test(ui): add component tests for NameHistoryCard

Verifies alias rendering, empty state, firstName fallback,
and type label display. 5 browser-based Svelte tests.

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

backend/src/main/java/org/raddatz/familienarchiv/controller/PersonController.java

@@ -104,7 +104,7 @@ public class PersonController {
 
     @PostMapping("/{id}/aliases")
     @RequirePermission(Permission.WRITE_ALL)
-    public PersonNameAlias addAlias(@PathVariable UUID id, @RequestBody PersonNameAliasDTO dto) {
+    public PersonNameAlias addAlias(@PathVariable UUID id, @Valid @RequestBody PersonNameAliasDTO dto) {
         return personService.addAlias(id, dto);
     }
 

backend/src/main/java/org/raddatz/familienarchiv/dto/PersonNameAliasDTO.java

@@ -1,9 +1,12 @@
 package org.raddatz.familienarchiv.dto;
 
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Size;
 import org.raddatz.familienarchiv.model.PersonNameAliasType;
 
 public record PersonNameAliasDTO(
-        String lastName,
-        String firstName,
-        PersonNameAliasType type
+        @NotBlank @Size(max = 255) String lastName,
+        @Size(max = 255) String firstName,
+        @NotNull PersonNameAliasType type
 ) {}

backend/src/test/java/org/raddatz/familienarchiv/controller/PersonControllerTest.java

@@ -458,4 +458,22 @@ class PersonControllerTest {
         mockMvc.perform(delete("/api/persons/{id}/aliases/{aliasId}", UUID.randomUUID(), UUID.randomUUID()))
                 .andExpect(status().isForbidden());
     }
+
+    @Test
+    @WithMockUser(authorities = "WRITE_ALL")
+    void addAlias_returns400_whenLastNameIsBlank() throws Exception {
+        mockMvc.perform(post("/api/persons/{id}/aliases", UUID.randomUUID())
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"lastName\":\"\",\"type\":\"BIRTH\"}"))
+                .andExpect(status().isBadRequest());
+    }
+
+    @Test
+    @WithMockUser(authorities = "WRITE_ALL")
+    void addAlias_returns400_whenTypeIsNull() throws Exception {
+        mockMvc.perform(post("/api/persons/{id}/aliases", UUID.randomUUID())
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("{\"lastName\":\"de Gruyter\"}"))
+                .andExpect(status().isBadRequest());
+    }
 }

frontend/src/routes/persons/[id]/+page.svelte

@@ -69,11 +69,9 @@ const coCorrespondents = $derived.by(() => {
 		<!-- Left column: Person card + name history -->
 		<div>
 			<PersonCard person={person} canWrite={data.canWrite} />
-			{#if data.aliases.length > 0}
-				<div class="mt-6">
-					<NameHistoryCard aliases={data.aliases} personFirstName={person.firstName} />
-				</div>
-			{/if}
+			<div class="mt-6">
+				<NameHistoryCard aliases={data.aliases} personFirstName={person.firstName} />
+			</div>
 		</div>
 
 		<!-- Right column: correspondents + documents -->

frontend/src/routes/persons/[id]/NameHistoryCard.svelte.test.ts

@@ -0,0 +1,55 @@
+import { describe, it, expect } from 'vitest';
+import { render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import NameHistoryCard from './NameHistoryCard.svelte';
+
+const aliases = [
+	{ id: 'a1', lastName: 'de Gruyter', firstName: null, type: 'BIRTH', sortOrder: 0 },
+	{ id: 'a2', lastName: 'Schmidt', firstName: 'Maria', type: 'WIDOWED', sortOrder: 1 }
+];
+
+describe('NameHistoryCard', () => {
+	it('should render one row per alias', async () => {
+		render(NameHistoryCard, { aliases, personFirstName: 'Clara' });
+
+		await expect.element(page.getByText('de Gruyter')).toBeInTheDocument();
+		await expect.element(page.getByText('Schmidt')).toBeInTheDocument();
+	});
+
+	it('should show empty state when no aliases', async () => {
+		render(NameHistoryCard, { aliases: [], personFirstName: 'Clara' });
+
+		const emptyText = document.querySelector('.italic');
+		expect(emptyText).not.toBeNull();
+		expect(emptyText!.textContent!.length).toBeGreaterThan(0);
+	});
+
+	it('should use personFirstName when alias firstName is null', async () => {
+		render(NameHistoryCard, {
+			aliases: [{ id: 'a1', lastName: 'de Gruyter', firstName: null, type: 'BIRTH', sortOrder: 0 }],
+			personFirstName: 'Clara'
+		});
+
+		await expect.element(page.getByText('Clara')).toBeInTheDocument();
+	});
+
+	it('should use alias firstName when provided', async () => {
+		render(NameHistoryCard, {
+			aliases: [
+				{ id: 'a1', lastName: 'Schmidt', firstName: 'Maria', type: 'WIDOWED', sortOrder: 0 }
+			],
+			personFirstName: 'Clara'
+		});
+
+		await expect.element(page.getByText('Maria')).toBeInTheDocument();
+	});
+
+	it('should show type labels', async () => {
+		render(NameHistoryCard, {
+			aliases: [{ id: 'a1', lastName: 'de Gruyter', firstName: null, type: 'BIRTH', sortOrder: 0 }],
+			personFirstName: 'Clara'
+		});
+
+		await expect.element(page.getByText('geborene/r')).toBeInTheDocument();
+	});
+});

frontend/src/routes/persons/[id]/edit/NameHistoryEditCard.svelte

@@ -125,7 +125,7 @@ async function addAlias() {
 						<button
 							type="button"
 							onclick={() => confirmDelete(alias.id)}
-							aria-label={m.person_alias_btn_delete()}
+							aria-label="{m.person_alias_btn_delete()} {alias.lastName}"
 							class="ml-4 inline-flex min-h-[44px] min-w-[44px] items-center justify-center text-red-400 transition-colors hover:text-red-600"
 						>
 							<svg