- Current sprint
- Other sprint sections
- Backlog

Status behavior on drop:
- Drop into any sprint section: `status -> open`
- Drop into backlog section: `status -> open`
- `sprintId` is set/cleared based on destination

Changes persist through store sync to `data/tasks.json`.

### Kanban drag and drop

Kanban supports drag by visible left handle on each task card.

Columns:
- `To Do` contains statuses: `open`, `todo`
- `In Progress` contains statuses: `blocked`, `in-progress`, `review`, `validate`
- `Done` contains statuses: `archived`, `canceled`, `done`

Drop behavior:
- Drop on column body: applies that column's default status
  - `To Do` -> `open`
  - `In Progress` -> `in-progress`
  - `Done` -> `done`
- Drop on status chip target: applies exact status
- Drop on a task: adopts that task's exact status

During drag, the active target column shows expanded status drop zones for clarity.

### Layout

- Left sidebar cards (Current Sprint and Labels quick view) were removed.
- Main board now uses full width for Kanban/Backlog views.

## Persistence

- Client state is managed with Zustand.
- Persistence is done via `/api/tasks`.
- API reads/writes `data/tasks.json` (single-file storage).

## Run locally

```bash
npm install
npm run dev
```

Open `http://localhost:3000`.

## Scripts

```bash
npm run dev
npm run build
npm run start
npm run lint
```

## Notes

- You may see a Next.js warning about multiple lockfiles and inferred workspace root. This is non-blocking for local dev.