refactor: move person domain components and utils to lib/person/

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

frontend/src/lib/person/relationshipLabels.ts

@@ -0,0 +1,77 @@
+import * as m from '$lib/paraglide/messages.js';
+import type { components } from '$lib/generated/api';
+
+type RelationshipDTO = components['schemas']['RelationshipDTO'];
+
+export function chipLabel(rel: RelationshipDTO, perspectivePersonId: string): string {
+	const viewpointIsSubject = rel.personId === perspectivePersonId;
+	switch (rel.relationType) {
+		case 'PARENT_OF':
+			return viewpointIsSubject ? m.relation_parent_of() : m.relation_child_of();
+		case 'SPOUSE_OF':
+			return m.relation_spouse_of();
+		case 'SIBLING_OF':
+			return m.relation_sibling_of();
+		case 'FRIEND':
+			return m.relation_friend();
+		case 'COLLEAGUE':
+			return m.relation_colleague();
+		case 'EMPLOYER':
+			return m.relation_employer();
+		case 'DOCTOR':
+			return m.relation_doctor();
+		case 'NEIGHBOR':
+			return m.relation_neighbor();
+		default:
+			return m.relation_other();
+	}
+}
+
+export function otherName(rel: RelationshipDTO, perspectivePersonId: string): string {
+	return rel.personId === perspectivePersonId
+		? rel.relatedPersonDisplayName
+		: rel.personDisplayName;
+}
+
+/**
+ * Maps a backend inferred-label key (parent, uncle_aunt, ...) to its
+ * localised string. Unknown keys fall back to "distant".
+ */
+export function inferredRelationshipLabel(key: string): string {
+	switch (key) {
+		case 'parent':
+			return m.relation_inferred_parent();
+		case 'child':
+			return m.relation_inferred_child();
+		case 'spouse':
+			return m.relation_inferred_spouse();
+		case 'sibling':
+			return m.relation_inferred_sibling();
+		case 'grandparent':
+			return m.relation_inferred_grandparent();
+		case 'grandchild':
+			return m.relation_inferred_grandchild();
+		case 'great_grandparent':
+			return m.relation_inferred_great_grandparent();
+		case 'great_grandchild':
+			return m.relation_inferred_great_grandchild();
+		case 'uncle_aunt':
+			return m.relation_inferred_uncle_aunt();
+		case 'niece_nephew':
+			return m.relation_inferred_niece_nephew();
+		case 'great_uncle_aunt':
+			return m.relation_inferred_great_uncle_aunt();
+		case 'great_niece_nephew':
+			return m.relation_inferred_great_niece_nephew();
+		case 'inlaw_parent':
+			return m.relation_inferred_inlaw_parent();
+		case 'inlaw_child':
+			return m.relation_inferred_inlaw_child();
+		case 'sibling_inlaw':
+			return m.relation_inferred_sibling_inlaw();
+		case 'cousin_1':
+			return m.relation_inferred_cousin_1();
+		default:
+			return m.relation_inferred_distant();
+	}
+}