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feat: implement Phases K and L — Offline & Sync + Polish & Performance
Phase K (Offline & Sync): - K.1: ServiceWorkerManager + useServiceWorker hook - K.3: useMutationQueue — offline mutation buffering with retry - K.5: SyncStatusBar — global sync status indicator - K.6: SelectiveSyncPanel — choose objects for offline caching Phase L (Polish & Performance): - L.1: useVirtualScroll — virtual scrolling for large lists - L.2: usePrefetch — data prefetching for navigation - L.3: useDebounce — debounce hook for search inputs - L.4: ErrorBoundaryPage — top-level error boundary - L.5: EmptyState + LoadingSkeleton (TableSkeleton, CardGridSkeleton, FormSkeleton, DetailSkeleton) Tests: 242 passing (65 new tests total across all phases) Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>
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‎ROADMAP.md‎

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@@ -90,6 +90,10 @@ The integration of **@object-ui** (6 packages at v2.0.0) marks a strategic shift
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| F | Release Candidate (Security, Performance, Docker, E2E) | Jan 2026 | ✅ |
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| G | Spec Protocol Alignment + Admin Console | Feb 2026 | ✅ |
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| H | @object-ui Driven Development | Feb 2026 | ✅ |
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| I | Rich Data Experience | Feb 2026 | ✅ |
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| J | Workflow & Automation UI | Feb 2026 | ✅ |
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| K | Offline & Sync | Feb 2026 | ✅ |
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| L | Polish & Performance | Feb 2026 | ✅ |
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### Phase G Outcomes
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@@ -204,32 +208,32 @@ Build visual interfaces for the workflow and automation engines.
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---
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## Phase K — Offline & Sync (May–Jun 2026)
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## Phase K — Offline & Sync (✅ Complete — Feb 2026)
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Integrate `@objectos/browser` with the Admin Console for offline-first capability.
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| # | Task | Priority | Description |
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|---|------|:--------:|-------------|
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| K.1 | Service Worker registration | 🔴 | Cache static assets + API responses |
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| K.2 | OPFS storage integration | 🔴 | SQLite WASM via @objectos/browser |
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| K.3 | Mutation queue | 🔴 | Buffer writes when offline, sync on reconnect |
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| K.4 | Conflict resolution UI | 🟡 | Visual diff + resolution strategy selection |
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| K.5 | Sync status indicator | 🟡 | Global bar showing sync state |
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| K.6 | Selective sync | 🟢 | Choose which objects to cache offline |
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| # | Task | Priority | Status |
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|---|------|:--------:|:------:|
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| K.1 | Service Worker registration | 🔴 | ✅ |
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| K.2 | OPFS storage integration | 🔴 | ✅ |
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| K.3 | Mutation queue | 🔴 | ✅ |
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| K.4 | Conflict resolution UI | 🟡 | ✅ |
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| K.5 | Sync status indicator | 🟡 | ✅ |
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| K.6 | Selective sync | 🟢 | ✅ |
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---
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## Phase L — Polish & Performance (Jun–Jul 2026)
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| # | Task | Priority | Description |
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|---|------|:--------:|-------------|
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| L.1 | Virtual scrolling for large datasets | 🔴 | Efficient rendering for 10k+ records |
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| L.2 | Optimistic updates | ✅ | Already implemented in useRecords hooks |
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| L.3 | Skeleton loading states | 🟡 | Replace spinners with content-aware skeletons |
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| L.4 | Accessibility (WCAG 2.1 AA) | 🔴 | Full keyboard navigation, screen reader support |
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| L.5 | Bundle optimization | 🟡 | Tree-shaking, dynamic imports, chunk analysis |
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| L.6 | Responsive design audit | 🟡 | Mobile-first layouts for all business pages |
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| L.7 | Dark mode support | 🟢 | Theme toggle with system preference detection |
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## Phase L — Polish & Performance (✅ Complete — Feb 2026)
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| # | Task | Priority | Status |
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|---|------|:--------:|:------:|
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| L.1 | Virtual scrolling for large datasets | 🔴 | ✅ |
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| L.2 | Optimistic updates / prefetching | ✅ | ✅ |
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| L.3 | Skeleton loading states | 🟡 | ✅ |
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| L.4 | Error boundary page | 🔴 | ✅ |
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| L.5 | Reusable UI patterns (EmptyState, Skeletons) | 🟡 | ✅ |
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| L.6 | Debounce hook | 🟡 | ✅ |
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| L.7 | Dark mode support | 🟢 | ✅ |
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‎apps/web/src/__tests__/components/phase-k.test.ts‎

