feat(phase2): per-board access control UI

- BoardAccessControl component with user/group autocomplete
- BoardShareDialog modal with copy link, guest toggle, quick add
- Board permissions REST API (GET/POST/DELETE)
- Access indicators on BoardCard (lock, globe, shared icons)
- Guest access toggle in board editor with status preview
- Enhanced PermissionEditor with search autocomplete
- i18n translations for all new strings (EN/RU)

plans/phase-2-enhanced-features/CONTEXT.md

@@ -61,3 +61,19 @@ Admin settings page has a working "Test Connection" button for OAuth configurati
 - Translation key structure uses dot-notation grouped by feature: `nav.*`, `auth.*`, `board.*`, `section.*`, `widget.*`, `app.*`, `admin.*`, `search.*`, `common.*`, `status.*`, `theme.*`, `bg.*`, `sidebar.*`, `home.*`
 - All status labels (online/offline/degraded/unknown) are now translated via `$t('status.*')` in AppHealthBadge
 - Phase 4 widget type form labels (bookmark, note, embed, status fields) are partially untranslated — can be addressed in Phase 6
+
+## Phase 5 (Per-Board Access Control UI) — Completed
+
+- Created `src/lib/components/board/BoardAccessControl.svelte` — self-contained board permission manager with search/autocomplete for users and groups, fetches permissions from `/api/boards/[id]/permissions`
+- Created `src/lib/components/board/BoardShareDialog.svelte` — modal dialog with copy link, guest access toggle, quick permission grant, and current access list
+- Created `src/routes/api/boards/[id]/permissions/+server.ts` — REST endpoint for GET (list), POST (grant), DELETE (revoke) board permissions with proper auth checks
+- Enhanced `src/lib/components/admin/PermissionEditor.svelte` — replaced plain select dropdowns with search/autocomplete inputs (onfocus/onblur managed dropdowns)
+- Updated `src/lib/components/board/BoardCard.svelte` — added globe icon for guest-accessible boards, lock icon for private boards, users icon for boards with shared permissions
+- Updated `src/routes/boards/+page.server.ts` — computes `hasSharedPermissions` flag per board for access indicators
+- Updated `src/routes/boards/[boardId]/edit/+page.svelte` — added dedicated "Guest Access" section with status preview and "Permissions" section with `BoardAccessControl` component
+- Updated `src/routes/boards/[boardId]/edit/+page.server.ts` — loads users and groups for permission editor, computes `canManagePermissions` flag
+- Updated `src/lib/components/board/BoardHeader.svelte` — added "Share" button that triggers share dialog callback
+- Updated `src/routes/boards/[boardId]/+page.svelte` — integrated `BoardShareDialog` with guest toggle via PATCH API
+- Updated `src/routes/boards/[boardId]/+page.server.ts` — loads users/groups for share dialog when user can edit
+- Added ~20 new i18n keys (`board.access_*`, `board.share_*`, `board.guest_access_*`, `board.permissions_*`, `admin.perm_search_placeholder`) to both `en.json` and `ru.json`
+- Big Bang strategy: no build/test verification performed — Phase 6 integration may be needed

plans/phase-2-enhanced-features/PLAN.md

@@ -34,7 +34,7 @@ Add OAuth/Authentik integration, drag-and-drop reordering, localization (EN/RU),
 | Phase 2: DnD | frontend | Done | ⬜ | ⬜ | ⬜ |
 | Phase 3: Localization | fullstack | Done | ⬜ | ⬜ | ⬜ |
 | Phase 4: Widgets | fullstack | Done | ⬜ | ⬜ | ⬜ |
-| Phase 5: Access Control | fullstack | ⬜ Not Started | ⬜ | ⬜ | ⬜ |
+| Phase 5: Access Control | fullstack | Done | ⬜ | ⬜ | ⬜ |
 | Phase 6: Integration | fullstack | ⬜ Not Started | ⬜ | ⬜ | ⬜ |
 
 ## Final Review

plans/phase-2-enhanced-features/phase-5-access-control.md

@@ -1,6 +1,6 @@
 # Phase 4: Per-Board Access Control UI
 
-**Status:** ⬜ Not Started
+**Status:** Done
 **Parent plan:** [PLAN.md](./PLAN.md)
 **Domain:** fullstack
 
@@ -9,14 +9,14 @@ Add a user-friendly access control interface for boards, allowing admins to mana
 
 ## 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
+- [x] Task 1: Create `src/lib/components/board/BoardAccessControl.svelte` — inline permission editor for boards
+- [x] Task 2: Add access control tab/section to board editor page
+- [x] Task 3: Create `src/routes/api/boards/[id]/permissions/+server.ts` — GET/POST/DELETE permissions for a board
+- [x] Task 4: Update `src/lib/components/admin/PermissionEditor.svelte` — enhance with user/group search/autocomplete
+- [x] Task 5: Update `src/lib/components/board/BoardCard.svelte` — show access level indicator (icon/badge)
+- [x] Task 6: Update `src/routes/boards/+page.svelte` — show access indicators on board list
+- [x] Task 7: Add guest access toggle with preview description to board editor
+- [x] 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
@@ -26,7 +26,12 @@ Add a user-friendly access control interface for boards, allowing admins to mana
 - `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
+- `src/routes/boards/+page.svelte` — MODIFY (server only — +page.server.ts)
+- `src/routes/boards/[boardId]/+page.svelte` — MODIFY
+- `src/routes/boards/[boardId]/+page.server.ts` — MODIFY
+- `src/lib/components/board/BoardHeader.svelte` — MODIFY
+- `src/lib/i18n/en.json` — MODIFY
+- `src/lib/i18n/ru.json` — MODIFY
 
 ## Acceptance Criteria
 - Board editor has a permissions section for managing access
@@ -38,14 +43,24 @@ Add a user-friendly access control interface for boards, allowing admins to mana
 ## 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
+- ⚠️ Big Bang: may need integration fixes in Phase 6
 
 ## Review Checklist
-- [ ] All tasks completed
-- [ ] Code follows project conventions
+- [x] All tasks completed
+- [x] 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. -->
+- Created `BoardAccessControl.svelte` — self-contained board permission manager with search/autocomplete, fetches from `/api/boards/[id]/permissions`
+- Created `BoardShareDialog.svelte` — modal dialog for quick sharing with copy link, guest toggle, and permission management
+- Created `/api/boards/[id]/permissions` API endpoint with GET/POST/DELETE for board-scoped permissions
+- Enhanced `PermissionEditor.svelte` with search/autocomplete inputs replacing plain dropdowns
+- Updated `BoardCard.svelte` with globe (guest), lock (private), and users (shared) icons
+- Updated board editor with dedicated Guest Access and Permissions sections
+- Updated `BoardHeader.svelte` with Share button that opens the share dialog
+- Updated board view page (`[boardId]/+page.svelte`) and its server load to support share dialog with user/group data
+- Updated boards list server to compute `hasSharedPermissions` flag per board
+- Added ~20 new i18n keys in both `en.json` and `ru.json` for all new UI strings
+- Big Bang strategy: no build/test verification — Phase 6 integration may be needed

src/lib/components/admin/PermissionEditor.svelte

@@ -51,6 +51,10 @@
 	let selectedTargetType = $state<string>(TargetType.USER);
 	let selectedTargetId = $state('');
 	let selectedLevel = $state<string>(PermissionLevel.VIEW);
+	let entitySearchQuery = $state('');
+	let targetSearchQuery = $state('');
+	let showEntityDropdown = $state(false);
+	let showTargetDropdown = $state(false);
 
 	let entityOptions = $derived(
 		selectedEntityType === EntityType.APP ? apps : boards
@@ -60,6 +64,22 @@
 		selectedTargetType === TargetType.USER ? users : groups
 	);
 
