feat(ui): add PersonTypeBadge to person list and detail pages

Show colored badge for non-PERSON types per design spec:
- INSTITUTION: blue with building icon
- GROUP: purple with people icon
- UNKNOWN: amber with question mark icon
- PERSON: no badge (unmarked default)

Badge appears on person cards in list and on detail page.

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

frontend/src/routes/persons/+page.svelte

@@ -3,6 +3,7 @@ import { goto } from '$app/navigation';
 import { untrack } from 'svelte';
 import { m } from '$lib/paraglide/messages.js';
 import { formatLifeDateRange } from '$lib/utils/personLifeDates';
+import PersonTypeBadge from '$lib/components/PersonTypeBadge.svelte';
 import PersonsStatsBar from './PersonsStatsBar.svelte';
 import PersonsEmptyState from './PersonsEmptyState.svelte';
 
@@ -107,6 +108,10 @@ function handleSearch() {
 							{person.displayName}
 						</p>
 
+						{#if person.personType && person.personType !== 'PERSON'}
+							<PersonTypeBadge personType={person.personType} />
+						{/if}
+
 						<!-- Alias -->
 						{#if person.alias}
 							<p class="font-sans text-xs text-ink-2 italic">„{person.alias}"</p>