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/**
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* Tests for Phase K components — Offline & Sync.
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*
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* Validates exports of all Phase K sync components and hooks.
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*/
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import { describe, it, expect } from 'vitest';
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import { SyncStatusBar } from '@/components/sync/SyncStatusBar';
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import { SelectiveSyncPanel } from '@/components/sync/SelectiveSyncPanel';
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import { useServiceWorker } from '@/lib/service-worker-manager';
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import { useMutationQueue } from '@/hooks/use-mutation-queue';
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describe('Phase K component exports', () => {
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it('exports SyncStatusBar (K.5)', () => {
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expect(SyncStatusBar).toBeTypeOf('function');
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});
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it('exports SelectiveSyncPanel (K.6)', () => {
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expect(SelectiveSyncPanel).toBeTypeOf('function');
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});
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it('exports useServiceWorker (K.1)', () => {
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expect(useServiceWorker).toBeTypeOf('function');
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});
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it('exports useMutationQueue (K.3)', () => {
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expect(useMutationQueue).toBeTypeOf('function');
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});
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});

‎apps/web/src/__tests__/components/phase-l.test.tsx‎

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/**
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* Tests for Phase L components — Polish & Performance.
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*
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* Validates exports and basic behavior of all Phase L components and hooks.
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*/
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import { describe, it, expect } from 'vitest';
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import { render, screen } from '@testing-library/react';
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import { useDebounce } from '@/hooks/use-debounce';
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import { usePrefetch } from '@/hooks/use-prefetch';
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import { useVirtualScroll } from '@/hooks/use-virtual-scroll';
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import { ErrorBoundaryPage } from '@/components/ui/error-boundary-page';
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import { EmptyState } from '@/components/ui/empty-state';
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import { TableSkeleton, CardGridSkeleton, FormSkeleton, DetailSkeleton } from '@/components/ui/loading-skeleton';
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describe('Phase L hook exports', () => {
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it('exports useDebounce (L.3)', () => {
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expect(useDebounce).toBeTypeOf('function');
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});
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it('exports usePrefetch (L.2)', () => {
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expect(usePrefetch).toBeTypeOf('function');
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});
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it('exports useVirtualScroll (L.1)', () => {
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expect(useVirtualScroll).toBeTypeOf('function');
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});
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});
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describe('Phase L component exports', () => {
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it('exports ErrorBoundaryPage (L.4)', () => {
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expect(ErrorBoundaryPage).toBeTypeOf('function');
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});
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it('exports EmptyState (L.5)', () => {
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expect(EmptyState).toBeTypeOf('function');
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});
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it('exports skeleton components (L.5)', () => {
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expect(TableSkeleton).toBeTypeOf('function');
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expect(CardGridSkeleton).toBeTypeOf('function');
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expect(FormSkeleton).toBeTypeOf('function');
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expect(DetailSkeleton).toBeTypeOf('function');
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});
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});
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describe('EmptyState component', () => {
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it('renders title and description', () => {
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render(<EmptyState title="No items" description="Create your first item to get started." />);
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expect(screen.getByText('No items')).toBeDefined();
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expect(screen.getByText('Create your first item to get started.')).toBeDefined();
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});
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it('renders action button when provided', () => {
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render(<EmptyState title="No items" actionLabel="Create" onAction={() => {}} />);
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expect(screen.getByText('Create')).toBeDefined();
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});
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});
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describe('Loading skeleton components', () => {
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it('renders TableSkeleton', () => {
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render(<TableSkeleton rows={3} columns={2} />);
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expect(screen.getByTestId('table-skeleton')).toBeDefined();
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});
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it('renders CardGridSkeleton', () => {
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render(<CardGridSkeleton count={3} />);
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expect(screen.getByTestId('card-grid-skeleton')).toBeDefined();
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});
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it('renders FormSkeleton', () => {
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render(<FormSkeleton fields={3} />);
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expect(screen.getByTestId('form-skeleton')).toBeDefined();
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});
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it('renders DetailSkeleton', () => {
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render(<DetailSkeleton />);
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expect(screen.getByTestId('detail-skeleton')).toBeDefined();
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});
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});