+	let filteredEntityOptions = $derived(
+		entitySearchQuery.length > 0
+			? entityOptions.filter((opt) =>
+					opt.name.toLowerCase().includes(entitySearchQuery.toLowerCase())
+				)
+			: entityOptions
+	);
+
+	let filteredTargetOptions = $derived(
+		targetSearchQuery.length > 0
+			? targetOptions.filter((opt) =>
+					opt.name.toLowerCase().includes(targetSearchQuery.toLowerCase())
+				)
+			: targetOptions
+	);
+
 	function handleGrant() {
 		if (!selectedEntityId || !selectedTargetId) return;
 		onGrant({
@@ -71,6 +91,8 @@
 		});
 		selectedEntityId = '';
 		selectedTargetId = '';
+		entitySearchQuery = '';
+		targetSearchQuery = '';
 	}
 
 	function handleRevoke(perm: PermissionRecord) {
@@ -82,6 +104,18 @@
 		});
 	}
 
+	function selectEntity(option: SelectOption) {
+		selectedEntityId = option.id;
+		entitySearchQuery = option.name;
+		showEntityDropdown = false;
+	}
+
+	function selectTarget(option: SelectOption) {
+		selectedTargetId = option.id;
+		targetSearchQuery = option.name;
+		showTargetDropdown = false;
+	}
+
 	function getEntityName(entityType: string, entityId: string): string {
 		const list = entityType === EntityType.APP ? apps : boards;
 		return list.find((e) => e.id === entityId)?.name ?? entityId;
@@ -103,7 +137,7 @@
 				<select
 					id="perm-entity-type"
 					bind:value={selectedEntityType}
-					onchange={() => (selectedEntityId = '')}
+					onchange={() => { selectedEntityId = ''; entitySearchQuery = ''; }}
 					class="w-full rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground"
 				>
 					<option value={EntityType.BOARD}>{$t('admin.perm_board')}</option>
@@ -111,24 +145,38 @@
 				</select>
 			</div>
 			<div>
-				<label for="perm-entity" class="mb-1 block text-xs text-muted-foreground">{$t('admin.perm_entity')}</label>
-				<select
-					id="perm-entity"
-					bind:value={selectedEntityId}
-					class="w-full rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground"
+				<label for="perm-entity-search" class="mb-1 block text-xs text-muted-foreground">{$t('admin.perm_entity')}</label>
+				<div class="relative">
+					<input
+						id="perm-entity-search"
+						type="text"
+						bind:value={entitySearchQuery}
+						onfocus={() => { showEntityDropdown = true; }}
+						onblur={() => { setTimeout(() => { showEntityDropdown = false; }, 200); }}
+						placeholder={$t('admin.perm_search_placeholder')}
+						class="w-full rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground placeholder:text-muted-foreground"
+					/>
+					{#if showEntityDropdown && filteredEntityOptions.length > 0}
+						<div class="absolute z-10 mt-1 max-h-40 w-full overflow-y-auto rounded border border-border bg-card shadow-lg">
+							{#each filteredEntityOptions as option (option.id)}
+								<button
+									type="button"
+									class="w-full px-3 py-1.5 text-left text-sm text-foreground hover:bg-accent"
+									onmousedown={() => selectEntity(option)}
 								>
-					<option value="" disabled>{$t('admin.perm_select')}</option>
-					{#each entityOptions as option (option.id)}
-						<option value={option.id}>{option.name}</option>
+									{option.name}
+								</button>
 							{/each}
-				</select>
+						</div>
+					{/if}
+				</div>
 			</div>
 			<div>
 				<label for="perm-target-type" class="mb-1 block text-xs text-muted-foreground">{$t('admin.perm_target_type')}</label>
 				<select
 					id="perm-target-type"
 					bind:value={selectedTargetType}
-					onchange={() => (selectedTargetId = '')}
+					onchange={() => { selectedTargetId = ''; targetSearchQuery = ''; }}
 					class="w-full rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground"
 				>
 					<option value={TargetType.USER}>{$t('admin.perm_user')}</option>
@@ -136,17 +184,31 @@
 				</select>
 			</div>
 			<div>
-				<label for="perm-target" class="mb-1 block text-xs text-muted-foreground">{$t('admin.perm_target')}</label>
-				<select
-					id="perm-target"
-					bind:value={selectedTargetId}
-					class="w-full rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground"
+				<label for="perm-target-search" class="mb-1 block text-xs text-muted-foreground">{$t('admin.perm_target')}</label>
+				<div class="relative">
+					<input
+						id="perm-target-search"
+						type="text"
+						bind:value={targetSearchQuery}
+						onfocus={() => { showTargetDropdown = true; }}
+						onblur={() => { setTimeout(() => { showTargetDropdown = false; }, 200); }}
+						placeholder={$t('admin.perm_search_placeholder')}
+						class="w-full rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground placeholder:text-muted-foreground"
+					/>
+					{#if showTargetDropdown && filteredTargetOptions.length > 0}
+						<div class="absolute z-10 mt-1 max-h-40 w-full overflow-y-auto rounded border border-border bg-card shadow-lg">
+							{#each filteredTargetOptions as option (option.id)}
+								<button
+									type="button"
+									class="w-full px-3 py-1.5 text-left text-sm text-foreground hover:bg-accent"
+									onmousedown={() => selectTarget(option)}
 								>
-					<option value="" disabled>{$t('admin.perm_select')}</option>
-					{#each targetOptions as option (option.id)}
-						<option value={option.id}>{option.name}</option>
+									{option.name}
+								</button>
 							{/each}
-				</select>
+						</div>
+					{/if}
+				</div>
 			</div>
 			<div>
 				<label for="perm-level" class="mb-1 block text-xs text-muted-foreground">{$t('admin.perm_level')}</label>

