feat(platform): add audit logs and activity feed

frontend/athena/types/audit.ts

@@ -0,0 +1,38 @@
+export type ApiSuccess<T> = {
+  success: boolean;
+  data: T;
+  message: string;
+};
+
+export type AuditLog = {
+  id: number;
+  actor_user_id: number | null;
+  actor_username: string;
+  action: string;
+  entity_type: string;
+  entity_id: number | null;
+  entity_label: string;
+  ip_address: string;
+  user_agent: string;
+  before_data: unknown;
+  after_data: unknown;
+  metadata_data: Record<string, unknown>;
+  created_at: string;
+};
+
+export type AuditLogListResponse = {
+  items: AuditLog[];
+  total: number;
+  page: number;
+  page_size: number;
+};
+
+export type ActivityFeedItem = {
+  id: number;
+  title: string;
+  description: string;
+  actor: string;
+  entity_type: string;
+  entity_id: number | null;
+  created_at: string;
+};