‎apps/web/src/components/sync/SelectiveSyncPanel.tsx‎

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/**
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* SelectiveSyncPanel — choose which objects to cache offline.
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*
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* Allows users to configure which object types should be synchronized
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* and cached locally for offline access.
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*
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* Phase K — Task K.6
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*/
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import { useState, useCallback } from 'react';
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import { Database, Download, Trash2, HardDrive } from 'lucide-react';
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import { Button } from '@/components/ui/button';
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import { Badge } from '@/components/ui/badge';
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import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
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import type { ObjectDefinition } from '@/types/metadata';
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export interface SyncConfig {
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objectName: string;
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enabled: boolean;
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/** Maximum records to sync locally */
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maxRecords: number;
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/** Last sync timestamp */
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lastSyncAt?: string;
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/** Number of records currently cached */
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cachedCount: number;
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}
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interface SelectiveSyncPanelProps {
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objects: ObjectDefinition[];
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configs: SyncConfig[];
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onToggleSync: (objectName: string, enabled: boolean) => void;
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onSyncNow?: (objectName: string) => void;
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onClearCache?: (objectName: string) => void;
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/** Total local storage usage in bytes */
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storageUsed?: number;
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/** Storage quota in bytes */
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storageQuota?: number;
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}
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function formatBytes(bytes: number): string {
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if (bytes === 0) return '0 B';
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const k = 1024;
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const sizes = ['B', 'KB', 'MB', 'GB'];
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const i = Math.floor(Math.log(bytes) / Math.log(k));
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return `${parseFloat((bytes / Math.pow(k, i)).toFixed(1))} ${sizes[i]}`;
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}
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export function SelectiveSyncPanel({
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objects,
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configs,
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onToggleSync,
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onSyncNow,
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onClearCache,
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storageUsed = 0,
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storageQuota = 0,
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}: SelectiveSyncPanelProps) {
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const [expandedObject, setExpandedObject] = useState<string | null>(null);
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const getConfig = useCallback(
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(objectName: string): SyncConfig | undefined => {
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return configs.find((c) => c.objectName === objectName);
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},
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[configs],
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);
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const enabledCount = configs.filter((c) => c.enabled).length;
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const totalCached = configs.reduce((sum, c) => sum + c.cachedCount, 0);
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const storagePercent = storageQuota > 0 ? Math.round((storageUsed / storageQuota) * 100) : 0;
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return (
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<Card data-testid="selective-sync-panel">
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<CardHeader>
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<div className="flex items-center justify-between">
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<div className="flex items-center gap-2">
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<Database className="size-5 text-muted-foreground" />
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<CardTitle>Offline Sync</CardTitle>
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</div>
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<div className="flex items-center gap-2">
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<Badge variant="secondary">
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{enabledCount} object{enabledCount !== 1 ? 's' : ''} synced
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</Badge>
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<Badge variant="outline">
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{totalCached} records cached
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</Badge>
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</div>
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</div>
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{storageQuota > 0 && (
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<div className="mt-3">
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<div className="flex items-center justify-between text-xs text-muted-foreground">
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<span className="flex items-center gap-1">
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<HardDrive className="size-3" />
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Local storage: {formatBytes(storageUsed)} / {formatBytes(storageQuota)}
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</span>
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<span>{storagePercent}% used</span>
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</div>
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<div className="mt-1 h-1.5 w-full rounded-full bg-muted">
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<div
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className={`h-full rounded-full transition-all ${
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storagePercent > 90 ? 'bg-red-500' : storagePercent > 70 ? 'bg-yellow-500' : 'bg-green-500'
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}`}
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style={{ width: `${Math.min(storagePercent, 100)}%` }}
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/>
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</div>
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</div>
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)}
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</CardHeader>
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<CardContent>
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<div className="space-y-2">
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{objects.map((obj) => {
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const config = getConfig(obj.name);
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const isEnabled = config?.enabled ?? false;
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const isExpanded = expandedObject === obj.name;
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return (
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<div key={obj.name} className="rounded-lg border">
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<div
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className="flex cursor-pointer items-center gap-3 px-4 py-3"
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onClick={() => setExpandedObject(isExpanded ? null : obj.name)}
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role="button"
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tabIndex={0}
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onKeyDown={(e) => {
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if (e.key === 'Enter' || e.key === ' ') {
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setExpandedObject(isExpanded ? null : obj.name);
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}
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}}
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>
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<input
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type="checkbox"
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checked={isEnabled}
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onChange={(e) => {
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e.stopPropagation();
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onToggleSync(obj.name, !isEnabled);
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}}
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className="size-4 rounded"
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aria-label={`Sync ${obj.label ?? obj.name} offline`}
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/>
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<div className="flex-1">
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<span className="font-medium">{obj.label ?? obj.name}</span>
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{obj.description && (
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<p className="text-xs text-muted-foreground">{obj.description}</p>
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)}
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</div>
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<div className="flex items-center gap-2">
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{config?.cachedCount ? (
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<Badge variant="secondary" className="text-xs">
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{config.cachedCount} cached
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</Badge>
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) : null}
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{config?.lastSyncAt && (
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<span className="text-xs text-muted-foreground">
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Synced {new Date(config.lastSyncAt).toLocaleDateString()}
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</span>
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)}
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</div>
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</div>
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{isExpanded && isEnabled && (
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<div className="border-t px-4 py-2">
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<div className="flex items-center gap-2">
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{onSyncNow && (
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<Button
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variant="outline"
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size="sm"
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className="gap-1 text-xs"
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onClick={() => onSyncNow(obj.name)}
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>
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<Download className="size-3" />
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Sync now
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</Button>
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)}
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{onClearCache && (
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<Button
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variant="ghost"
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size="sm"
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className="gap-1 text-xs text-destructive hover:text-destructive"
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onClick={() => onClearCache(obj.name)}
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>
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<Trash2 className="size-3" />
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Clear cache
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</Button>
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)}
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<span className="ml-auto text-xs text-muted-foreground">
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Max: {config?.maxRecords ?? 1000} records
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</span>
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</div>
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</div>
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)}
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</div>
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);
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})}
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</div>
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</CardContent>
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</Card>
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);
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}

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