src/lib/components/board/BoardAccessControl.svelte

@@ -0,0 +1,270 @@
+<script lang="ts">
+	import { t } from 'svelte-i18n';
+	import { TargetType, PermissionLevel } from '$lib/utils/constants.js';
+
+	interface PermissionRecord {
+		id: string;
+		entityType: string;
+		entityId: string;
+		targetType: string;
+		targetId: string;
+		level: string;
+		createdAt: string;
+	}
+
+	interface SelectOption {
+		id: string;
+		name: string;
+	}
+
+	interface Props {
+		boardId: string;
+		users: SelectOption[];
+		groups: SelectOption[];
+	}
+
+	let { boardId, users, groups }: Props = $props();
+
+	let permissions = $state<PermissionRecord[]>([]);
+	let loading = $state(true);
+	let errorMessage = $state('');
+
+	let selectedTargetType = $state<string>(TargetType.USER);
+	let selectedTargetId = $state('');
+	let selectedLevel = $state<string>(PermissionLevel.VIEW);
+	let searchQuery = $state('');
+
+	let targetOptions = $derived(
+		selectedTargetType === TargetType.USER ? users : groups
+	);
+
+	let filteredTargetOptions = $derived(
+		searchQuery.length > 0
+			? targetOptions.filter((opt) =>
+					opt.name.toLowerCase().includes(searchQuery.toLowerCase())
+				)
+			: targetOptions
+	);
+
+	async function loadPermissions() {
+		loading = true;
+		errorMessage = '';
+		try {
+			const res = await fetch(`/api/boards/${boardId}/permissions`);
+			const json = await res.json();
+			if (json.success) {
+				permissions = json.data;
+			} else {
+				errorMessage = json.error ?? 'Failed to load permissions';
+			}
+		} catch {
+			errorMessage = 'Network error';
+		} finally {
+			loading = false;
+		}
+	}
+
+	async function handleGrant() {
+		if (!selectedTargetId) return;
+		errorMessage = '';
+		try {
+			const res = await fetch(`/api/boards/${boardId}/permissions`, {
+				method: 'POST',
+				headers: { 'Content-Type': 'application/json' },
+				body: JSON.stringify({
+					targetType: selectedTargetType,
+					targetId: selectedTargetId,
+					level: selectedLevel
+				})
+			});
+			const json = await res.json();
+			if (json.success) {
+				selectedTargetId = '';
+				searchQuery = '';
+				await loadPermissions();
+			} else {
+				errorMessage = json.error ?? 'Failed to grant permission';
+			}
+		} catch {
+			errorMessage = 'Network error';
+		}
+	}
+
+	async function handleRevoke(perm: PermissionRecord) {
+		errorMessage = '';
+		try {
+			const res = await fetch(`/api/boards/${boardId}/permissions`, {
+				method: 'DELETE',
+				headers: { 'Content-Type': 'application/json' },
+				body: JSON.stringify({
+					targetType: perm.targetType,
+					targetId: perm.targetId
+				})
+			});
+			const json = await res.json();
+			if (json.success) {
+				await loadPermissions();
+			} else {
+				errorMessage = json.error ?? 'Failed to revoke permission';
+			}
+		} catch {
+			errorMessage = 'Network error';
+		}
+	}
+
+	function getTargetName(targetType: string, targetId: string): string {
+		const list = targetType === TargetType.USER ? users : groups;
+		return list.find((item) => item.id === targetId)?.name ?? targetId;
+	}
+
+	function getLevelLabel(level: string): string {
+		switch (level) {
+			case PermissionLevel.VIEW:
+				return $t('admin.perm_view');
+			case PermissionLevel.EDIT:
+				return $t('admin.perm_edit');
+			case PermissionLevel.ADMIN:
+				return $t('admin.perm_admin');
+			default:
+				return level;
+		}
+	}
+
+	function getTargetTypeLabel(targetType: string): string {
+		return targetType === TargetType.USER
+			? $t('admin.perm_user')
+			: $t('admin.perm_group');
+	}
+
+	// Load permissions on mount
+	$effect(() => {
+		loadPermissions();
+	});
+</script>
+
+<div class="space-y-4">
+	<!-- Grant form -->
+	<div class="rounded-lg border border-border bg-card p-4">
+		<h3 class="mb-3 text-sm font-semibold text-card-foreground">{$t('board.access_grant')}</h3>
+		<div class="grid grid-cols-1 gap-3 sm:grid-cols-4">
+			<div>
+				<label for="bac-target-type" class="mb-1 block text-xs text-muted-foreground">{$t('admin.perm_target_type')}</label>
+				<select
+					id="bac-target-type"
+					bind:value={selectedTargetType}
+					onchange={() => { selectedTargetId = ''; searchQuery = ''; }}
+					class="w-full rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground"
+				>
+					<option value={TargetType.USER}>{$t('admin.perm_user')}</option>
+					<option value={TargetType.GROUP}>{$t('admin.perm_group')}</option>
+				</select>
+			</div>
+			<div>
+				<label for="bac-target" class="mb-1 block text-xs text-muted-foreground">{$t('admin.perm_target')}</label>
+				<div class="relative">
+					<input
+						id="bac-target-search"
+						type="text"
+						bind:value={searchQuery}
+						placeholder={$t('board.access_search_placeholder')}
+						class="w-full rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground placeholder:text-muted-foreground"
+					/>
+					{#if searchQuery.length > 0 && filteredTargetOptions.length > 0}
+						<div class="absolute z-10 mt-1 max-h-40 w-full overflow-y-auto rounded border border-border bg-card shadow-lg">
+							{#each filteredTargetOptions as option (option.id)}
+								<button
+									type="button"
+									class="w-full px-3 py-1.5 text-left text-sm text-foreground hover:bg-accent"
+									onclick={() => { selectedTargetId = option.id; searchQuery = option.name; }}
+								>
+									{option.name}
+								</button>
+							{/each}
+						</div>
+					{/if}
+				</div>
+				{#if !searchQuery && targetOptions.length > 0}
+					<select
+						id="bac-target"
+						bind:value={selectedTargetId}
+						class="mt-1 w-full rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground"
+					>
+						<option value="" disabled>{$t('admin.perm_select')}</option>
+						{#each targetOptions as option (option.id)}
+							<option value={option.id}>{option.name}</option>
+						{/each}
+					</select>
+				{/if}
+			</div>
+			<div>
+				<label for="bac-level" class="mb-1 block text-xs text-muted-foreground">{$t('admin.perm_level')}</label>
+				<select
+					id="bac-level"
+					bind:value={selectedLevel}
+					class="w-full rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground"
+				>
+					<option value={PermissionLevel.VIEW}>{$t('admin.perm_view')}</option>
+					<option value={PermissionLevel.EDIT}>{$t('admin.perm_edit')}</option>
+					<option value={PermissionLevel.ADMIN}>{$t('admin.perm_admin')}</option>
+				</select>
+			</div>
+			<div class="flex items-end">
+				<button
+					type="button"
+					onclick={handleGrant}
+					disabled={!selectedTargetId}
+					class="w-full rounded bg-primary px-3 py-1.5 text-sm font-medium text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
+				>
+					{$t('admin.perm_grant')}
+				</button>
+			</div>
+		</div>
+	</div>
+
+	{#if errorMessage}
+		<p class="text-sm text-destructive">{errorMessage}</p>
+	{/if}
+
+	<!-- Existing permissions list -->
+	{#if loading}
+		<p class="text-sm text-muted-foreground">{$t('board.access_loading')}</p>
+	{:else if permissions.length > 0}
+		<div class="overflow-x-auto rounded-lg border border-border">
+			<table class="w-full text-left text-sm">
+				<thead class="border-b border-border bg-muted/50">
+					<tr>
+						<th class="px-4 py-2 text-xs font-medium text-muted-foreground">{$t('admin.perm_target_column')}</th>
+						<th class="px-4 py-2 text-xs font-medium text-muted-foreground">{$t('admin.perm_level_column')}</th>
+						<th class="px-4 py-2 text-xs font-medium text-muted-foreground">{$t('admin.perm_action_column')}</th>
+					</tr>
+				</thead>
+				<tbody>
+					{#each permissions as perm (perm.id)}
+						<tr class="border-b border-border last:border-b-0">
+							<td class="px-4 py-2 text-foreground">
+								<span class="mr-1 text-xs text-muted-foreground">{getTargetTypeLabel(perm.targetType)}:</span>
+								{getTargetName(perm.targetType, perm.targetId)}
+							</td>
+							<td class="px-4 py-2">
+								<span class="rounded-full bg-accent px-2 py-0.5 text-xs font-medium text-accent-foreground">
+									{getLevelLabel(perm.level)}
+								</span>
+							</td>
+							<td class="px-4 py-2">
+								<button
+									type="button"
+									onclick={() => handleRevoke(perm)}
+									class="text-xs text-destructive hover:underline"
+								>
+									{$t('admin.perm_revoke')}
+								</button>
+							</td>
+						</tr>
+					{/each}
+				</tbody>
+			</table>
+		</div>
+	{:else}
+		<p class="text-sm text-muted-foreground">{$t('board.access_none')}</p>
+	{/if}
+</div>

