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

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

frontend/messages/de.json

@@ -331,6 +331,12 @@
 	"persons_stats_persons_many": "{count} Personen",
 	"persons_stats_documents_one": "1 Dokument",
 	"persons_stats_documents_many": "{count} Dokumente",
+	"persons_stats_label_persons_one": "Person",
+	"persons_stats_label_persons_many": "Personen",
+	"persons_stats_label_documents_one": "Dokument",
+	"persons_stats_label_documents_many": "Dokumente",
+	"person_card_doc_count_one": "1 Dok.",
+	"person_card_doc_count_many": "{count} Dok.",
 	"error_person_not_found": "Die Person wurde nicht gefunden.",
 	"person_btn_edit": "Bearbeiten",
 	"person_discard_changes": "Änderungen verwerfen",

frontend/messages/en.json

@@ -331,6 +331,12 @@
 	"persons_stats_persons_many": "{count} persons",
 	"persons_stats_documents_one": "1 document",
 	"persons_stats_documents_many": "{count} documents",
+	"persons_stats_label_persons_one": "Person",
+	"persons_stats_label_persons_many": "Persons",
+	"persons_stats_label_documents_one": "Document",
+	"persons_stats_label_documents_many": "Documents",
+	"person_card_doc_count_one": "1 doc",
+	"person_card_doc_count_many": "{count} docs",
 	"error_person_not_found": "Person not found.",
 	"person_btn_edit": "Edit",
 	"person_discard_changes": "Discard changes",

frontend/messages/es.json

@@ -331,6 +331,12 @@
 	"persons_stats_persons_many": "{count} personas",
 	"persons_stats_documents_one": "1 documento",
 	"persons_stats_documents_many": "{count} documentos",
+	"persons_stats_label_persons_one": "Persona",
+	"persons_stats_label_persons_many": "Personas",
+	"persons_stats_label_documents_one": "Documento",
+	"persons_stats_label_documents_many": "Documentos",
+	"person_card_doc_count_one": "1 doc.",
+	"person_card_doc_count_many": "{count} docs.",
 	"error_person_not_found": "Persona no encontrada.",
 	"person_btn_edit": "Editar",
 	"person_discard_changes": "Descartar cambios",