fix(persons): replace hardcoded 'docs'/'Persons'/'Documents' strings with i18n keys

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

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

@@ -125,7 +125,9 @@ function handleSearch() {
 							<span
 								class="mt-1 inline-flex items-center rounded-full border border-line bg-muted px-2.5 py-0.5 font-sans text-[11px] font-semibold text-ink-2"
 							>
-								{person.documentCount} docs
+								{person.documentCount === 1
+									? m.person_card_doc_count_one()
+									: m.person_card_doc_count_many({ count: person.documentCount ?? 0 })}
 							</span>
 						{/if}
 					</div>

frontend/src/routes/persons/PersonsStatsBar.svelte

@@ -1,4 +1,6 @@
 <script lang="ts">
+import { m } from '$lib/paraglide/messages.js';
+
 let {
 	totalPersons,
 	totalDocuments
@@ -6,20 +8,29 @@ let {
 	totalPersons: number;
 	totalDocuments: number;
 } = $props();
+
+const personsLabel = $derived(
+	totalPersons === 1 ? m.persons_stats_label_persons_one() : m.persons_stats_label_persons_many()
+);
+const documentsLabel = $derived(
+	totalDocuments === 1
+		? m.persons_stats_label_documents_one()
+		: m.persons_stats_label_documents_many()
+);
 </script>
 
 <div class="flex items-baseline gap-4">
 	<div class="flex items-baseline gap-1.5">
 		<span class="font-sans text-2xl font-black text-ink">{totalPersons}</span>
 		<span class="font-sans text-[10px] font-bold tracking-widest text-ink-3 uppercase">
-			Persons
+			{personsLabel}
 		</span>
 	</div>
 	<span class="font-sans text-lg text-line">·</span>
 	<div class="flex items-baseline gap-1.5">
 		<span class="font-sans text-2xl font-black text-ink">{totalDocuments}</span>
 		<span class="font-sans text-[10px] font-bold tracking-widest text-ink-3 uppercase">
-			Documents
+			{documentsLabel}
 		</span>
 	</div>
 </div>