src/lib/components/board/BoardCard.svelte

@@ -10,6 +10,7 @@
 		isDefault: boolean;
 		isGuestAccessible: boolean;
 		_count?: { sections: number };
+		hasSharedPermissions?: boolean;
 	}
 
 	interface Props {
@@ -44,9 +45,31 @@
 					</span>
 				{/if}
 				{#if board.isGuestAccessible}
-					<span class="shrink-0 rounded bg-accent px-1.5 py-0.5 text-xs text-accent-foreground">
+					<span class="shrink-0 flex items-center gap-1 rounded bg-accent px-1.5 py-0.5 text-xs text-accent-foreground" title={$t('board.guest_accessible')}>
+						<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+							<circle cx="12" cy="12" r="10" />
+							<line x1="2" y1="12" x2="22" y2="12" />
+							<path d="M12 2a15.3 15.3 0 0 1 4 10 15.3 15.3 0 0 1-4 10 15.3 15.3 0 0 1-4-10 15.3 15.3 0 0 1 4-10z" />
+						</svg>
 						{$t('board.guest')}
 					</span>
+				{:else}
+					<span class="shrink-0 flex items-center gap-1 rounded bg-muted px-1.5 py-0.5 text-xs text-muted-foreground" title={$t('board.access_private')}>
+						<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+							<rect x="3" y="11" width="18" height="11" rx="2" ry="2" />
+							<path d="M7 11V7a5 5 0 0 1 10 0v4" />
+						</svg>
+					</span>
+				{/if}
+				{#if board.hasSharedPermissions}
+					<span class="shrink-0 flex items-center gap-1 rounded bg-blue-500/15 px-1.5 py-0.5 text-xs text-blue-500" title={$t('board.access_shared')}>
+						<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+							<path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2" />
+							<circle cx="9" cy="7" r="4" />
+							<path d="M23 21v-2a4 4 0 0 0-3-3.87" />
+							<path d="M16 3.13a4 4 0 0 1 0 7.75" />
+						</svg>
+					</span>
 				{/if}
 			</div>
 			{#if board.description}

src/lib/components/board/BoardHeader.svelte

@@ -8,9 +8,10 @@
 		icon: string | null;
 		boardId: string;
 		canEdit: boolean;
+		onShare?: () => void;
 	}
 
-	let { name, description, icon, boardId, canEdit }: Props = $props();
+	let { name, description, icon, boardId, canEdit, onShare }: Props = $props();
 </script>
 
 <div class="mb-6 flex items-start justify-between">
@@ -33,6 +34,22 @@
 		>
 			{$t('board.all_boards')}
 		</a>
+		{#if canEdit && onShare}
+			<button
+				type="button"
+				onclick={onShare}
+				class="flex items-center gap-1.5 rounded-lg border border-border px-3 py-2 text-sm text-foreground transition-colors hover:bg-accent"
+			>
+				<svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+					<circle cx="18" cy="5" r="3" />
+					<circle cx="6" cy="12" r="3" />
+					<circle cx="18" cy="19" r="3" />
+					<line x1="8.59" y1="13.51" x2="15.42" y2="17.49" />
+					<line x1="15.41" y1="6.51" x2="8.59" y2="10.49" />
+				</svg>
+				{$t('board.share')}
+			</button>
+		{/if}
 		{#if canEdit}
 			<a
 				href="/boards/{boardId}/edit"

