test(dashboard): cover DashboardResumeStrip branches

Empty card vs populated strip, title rendering, thumbnail image vs
fallback icon, progress bar aria-valuenow, document detail link,
collaborators stack rendering, safeColor fallback to default when hex
invalid.

9 tests covering ~25 of DashboardResumeStrip's branches.

Refs #496.

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

frontend/src/lib/shared/dashboard/DashboardResumeStrip.svelte.test.ts

@@ -0,0 +1,105 @@
+import { describe, it, expect, afterEach } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import DashboardResumeStrip from './DashboardResumeStrip.svelte';
+
+afterEach(cleanup);
+
+const makeResume = (overrides: Record<string, unknown> = {}) => ({
+	documentId: 'd1',
+	title: 'Brief 1923',
+	caption: 'Sender → Receiver',
+	excerpt: 'First paragraph',
+	totalBlocks: 12,
+	pct: 50,
+	thumbnailUrl: '/api/d1/thumb',
+	collaborators: [{ initials: 'AS', color: '#012851', name: null }],
+	...overrides
+});
+
+describe('DashboardResumeStrip', () => {
+	it('renders the empty card when resumeDoc is null', async () => {
+		render(DashboardResumeStrip, { props: { resumeDoc: null } });
+
+		const empty = document.querySelector('[data-testid="resume-strip-empty"]');
+		expect(empty).not.toBeNull();
+		await expect
+			.element(page.getByRole('heading', { name: /noch kein dokument begonnen/i }))
+			.toBeVisible();
+	});
+
+	it('renders the resume strip when resumeDoc is provided', async () => {
+		render(DashboardResumeStrip, { props: { resumeDoc: makeResume() } });
+
+		expect(document.querySelector('[data-testid="resume-strip"]')).not.toBeNull();
+	});
+
+	it('renders the document title', async () => {
+		render(DashboardResumeStrip, { props: { resumeDoc: makeResume() } });
+
+		await expect.element(page.getByRole('heading', { name: /brief 1923/i })).toBeVisible();
+	});
+
+	it('renders the thumbnail image when thumbnailUrl is set', async () => {
+		render(DashboardResumeStrip, { props: { resumeDoc: makeResume() } });
+
+		expect(document.querySelector('[data-testid="resume-thumbnail-img"]')).not.toBeNull();
+	});
+
+	it('renders the placeholder icon when thumbnailUrl is missing', async () => {
+		render(DashboardResumeStrip, {
+			props: { resumeDoc: makeResume({ thumbnailUrl: null }) }
+		});
+
+		expect(document.querySelector('[data-testid="resume-thumbnail-fallback"]')).not.toBeNull();
+	});
+
+	it('renders the progress bar with correct aria-valuenow', async () => {
+		render(DashboardResumeStrip, { props: { resumeDoc: makeResume({ pct: 75 }) } });
+
+		const progress = document.querySelector('[role="progressbar"]') as HTMLElement;
+		expect(progress.getAttribute('aria-valuenow')).toBe('75');
+	});
+
+	it('renders the resume CTA link to the document detail', async () => {
+		render(DashboardResumeStrip, {
+			props: { resumeDoc: makeResume({ documentId: 'doc-42' }) }
+		});
+
+		const link = document.querySelector('a[href="/documents/doc-42"]') as HTMLAnchorElement;
+		expect(link).not.toBeNull();
+	});
+
+	it('renders the collaborators stack', async () => {
+		render(DashboardResumeStrip, {
+			props: {
+				resumeDoc: makeResume({
+					collaborators: [
+						{ initials: 'XR', color: '#012851', name: null },
+						{ initials: 'YQ', color: '#5A3080', name: null }
+					]
+				})
+			}
+		});
+
+		await expect.element(page.getByText('XR')).toBeVisible();
+		await expect.element(page.getByText('YQ')).toBeVisible();
+	});
+
+	it('falls back to the default color when collaborator color is invalid', async () => {
+		render(DashboardResumeStrip, {
+			props: {
+				resumeDoc: makeResume({
+					collaborators: [{ initials: 'ZQ', color: 'not-a-hex', name: null }]
+				})
+			}
+		});
+
+		// safeColor falls back to #8c9aa3 — browser may serialize as rgb(140, 154, 163)
+		const span = Array.from(document.querySelectorAll('span')).find(
+			(s) => s.textContent?.trim() === 'ZQ'
+		) as HTMLElement;
+		const style = span.getAttribute('style') ?? '';
+		expect(style.toLowerCase()).toMatch(/(8c9aa3|140,\s*154,\s*163)/);
+	});
+});