# Phase 4: Per-Board Access Control UI

**Status:** ⬜ Not Started
**Parent plan:** [PLAN.md](./PLAN.md)
**Domain:** fullstack

## Objective
Add a user-friendly access control interface for boards, allowing admins to manage per-board permissions with user/group pickers and visual indicators.

## Tasks

- [ ] Task 1: Create `src/lib/components/board/BoardAccessControl.svelte` — inline permission editor for boards
- [ ] Task 2: Add access control tab/section to board editor page
- [ ] Task 3: Create `src/routes/api/boards/[id]/permissions/+server.ts` — GET/POST/DELETE permissions for a board
- [ ] Task 4: Update `src/lib/components/admin/PermissionEditor.svelte` — enhance with user/group search/autocomplete
- [ ] Task 5: Update `src/lib/components/board/BoardCard.svelte` — show access level indicator (icon/badge)
- [ ] Task 6: Update `src/routes/boards/+page.svelte` — show access indicators on board list
- [ ] Task 7: Add guest access toggle with preview description to board editor
- [ ] Task 8: Create `src/lib/components/board/BoardShareDialog.svelte` — quick share dialog for boards

## Files to Modify/Create
- `src/lib/components/board/BoardAccessControl.svelte` — NEW
- `src/lib/components/board/BoardShareDialog.svelte` — NEW
- `src/routes/api/boards/[id]/permissions/+server.ts` — NEW
- `src/routes/boards/[boardId]/edit/+page.svelte` — MODIFY
- `src/routes/boards/[boardId]/edit/+page.server.ts` — MODIFY
- `src/lib/components/admin/PermissionEditor.svelte` — MODIFY
- `src/lib/components/board/BoardCard.svelte` — MODIFY
- `src/routes/boards/+page.svelte` — MODIFY

## Acceptance Criteria
- Board editor has a permissions section for managing access
- Admins can grant/revoke view/edit/admin permissions per user or group
- Board list shows access indicators (shared icon, guest badge, etc.)
- Quick share dialog allows easy permission granting
- Guest access toggle works with visual feedback

## Notes
- The permission system already exists from MVP (permissionService)
- This phase adds the UI layer on top of existing backend
- ⚠️ Big Bang: may need integration fixes in Phase 5

## Review Checklist
- [ ] All tasks completed
- [ ] Code follows project conventions
- [ ] No unintended side effects
- [ ] Build passes
- [ ] Tests pass (new + existing)

## Handoff to Next Phase
<!-- Filled in by the implementation agent after completing this phase. -->