src/lib/components/board/BoardShareDialog.svelte

@@ -0,0 +1,332 @@
+<script lang="ts">
+	import { t } from 'svelte-i18n';
+	import { TargetType, PermissionLevel } from '$lib/utils/constants.js';
+
+	interface PermissionRecord {
+		id: string;
+		entityType: string;
+		entityId: string;
+		targetType: string;
+		targetId: string;
+		level: string;
+		createdAt: string;
+	}
+
+	interface SelectOption {
+		id: string;
+		name: string;
+	}
+
+	interface Props {
+		boardId: string;
+		boardName: string;
+		isGuestAccessible: boolean;
+		users: SelectOption[];
+		groups: SelectOption[];
+		onClose: () => void;
+		onGuestToggle: (value: boolean) => void;
+	}
+
+	let {
+		boardId,
+		boardName,
+		isGuestAccessible,
+		users,
+		groups,
+		onClose,
+		onGuestToggle
+	}: Props = $props();
+
+	let permissions = $state<PermissionRecord[]>([]);
+	let loading = $state(true);
+	let errorMessage = $state('');
+	let copySuccess = $state(false);
+
+	let selectedTargetType = $state<string>(TargetType.USER);
+	let selectedTargetId = $state('');
+	let selectedLevel = $state<string>(PermissionLevel.VIEW);
+	let searchQuery = $state('');
+
+	let targetOptions = $derived(
+		selectedTargetType === TargetType.USER ? users : groups
+	);
+
+	let filteredTargetOptions = $derived(
+		searchQuery.length > 0
+			? targetOptions.filter((opt) =>
+					opt.name.toLowerCase().includes(searchQuery.toLowerCase())
+				)
+			: targetOptions
+	);
+
+	async function loadPermissions() {
+		loading = true;
+		errorMessage = '';
+		try {
+			const res = await fetch(`/api/boards/${boardId}/permissions`);
+			const json = await res.json();
+			if (json.success) {
+				permissions = json.data;
+			} else {
+				errorMessage = json.error ?? 'Failed to load permissions';
+			}
+		} catch {
+			errorMessage = 'Network error';
+		} finally {
+			loading = false;
+		}
+	}
+
+	async function handleGrant() {
+		if (!selectedTargetId) return;
+		errorMessage = '';
+		try {
+			const res = await fetch(`/api/boards/${boardId}/permissions`, {
+				method: 'POST',
+				headers: { 'Content-Type': 'application/json' },
+				body: JSON.stringify({
+					targetType: selectedTargetType,
+					targetId: selectedTargetId,
+					level: selectedLevel
+				})
+			});
+			const json = await res.json();
+			if (json.success) {
+				selectedTargetId = '';
+				searchQuery = '';
+				await loadPermissions();
+			} else {
+				errorMessage = json.error ?? 'Failed to grant permission';
+			}
+		} catch {
+			errorMessage = 'Network error';
+		}
+	}
+
+	async function handleRevoke(perm: PermissionRecord) {
+		errorMessage = '';
+		try {
+			const res = await fetch(`/api/boards/${boardId}/permissions`, {
+				method: 'DELETE',
+				headers: { 'Content-Type': 'application/json' },
+				body: JSON.stringify({
+					targetType: perm.targetType,
+					targetId: perm.targetId
+				})
+			});
+			const json = await res.json();
+			if (json.success) {
+				await loadPermissions();
+			} else {
+				errorMessage = json.error ?? 'Failed to revoke permission';
+			}
+		} catch {
+			errorMessage = 'Network error';
+		}
+	}
+
+	function getTargetName(targetType: string, targetId: string): string {
+		const list = targetType === TargetType.USER ? users : groups;
+		return list.find((item) => item.id === targetId)?.name ?? targetId;
+	}
+
+	function getLevelLabel(level: string): string {
+		switch (level) {
+			case PermissionLevel.VIEW:
+				return $t('admin.perm_view');
+			case PermissionLevel.EDIT:
+				return $t('admin.perm_edit');
+			case PermissionLevel.ADMIN:
+				return $t('admin.perm_admin');
+			default:
+				return level;
+		}
+	}
+
+	async function handleCopyLink() {
+		try {
+			const url = `${window.location.origin}/boards/${boardId}`;
+			await navigator.clipboard.writeText(url);
+			copySuccess = true;
+			setTimeout(() => {
+				copySuccess = false;
+			}, 2000);
+		} catch {
+			// Fallback: ignore if clipboard API not available
+		}
+	}
+
+	function handleBackdropClick(event: MouseEvent) {
+		if (event.target === event.currentTarget) {
+			onClose();
+		}
+	}
+
+	function handleKeydown(event: KeyboardEvent) {
+		if (event.key === 'Escape') {
+			onClose();
+		}
+	}
+
+	// Load permissions on mount
+	$effect(() => {
+		loadPermissions();
+	});
+</script>
+
+<svelte:window onkeydown={handleKeydown} />
+
+<!-- Backdrop -->
+<!-- svelte-ignore a11y_click_events_have_key_events a11y_no_static_element_interactions -->
+<div
+	class="fixed inset-0 z-50 flex items-center justify-center bg-black/50"
+	onclick={handleBackdropClick}
+>
+	<div class="mx-4 w-full max-w-lg rounded-xl border border-border bg-card p-6 shadow-xl" role="dialog" aria-modal="true">
+		<!-- Header -->
+		<div class="mb-4 flex items-center justify-between">
+			<h2 class="text-lg font-semibold text-card-foreground">
+				{$t('board.share_title', { values: { name: boardName } })}
+			</h2>
+			<button
+				type="button"
+				onclick={onClose}
+				class="rounded p-1 text-muted-foreground hover:bg-accent hover:text-foreground"
+				aria-label={$t('common.cancel')}
+			>
+				<svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+					<line x1="18" y1="6" x2="6" y2="18" />
+					<line x1="6" y1="6" x2="18" y2="18" />
+				</svg>
+			</button>
+		</div>
+
+		<!-- Copy link -->
+		<div class="mb-4 flex items-center gap-2">
+			<button
+				type="button"
+				onclick={handleCopyLink}
+				class="flex items-center gap-2 rounded-lg border border-border px-3 py-2 text-sm text-foreground transition-colors hover:bg-accent"
+			>
+				<svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+					<path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71" />
+					<path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71" />
+				</svg>
+				{copySuccess ? $t('board.share_copied') : $t('board.share_copy_link')}
+			</button>
+		</div>
+
+		<!-- Guest access toggle -->
+		<div class="mb-4 rounded-lg border border-border bg-muted/30 p-3">
+			<label class="flex items-center gap-3 text-sm text-foreground">
+				<input
+					type="checkbox"
+					checked={isGuestAccessible}
+					onchange={(e) => onGuestToggle(e.currentTarget.checked)}
+					class="h-4 w-4 rounded border-input accent-primary"
+				/>
+				<div>
+					<span class="font-medium">{$t('board.guest_accessible')}</span>
+					<p class="text-xs text-muted-foreground">{$t('board.share_guest_description')}</p>
+				</div>
+			</label>
+		</div>
+
+		<!-- Quick add permission -->
+		<div class="mb-4 rounded-lg border border-border p-3">
+			<h3 class="mb-2 text-sm font-medium text-card-foreground">{$t('board.share_add_access')}</h3>
+			<div class="flex gap-2">
+				<select
+					bind:value={selectedTargetType}
+					onchange={() => { selectedTargetId = ''; searchQuery = ''; }}
+					class="rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground"
+				>
+					<option value={TargetType.USER}>{$t('admin.perm_user')}</option>
+					<option value={TargetType.GROUP}>{$t('admin.perm_group')}</option>
+				</select>
+				<div class="relative flex-1">
+					<input
+						type="text"
+						bind:value={searchQuery}
+						placeholder={$t('board.access_search_placeholder')}
+						class="w-full rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground placeholder:text-muted-foreground"
+					/>
+					{#if searchQuery.length > 0 && filteredTargetOptions.length > 0 && !selectedTargetId}
+						<div class="absolute z-10 mt-1 max-h-32 w-full overflow-y-auto rounded border border-border bg-card shadow-lg">
+							{#each filteredTargetOptions as option (option.id)}
+								<button
+									type="button"
+									class="w-full px-3 py-1.5 text-left text-sm text-foreground hover:bg-accent"
+									onclick={() => { selectedTargetId = option.id; searchQuery = option.name; }}
+								>
+									{option.name}
+								</button>
+							{/each}
+						</div>
+					{/if}
+				</div>
+				<select
+					bind:value={selectedLevel}
+					class="rounded border border-input bg-background px-2 py-1.5 text-sm text-foreground"
+				>
+					<option value={PermissionLevel.VIEW}>{$t('admin.perm_view')}</option>
+					<option value={PermissionLevel.EDIT}>{$t('admin.perm_edit')}</option>
+					<option value={PermissionLevel.ADMIN}>{$t('admin.perm_admin')}</option>
+				</select>
+				<button
+					type="button"
+					onclick={handleGrant}
+					disabled={!selectedTargetId}
+					class="shrink-0 rounded bg-primary px-3 py-1.5 text-sm font-medium text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
+				>
+					{$t('common.add')}
+				</button>
+			</div>
+		</div>
+
+		{#if errorMessage}
+			<p class="mb-3 text-sm text-destructive">{errorMessage}</p>
+		{/if}
+
+		<!-- Current access list -->
+		<div class="max-h-48 overflow-y-auto">
+			{#if loading}
+				<p class="text-sm text-muted-foreground">{$t('board.access_loading')}</p>
+			{:else if permissions.length > 0}
+				<h3 class="mb-2 text-sm font-medium text-card-foreground">{$t('board.share_current_access')}</h3>
+				<div class="space-y-1">
+					{#each permissions as perm (perm.id)}
+						<div class="flex items-center justify-between rounded px-2 py-1.5 hover:bg-muted/50">
+							<div class="flex items-center gap-2 text-sm">
+								<svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="text-muted-foreground">
+									{#if perm.targetType === TargetType.USER}
+										<path d="M19 21v-2a4 4 0 0 0-4-4H9a4 4 0 0 0-4 4v2" />
+										<circle cx="12" cy="7" r="4" />
+									{:else}
+										<path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2" />
+										<circle cx="9" cy="7" r="4" />
+										<path d="M23 21v-2a4 4 0 0 0-3-3.87" />
+										<path d="M16 3.13a4 4 0 0 1 0 7.75" />
+									{/if}
+								</svg>
+								<span class="text-foreground">{getTargetName(perm.targetType, perm.targetId)}</span>
+								<span class="rounded-full bg-accent px-2 py-0.5 text-xs text-accent-foreground">
+									{getLevelLabel(perm.level)}
+								</span>
+							</div>
+							<button
+								type="button"
+								onclick={() => handleRevoke(perm)}
+								class="text-xs text-destructive hover:underline"
+							>
+								{$t('admin.perm_revoke')}
+							</button>
+						</div>
+					{/each}
+				</div>
+			{:else}
+				<p class="text-sm text-muted-foreground">{$t('board.access_none')}</p>
+			{/if}
+		</div>
+	</div>
+</div>

src/lib/i18n/en.json

@@ -52,6 +52,25 @@
   "board.creating": "Creating...",
   "board.default_board": "Default board",
   "board.guest_accessible": "Guest accessible",
+  "board.guest_access_title": "Guest Access",
+  "board.guest_access_description": "When enabled, this board is visible to unauthenticated visitors without requiring sign-in.",
+  "board.guest_access_enabled": "This board is publicly accessible",
+  "board.guest_access_disabled": "This board is private",
+  "board.permissions_title": "Permissions",
+  "board.permissions_description": "Manage who can view, edit, or administer this board.",
+  "board.access_grant": "Grant Access",
+  "board.access_search_placeholder": "Search...",
+  "board.access_loading": "Loading permissions...",
+  "board.access_none": "No permissions configured for this board.",
+  "board.access_private": "Private",
+  "board.access_shared": "Shared",
+  "board.share": "Share",
+  "board.share_title": "Share \"{name}\"",
+  "board.share_copy_link": "Copy Link",
+  "board.share_copied": "Copied!",
+  "board.share_guest_description": "Anyone with the link can view this board without signing in.",
+  "board.share_add_access": "Add People or Groups",
+  "board.share_current_access": "Current Access",
 
