refactor: move document domain core to lib/document/

Moves ~25 components, utils (search, filename, groupDocuments,
documentStatusLabel, validateFile), bulkSelection store, and
TranscriptionSection sub-component. Fixes broken relative imports.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/lib/document/EnrichmentBlock.svelte.spec.ts

@@ -0,0 +1,89 @@
+import { describe, it, expect, afterEach, vi } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+
+// The store must live in a separate module because vi.mock factories are
+// hoisted and cannot reference top-level variables defined in this file.
+import { navigatingStore } from './__mocks__/navigatingStore';
+import EnrichmentBlock from './EnrichmentBlock.svelte';
+
+vi.mock('$app/stores', async () => {
+	const mod = await import('./__mocks__/navigatingStore');
+	return { navigating: mod.navigatingStore };
+});
+
+afterEach(() => {
+	cleanup();
+	navigatingStore.set(null);
+});
+
+type Doc = { id: string; title: string; uploadedAt: string };
+
+function doc(id: string, title = 'Doc'): Doc {
+	return { id, title, uploadedAt: '2026-04-20T12:00:00' };
+}
+
+describe('EnrichmentBlock', () => {
+	it('renders nothing when topDocs is empty and banner count is 0', async () => {
+		render(EnrichmentBlock, {
+			topDocs: [],
+			totalCount: 0,
+			bannerCount: 0,
+			onBannerClose: vi.fn()
+		});
+		await expect.element(page.getByTestId('enrichment-block')).not.toBeInTheDocument();
+	});
+
+	it('renders the list component when topDocs is non-empty', async () => {
+		render(EnrichmentBlock, {
+			topDocs: [doc('d1')],
+			totalCount: 1,
+			bannerCount: 0,
+			onBannerClose: vi.fn()
+		});
+		await expect.element(page.getByTestId('dashboard-needs-metadata')).toBeInTheDocument();
+	});
+
+	it('renders the banner when bannerCount > 0', async () => {
+		render(EnrichmentBlock, {
+			topDocs: [],
+			totalCount: 0,
+			bannerCount: 3,
+			onBannerClose: vi.fn()
+		});
+		await expect.element(page.getByRole('status')).toBeInTheDocument();
+	});
+
+	it('composes banner + list when both are present', async () => {
+		render(EnrichmentBlock, {
+			topDocs: [doc('d1')],
+			totalCount: 1,
+			bannerCount: 2,
+			onBannerClose: vi.fn()
+		});
+		await expect.element(page.getByRole('status')).toBeInTheDocument();
+		await expect.element(page.getByTestId('dashboard-needs-metadata')).toBeInTheDocument();
+	});
+
+	it('renders the skeleton when $navigating is active and topDocs is empty', async () => {
+		navigatingStore.set({ type: 'link' });
+		render(EnrichmentBlock, {
+			topDocs: [],
+			totalCount: 0,
+			bannerCount: 0,
+			onBannerClose: vi.fn()
+		});
+		await expect.element(page.getByTestId('enrichment-block-skeleton')).toBeInTheDocument();
+	});
+
+	it('does not render the skeleton when topDocs is non-empty even during $navigating', async () => {
+		navigatingStore.set({ type: 'link' });
+		render(EnrichmentBlock, {
+			topDocs: [doc('d1')],
+			totalCount: 1,
+			bannerCount: 0,
+			onBannerClose: vi.fn()
+		});
+		await expect.element(page.getByTestId('enrichment-block-skeleton')).not.toBeInTheDocument();
+	});
+});