test(persons): cover personType icon paths + life-date branches

INSTITUTION/GROUP/UNKNOWN personType icons, birthYear-only and
deathYear-only life-date display.

5 new tests covering ~10 branches.

Refs #496.

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

frontend/src/routes/persons/page.svelte.test.ts

@@ -187,4 +187,110 @@ describe('persons/+ page', () => {
 
 		await expect.element(page.getByText(/Anni/)).toBeVisible();
 	});
+
+	it('shows the institution svg icon for INSTITUTION personType', async () => {
+		render(PersonsListPage, {
+			props: {
+				data: baseData({
+					persons: [
+						{
+							id: 'p1',
+							firstName: '',
+							lastName: 'Bundesarchiv',
+							displayName: 'Bundesarchiv',
+							personType: 'INSTITUTION'
+						}
+					]
+				})
+			}
+		});
+
+		// SVG icon (not initials text)
+		const card = document.querySelector('a[href="/persons/p1"]');
+		expect(card?.querySelector('svg')).not.toBeNull();
+	});
+
+	it('shows the group svg icon for GROUP personType', async () => {
+		render(PersonsListPage, {
+			props: {
+				data: baseData({
+					persons: [
+						{
+							id: 'pg',
+							firstName: '',
+							lastName: 'Family X',
+							displayName: 'Family X',
+							personType: 'GROUP'
+						}
+					]
+				})
+			}
+		});
+
+		const card = document.querySelector('a[href="/persons/pg"]');
+		expect(card?.querySelector('svg')).not.toBeNull();
+	});
+
+	it('shows the unknown svg icon for UNKNOWN personType', async () => {
+		render(PersonsListPage, {
+			props: {
+				data: baseData({
+					persons: [
+						{
+							id: 'pu',
+							firstName: '',
+							lastName: 'Unknown',
+							displayName: 'Unknown',
+							personType: 'UNKNOWN'
+						}
+					]
+				})
+			}
+		});
+
+		const card = document.querySelector('a[href="/persons/pu"]');
+		expect(card?.querySelector('svg')).not.toBeNull();
+	});
+
+	it('renders only birthYear with em-dash when no death year', async () => {
+		render(PersonsListPage, {
+			props: {
+				data: baseData({
+					persons: [
+						{
+							id: 'p1',
+							firstName: 'Anna',
+							lastName: 'Schmidt',
+							displayName: 'Anna Schmidt',
+							personType: 'PERSON',
+							birthYear: 1899
+						}
+					]
+				})
+			}
+		});
+
+		expect(document.body.textContent).toContain('1899');
+	});
+
+	it('renders only deathYear with em-dash when no birth year', async () => {
+		render(PersonsListPage, {
+			props: {
+				data: baseData({
+					persons: [
+						{
+							id: 'p1',
+							firstName: 'Anna',
+							lastName: 'Schmidt',
+							displayName: 'Anna Schmidt',
+							personType: 'PERSON',
+							deathYear: 1950
+						}
+					]
+				})
+			}
+		});
+
+		expect(document.body.textContent).toContain('1950');
+	});
 });