   "section.title_label": "Title",
   "section.icon_label": "Icon",
@@ -192,6 +211,7 @@
   "admin.perm_level_column": "Level",
   "admin.perm_action_column": "Action",
   "admin.perm_none": "No permissions configured.",
+  "admin.perm_search_placeholder": "Type to search...",
 
   "search.placeholder": "Search apps and boards...",
   "search.trigger": "Search...",

src/lib/i18n/ru.json

@@ -52,6 +52,25 @@
   "board.creating": "\u0421\u043e\u0437\u0434\u0430\u043d\u0438\u0435...",
   "board.default_board": "\u0414\u043e\u0441\u043a\u0430 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e",
   "board.guest_accessible": "\u0414\u043e\u0441\u0442\u0443\u043f\u043d\u0430 \u0433\u043e\u0441\u0442\u044f\u043c",
+  "board.guest_access_title": "\u0413\u043e\u0441\u0442\u0435\u0432\u043e\u0439 \u0434\u043e\u0441\u0442\u0443\u043f",
+  "board.guest_access_description": "\u041f\u0440\u0438 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0438 \u044d\u0442\u0430 \u0434\u043e\u0441\u043a\u0430 \u0432\u0438\u0434\u043d\u0430 \u043d\u0435\u0430\u0432\u0442\u043e\u0440\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u043c \u043f\u043e\u0441\u0435\u0442\u0438\u0442\u0435\u043b\u044f\u043c \u0431\u0435\u0437 \u0432\u0445\u043e\u0434\u0430 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0443.",
+  "board.guest_access_enabled": "\u042d\u0442\u0430 \u0434\u043e\u0441\u043a\u0430 \u043e\u0431\u0449\u0435\u0434\u043e\u0441\u0442\u0443\u043f\u043d\u0430",
+  "board.guest_access_disabled": "\u042d\u0442\u0430 \u0434\u043e\u0441\u043a\u0430 \u043f\u0440\u0438\u0432\u0430\u0442\u043d\u0430",
+  "board.permissions_title": "\u041f\u0440\u0430\u0432\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u0430",
+  "board.permissions_description": "\u0423\u043f\u0440\u0430\u0432\u043b\u044f\u0439\u0442\u0435, \u043a\u0442\u043e \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u043e\u0441\u043c\u0430\u0442\u0440\u0438\u0432\u0430\u0442\u044c, \u0440\u0435\u0434\u0430\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0438\u043b\u0438 \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u044d\u0442\u0443 \u0434\u043e\u0441\u043a\u0443.",
+  "board.access_grant": "\u041d\u0430\u0437\u043d\u0430\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f",
+  "board.access_search_placeholder": "\u041f\u043e\u0438\u0441\u043a...",
+  "board.access_loading": "\u0417\u0430\u0433\u0440\u0443\u0437\u043a\u0430 \u043f\u0440\u0430\u0432...",
+  "board.access_none": "\u041f\u0440\u0430\u0432\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u0434\u043b\u044f \u044d\u0442\u043e\u0439 \u0434\u043e\u0441\u043a\u0438 \u043d\u0435 \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043d\u044b.",
+  "board.access_private": "\u041f\u0440\u0438\u0432\u0430\u0442\u043d\u0430\u044f",
+  "board.access_shared": "\u041e\u0431\u0449\u0430\u044f",
+  "board.share": "\u041f\u043e\u0434\u0435\u043b\u0438\u0442\u044c\u0441\u044f",
+  "board.share_title": "\u041f\u043e\u0434\u0435\u043b\u0438\u0442\u044c\u0441\u044f \u00ab{name}\u00bb",
+  "board.share_copy_link": "\u041a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0441\u0441\u044b\u043b\u043a\u0443",
+  "board.share_copied": "\u0421\u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u043d\u043e!",
+  "board.share_guest_description": "\u041b\u044e\u0431\u043e\u0439 \u0441 \u044d\u0442\u043e\u0439 \u0441\u0441\u044b\u043b\u043a\u043e\u0439 \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u043e\u0441\u043c\u0430\u0442\u0440\u0438\u0432\u0430\u0442\u044c \u0434\u043e\u0441\u043a\u0443 \u0431\u0435\u0437 \u0432\u0445\u043e\u0434\u0430.",
+  "board.share_add_access": "\u0414\u043e\u0431\u0430\u0432\u0438\u0442\u044c \u043b\u044e\u0434\u0435\u0439 \u0438\u043b\u0438 \u0433\u0440\u0443\u043f\u043f\u044b",
+  "board.share_current_access": "\u0422\u0435\u043a\u0443\u0449\u0438\u0439 \u0434\u043e\u0441\u0442\u0443\u043f",
 
   "section.title_label": "\u0417\u0430\u0433\u043e\u043b\u043e\u0432\u043e\u043a",
   "section.icon_label": "\u0418\u043a\u043e\u043d\u043a\u0430",
@@ -192,6 +211,7 @@
   "admin.perm_level_column": "\u0423\u0440\u043e\u0432\u0435\u043d\u044c",
   "admin.perm_action_column": "\u0414\u0435\u0439\u0441\u0442\u0432\u0438\u0435",
   "admin.perm_none": "\u041f\u0440\u0430\u0432\u0430 \u043d\u0435 \u043d\u0430\u0441\u0442\u0440\u043e\u0435\u043d\u044b.",
+  "admin.perm_search_placeholder": "\u041d\u0430\u0447\u043d\u0438\u0442\u0435 \u0432\u0432\u043e\u0434\u0438\u0442\u044c...",
 
   "search.placeholder": "\u041f\u043e\u0438\u0441\u043a \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0438 \u0434\u043e\u0441\u043e\u043a...",
   "search.trigger": "\u041f\u043e\u0438\u0441\u043a...",

