Add related cases and duplicate review suggestions

src/lib/ui/moderation.ts

@@ -1,5 +1,7 @@
 import {
     moderationCaseStatusLabels,
+    moderationCaseRelationLabels,
+    type ModerationCaseRelation,
     type ModerationCaseStatus,
     type ModerationGame
 } from '$lib/moderation.js';
@@ -69,6 +71,10 @@ export const moderationActionLabels: Record<string, string> = {
     'case.reopened': 'Case reopened',
     'case.updated': 'Case updated',
     'case.assessed': 'Assessment revised',
+    'case.linked': 'Case relationship added',
+    'case.unlinked': 'Case relationship removed',
+    'link-case': 'Case relationship added',
+    'unlink-case': 'Case relationship removed',
     'assess-case': 'Assessment revised',
     'case.evidence_attached': 'Evidence attached',
     'case.restriction': 'Restriction linked to case',
@@ -98,6 +104,21 @@ export function moderationEventDetail(detail: string, action: string): string {
                           ? moderationCaseStatusLabels[item as ModerationCaseStatus]
                           : item
                       : '';
+            if (
+                (action === 'case.linked' || action === 'case.unlinked') &&
+                typeof value.relation === 'string' &&
+                Object.hasOwn(moderationCaseRelationLabels, value.relation) &&
+                typeof value.relatedCaseId === 'string' &&
+                typeof value.reason === 'string'
+            ) {
+                const label =
+                    value.direction === 'incoming' && value.relation !== 'same_incident'
+                        ? value.relation === 'appeal_of'
+                            ? 'Appealed by'
+                            : 'Has duplicate'
+                        : moderationCaseRelationLabels[value.relation as ModerationCaseRelation];
+                return `${label}: ${value.relatedCaseId}\n${value.reason}`;
+            }
             if (action === 'case.assessed' && typeof value.summary === 'string')
                 return `Assessment revision ${value.assessmentRevision}: ${value.summary}`;
             if (action === 'case.updated') {