src/routes/api/boards/[id]/permissions/+server.ts

@@ -0,0 +1,175 @@
+import { json } from '@sveltejs/kit';
+import type { RequestHandler } from './$types';
+import * as permissionService from '$lib/server/services/permissionService.js';
+import { success, error } from '$lib/server/utils/response.js';
+import { EntityType, PermissionLevel, TargetType, UserRole } from '$lib/utils/constants.js';
+
+/**
+ * GET /api/boards/:id/permissions — List all permissions for a board.
+ * Requires edit+ permission on the board, or admin role.
+ */
+export const GET: RequestHandler = async (event) => {
+	const user = event.locals.user;
+	if (!user) {
+		return json(error('Authentication required'), { status: 401 });
+	}
+
+	const { id } = event.params;
+
+	// Only admins or users with edit+ permission can view board permissions
+	if (user.role !== UserRole.ADMIN) {
+		const result = await permissionService.checkPermission(
+			EntityType.BOARD,
+			id,
+			user.id,
+			PermissionLevel.EDIT
+		);
+		if (!result.hasPermission) {
+			return json(error('Insufficient permissions'), { status: 403 });
+		}
+	}
+
+	try {
+		const permissions = await permissionService.getPermissionsForEntity(EntityType.BOARD, id);
+		return json(success(permissions));
+	} catch (err) {
+		const message = err instanceof Error ? err.message : 'Failed to fetch permissions';
+		return json(error(message), { status: 500 });
+	}
+};
+
+/**
+ * POST /api/boards/:id/permissions — Grant a permission on a board.
+ * Body: { targetType: 'user' | 'group', targetId: string, level: 'view' | 'edit' | 'admin' }
+ * Requires admin permission on the board, or admin role.
+ */
+export const POST: RequestHandler = async (event) => {
+	const user = event.locals.user;
+	if (!user) {
+		return json(error('Authentication required'), { status: 401 });
+	}
+
+	const { id } = event.params;
+
+	// Only admins or users with admin permission on the board can grant permissions
+	if (user.role !== UserRole.ADMIN) {
+		const result = await permissionService.checkPermission(
+			EntityType.BOARD,
+			id,
+			user.id,
+			PermissionLevel.ADMIN
+		);
+		if (!result.hasPermission) {
+			return json(error('Insufficient permissions'), { status: 403 });
+		}
+	}
+
+	let body: unknown;
+	try {
+		body = await event.request.json();
+	} catch {
+		return json(error('Invalid JSON body'), { status: 400 });
+	}
+
+	const { targetType, targetId, level } = body as {
+		targetType?: string;
+		targetId?: string;
+		level?: string;
+	};
+
+	// Validate targetType
+	if (!targetType || ![TargetType.USER, TargetType.GROUP].includes(targetType as TargetType)) {
+		return json(error('Invalid targetType: must be "user" or "group"'), { status: 400 });
+	}
+
+	// Validate targetId
+	if (!targetId || typeof targetId !== 'string') {
+		return json(error('targetId is required'), { status: 400 });
+	}
+
+	// Validate level
+	if (
+		!level ||
+		![PermissionLevel.VIEW, PermissionLevel.EDIT, PermissionLevel.ADMIN].includes(
+			level as PermissionLevel
+		)
+	) {
+		return json(error('Invalid level: must be "view", "edit", or "admin"'), { status: 400 });
+	}
+
+	try {
+		const permission = await permissionService.grantPermission({
+			entityType: EntityType.BOARD,
+			entityId: id,
+			targetType: targetType as TargetType,
+			targetId,
+			level: level as PermissionLevel
+		});
+		return json(success(permission), { status: 201 });
+	} catch (err) {
+		const message = err instanceof Error ? err.message : 'Failed to grant permission';
+		return json(error(message), { status: 500 });
+	}
+};
+
+/**
+ * DELETE /api/boards/:id/permissions — Revoke a permission on a board.
+ * Body: { targetType: 'user' | 'group', targetId: string }
+ * Requires admin permission on the board, or admin role.
+ */
+export const DELETE: RequestHandler = async (event) => {
+	const user = event.locals.user;
+	if (!user) {
+		return json(error('Authentication required'), { status: 401 });
+	}
+
+	const { id } = event.params;
+
+	// Only admins or users with admin permission on the board can revoke permissions
+	if (user.role !== UserRole.ADMIN) {
+		const result = await permissionService.checkPermission(
+			EntityType.BOARD,
+			id,
+			user.id,
+			PermissionLevel.ADMIN
+		);
+		if (!result.hasPermission) {
+			return json(error('Insufficient permissions'), { status: 403 });
+		}
+	}
+
+	let body: unknown;
+	try {
+		body = await event.request.json();
+	} catch {
+		return json(error('Invalid JSON body'), { status: 400 });
+	}
+
+	const { targetType, targetId } = body as {
+		targetType?: string;
+		targetId?: string;
+	};
+
+	// Validate targetType
+	if (!targetType || ![TargetType.USER, TargetType.GROUP].includes(targetType as TargetType)) {
+		return json(error('Invalid targetType: must be "user" or "group"'), { status: 400 });
+	}
+
+	// Validate targetId
+	if (!targetId || typeof targetId !== 'string') {
+		return json(error('targetId is required'), { status: 400 });
+	}
+
+	try {
+		await permissionService.revokePermission(
+			EntityType.BOARD,
+			id,
+			targetType as TargetType,
+			targetId
+		);
+		return json(success(null));
+	} catch (err) {
+		const message = err instanceof Error ? err.message : 'Failed to revoke permission';
+		return json(error(message), { status: 500 });
+	}
+};

src/routes/boards/+page.server.ts

@@ -19,7 +19,20 @@ export const load: PageServerLoad = async ({ locals }) => {
 
 	if (user.role === UserRole.ADMIN) {
 		const boards = await boardService.findAllBoards();
-		return { boards, isGuest: false };
+		// For admins, check which boards have shared permissions
+		const boardsWithShared = await Promise.all(
+			boards.map(async (board) => {
+				const permissions = await permissionService.getPermissionsForEntity(
+					EntityType.BOARD,
+					board.id
+				);
+				return {
+					...board,
+					hasSharedPermissions: permissions.length > 0
+				};
+			})
+		);
+		return { boards: boardsWithShared, isGuest: false };
 	}
 
 	// Regular user: filter by permissions
@@ -28,7 +41,7 @@ export const load: PageServerLoad = async ({ locals }) => {
 
 	for (const board of allBoards) {
 		if (board.isGuestAccessible) {
-			accessibleBoards.push(board);
+			accessibleBoards.push({ ...board, hasSharedPermissions: false });
 			continue;
 		}
 
@@ -40,7 +53,14 @@ export const load: PageServerLoad = async ({ locals }) => {
 		);
 
 		if (result.hasPermission) {
-			accessibleBoards.push(board);
+			const permissions = await permissionService.getPermissionsForEntity(
+				EntityType.BOARD,
+				board.id
+			);
+			accessibleBoards.push({
+				...board,
+				hasSharedPermissions: permissions.length > 0
+			});
 		}
 	}
 

src/routes/boards/[boardId]/+page.server.ts

@@ -3,6 +3,8 @@ import type { PageServerLoad } from './$types.js';
 import * as boardService from '$lib/server/services/boardService.js';
 import * as appService from '$lib/server/services/appService.js';
 import * as permissionService from '$lib/server/services/permissionService.js';
+import * as userService from '$lib/server/services/userService.js';
+import * as groupService from '$lib/server/services/groupService.js';
 import { EntityType, PermissionLevel, UserRole } from '$lib/utils/constants.js';
 import { isBoardGuestAccessible } from '$lib/server/middleware/guestAccess.js';
 
@@ -54,7 +56,26 @@ export const load: PageServerLoad = async ({ params, locals }) => {
 			}
 		}
 
-		return { board, canEdit, allApps };
+		// Load users and groups for the share dialog (only if user can edit)
+		let users: { id: string; name: string }[] = [];
+		let groups: { id: string; name: string }[] = [];
+
+		if (canEdit) {
+			const [allUsers, allGroups] = await Promise.all([
+				userService.findAll(),
+				groupService.findAll()
+			]);
+			users = allUsers.map((u) => ({
+				id: u.id,
+				name: u.displayName || u.email
+			}));
+			groups = allGroups.map((g) => ({
+				id: g.id,
+				name: g.name
+			}));
+		}
+
+		return { board, canEdit, allApps, users, groups };
 	} catch (err) {
 		const message = err instanceof Error ? err.message : 'Board not found';
 		if (message.includes('not found')) {

src/routes/boards/[boardId]/+page.svelte

@@ -3,8 +3,23 @@
 	import type { PageData } from './$types.js';
 	import Board from '$lib/components/board/Board.svelte';
 	import BoardHeader from '$lib/components/board/BoardHeader.svelte';
+	import BoardShareDialog from '$lib/components/board/BoardShareDialog.svelte';
 
 	let { data }: { data: PageData } = $props();
+
+	let showShareDialog = $state(false);
+
+	async function handleGuestToggle(value: boolean) {
+		try {
+			await fetch(`/api/boards/${data.board.id}`, {
+				method: 'PATCH',
+				headers: { 'Content-Type': 'application/json' },
+				body: JSON.stringify({ isGuestAccessible: value })
+			});
+		} catch (err) {
+			console.error('Failed to update guest access:', err);
+		}
+	}
 </script>
 
 <svelte:head>
@@ -19,8 +34,21 @@
 			icon={data.board.icon}
 			boardId={data.board.id}
 			canEdit={data.canEdit}
+			onShare={() => { showShareDialog = true; }}
 		/>
 
 		<Board sections={data.board.sections} allApps={data.allApps} />
 	</div>
 </div>
+
+{#if showShareDialog && data.canEdit}
+	<BoardShareDialog
+		boardId={data.board.id}
+		boardName={data.board.name}
+		isGuestAccessible={data.board.isGuestAccessible}
+		users={data.users ?? []}
+		groups={data.groups ?? []}
+		onClose={() => { showShareDialog = false; }}
+		onGuestToggle={handleGuestToggle}
+	/>
+{/if}

src/routes/boards/[boardId]/edit/+page.server.ts

@@ -3,6 +3,8 @@ import type { PageServerLoad, Actions } from './$types.js';
 import * as boardService from '$lib/server/services/boardService.js';
 import * as appService from '$lib/server/services/appService.js';
 import * as permissionService from '$lib/server/services/permissionService.js';
+import * as userService from '$lib/server/services/userService.js';
+import * as groupService from '$lib/server/services/groupService.js';
 import { requireAuth } from '$lib/server/middleware/authenticate.js';
 import { EntityType, PermissionLevel, UserRole } from '$lib/utils/constants.js';
 import {
@@ -30,10 +32,44 @@ export const load: PageServerLoad = async (event) => {
 	}
 
 	try {
-		const board = await boardService.findBoardById(boardId);
-		const apps = await appService.findAll();
+		const [board, apps, allUsers, allGroups] = await Promise.all([
+			boardService.findBoardById(boardId),
+			appService.findAll(),
+			userService.findAll(),
+			groupService.findAll()
+		]);
 
-		return { board, apps };
+		// Determine if user has admin permission on this board (for showing permissions section)
+		let canManagePermissions = false;
+		if (user.role === UserRole.ADMIN) {
+			canManagePermissions = true;
+		} else {
+			const adminResult = await permissionService.checkPermission(
+				EntityType.BOARD,
+				boardId,
+				user.id,
+				PermissionLevel.ADMIN
+			);
+			canManagePermissions = adminResult.hasPermission;
+		}
+
+		const userOptions = allUsers.map((u) => ({
+			id: u.id,
+			name: u.displayName || u.email
+		}));
+
+		const groupOptions = allGroups.map((g) => ({
+			id: g.id,
+			name: g.name
+		}));
+
+		return {
+			board,
+			apps,
+			users: userOptions,
+			groups: groupOptions,
+			canManagePermissions
+		};
 	} catch (err) {
 		const message = err instanceof Error ? err.message : 'Board not found';
 		if (message.includes('not found')) {

src/routes/boards/[boardId]/edit/+page.svelte

@@ -4,6 +4,7 @@
 	import { enhance } from '$app/forms';
 	import { invalidateAll } from '$app/navigation';
 	import DraggableBoard from '$lib/components/board/DraggableBoard.svelte';
+	import BoardAccessControl from '$lib/components/board/BoardAccessControl.svelte';
 	import { WidgetType } from '$lib/utils/constants.js';
 
 	let { data }: { data: PageData } = $props();
@@ -161,15 +162,6 @@
 							/>
 							{$t('board.default_board')}
 						</label>
-						<label class="flex items-center gap-2 text-sm text-foreground">
-							<input
-								type="checkbox"
-								name="isGuestAccessible"
-								checked={data.board.isGuestAccessible}
-								class="h-4 w-4 rounded border-input accent-primary"
-							/>
-							{$t('board.guest_accessible')}
-						</label>
 					</div>
 				</div>
 				<div class="mt-4">
@@ -183,6 +175,68 @@
 			</form>
 		</section>
 
+		<!-- Guest Access -->
+		<section class="mb-8 rounded-xl border border-border bg-card p-6 shadow-sm">
+			<h2 class="mb-4 text-lg font-semibold text-card-foreground">{$t('board.guest_access_title')}</h2>
+			<div class="rounded-lg border border-border bg-muted/30 p-4">
+				<form method="POST" action="?/updateBoard" use:enhance>
+					<input type="hidden" name="name" value={data.board.name} />
+					<input type="hidden" name="isDefault" value={data.board.isDefault ? 'on' : ''} />
+					<label class="flex items-start gap-3 text-sm text-foreground">
+						<input
+							type="checkbox"
+							name="isGuestAccessible"
+							checked={data.board.isGuestAccessible}
+							class="mt-0.5 h-4 w-4 rounded border-input accent-primary"
+						/>
+						<div>
+							<span class="font-medium">{$t('board.guest_accessible')}</span>
+							<p class="mt-1 text-xs text-muted-foreground">{$t('board.guest_access_description')}</p>
+							{#if data.board.isGuestAccessible}
+								<p class="mt-1 flex items-center gap-1 text-xs text-green-500">
+									<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+										<circle cx="12" cy="12" r="10" />
+										<line x1="2" y1="12" x2="22" y2="12" />
+										<path d="M12 2a15.3 15.3 0 0 1 4 10 15.3 15.3 0 0 1-4 10 15.3 15.3 0 0 1-4-10 15.3 15.3 0 0 1 4-10z" />
+									</svg>
+									{$t('board.guest_access_enabled')}
+								</p>
+							{:else}
+								<p class="mt-1 flex items-center gap-1 text-xs text-muted-foreground">
+									<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+										<rect x="3" y="11" width="18" height="11" rx="2" ry="2" />
+										<path d="M7 11V7a5 5 0 0 1 10 0v4" />
+									</svg>
+									{$t('board.guest_access_disabled')}
+								</p>
+							{/if}
+						</div>
+					</label>
+					<div class="mt-3">
+						<button
+							type="submit"
+							class="rounded-lg bg-primary px-4 py-2 text-sm font-medium text-primary-foreground transition-colors hover:bg-primary/90"
+						>
+							{$t('board.save')}
+						</button>
+					</div>
+				</form>
+			</div>
+		</section>
+
+		<!-- Permissions -->
+		{#if data.canManagePermissions}
+			<section class="mb-8 rounded-xl border border-border bg-card p-6 shadow-sm">
+				<h2 class="mb-4 text-lg font-semibold text-card-foreground">{$t('board.permissions_title')}</h2>
+				<p class="mb-4 text-sm text-muted-foreground">{$t('board.permissions_description')}</p>
+				<BoardAccessControl
+					boardId={data.board.id}
+					users={data.users}
+					groups={data.groups}
+				/>
+			</section>
+		{/if}
+
 		<!-- Sections with Drag-and-Drop -->
 		<section class="mb-8">
 			<div class="mb-4 flex items-center justify-between">