feat: add actor to order timeline audit trail

AdminOrderTimelineEntry had no actor field at all - order status
changes and refund requests were unattributed. Added actor: string,
populated from the signed-in admin's displayName (same pattern as
Users/Transactions), surfaced in the order detail timeline UI.

Real backend-issued orders still need a server-side audit trail;
this only covers the local mock gateway pending backend work
(BACKEND-API-REFERENCE.md §12).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/features/admin/orders/components/order-timeline/order-timeline.component.html

@@ -13,6 +13,9 @@
           }
         </div>
         <p class="order-timeline__note">{{ entry.note }}</p>
+        @if (entry.actor) {
+          <span class="order-timeline__actor">{{ entry.actor }}</span>
+        }
       </div>
     </li>
   }

src/app/features/admin/orders/components/order-timeline/order-timeline.component.scss

@@ -55,3 +55,10 @@
   font-size: var(--font-size-sm, 0.8125rem);
   color: var(--text-secondary);
 }
+
+.order-timeline__actor {
+  display: block;
+  margin-top: 2px;
+  font-size: var(--font-size-xs, 0.75rem);
+  color: var(--text-light);
+}

src/app/features/admin/orders/components/order-timeline/order-timeline.component.ts

@@ -8,6 +8,7 @@ export interface OrderTimelineEntry {
   /** Pre-resolved, already-translated display text for this event. */
   note: string;
   orderNumber?: string;
+  actor?: string;
 }
 
 /** Reusable vertical event timeline - used on both the order detail page and the customer activity tab. */

src/app/features/admin/orders/models/admin-order.model.ts

@@ -33,6 +33,7 @@ export interface AdminOrderTimelineEntry {
   status: AdminOrderStatus;
   timestamp: string;
   eventKey: AdminOrderTimelineEventKey;
+  actor: string;
 }
 
 export interface AdminOrder {

src/app/features/admin/orders/pages/admin-order-detail-page.component.ts

@@ -54,6 +54,7 @@ export class AdminOrderDetailPageComponent {
       note: this.translate.t('adminOrders.timelineEvent.' + entry.eventKey, {
         status: this.translate.t('adminOrders.status.' + entry.status),
       }),
+      actor: entry.actor,
     }));
   });
 

src/app/features/admin/orders/services/admin-orders-local.gateway.ts

@@ -1,8 +1,9 @@
-import { Injectable } from '@angular/core';
+import { Injectable, inject } from '@angular/core';
 import { Observable, of } from 'rxjs';
 import { delay } from 'rxjs/operators';
 import { AdminOrder, AdminOrderListFilters, AdminOrdersListResult, AdminOrderStatus } from '../models/admin-order.model';
 import { AdminOrdersGateway } from './admin-orders-gateway.interface';
+import { AdminAuthService } from '../../../../core/admin-auth/admin-auth.service';
 
 const STATUSES: AdminOrderStatus[] = ['pending', 'processing', 'shipped', 'delivered', 'cancelled', 'refunded'];
 const CUSTOMER_NAMES = ['Anna Petrova', 'Karen Sargsyan', 'Ivan Ivanov', 'Mariam Grigoryan', 'Sergey Volkov', 'Lilit Hakobyan'];
@@ -10,8 +11,13 @@ const SEED_COUNT = 24;
 
 @Injectable({ providedIn: 'root' })
 export class AdminOrdersLocalGateway implements AdminOrdersGateway {
+  private readonly adminAuth = inject(AdminAuthService);
   private cache: AdminOrder[] | null = null;
 
+  private get currentActor(): string {
+    return this.adminAuth.displayName() ?? 'admin';
+  }
+
   loadOrders(filters: AdminOrderListFilters): Observable<AdminOrdersListResult> {
     const all = this.ensureData();
     const filtered = all
@@ -36,7 +42,7 @@ export class AdminOrdersLocalGateway implements AdminOrdersGateway {
       ...order,
       status,
       updatedAt: new Date().toISOString(),
-      timeline: [...order.timeline, { status, timestamp: new Date().toISOString(), eventKey: 'statusChanged' as const }],
+      timeline: [...order.timeline, { status, timestamp: new Date().toISOString(), eventKey: 'statusChanged' as const, actor: this.currentActor }],
     }));
   }
 
@@ -45,7 +51,7 @@ export class AdminOrdersLocalGateway implements AdminOrdersGateway {
       ...order,
       payment: { ...order.payment, status: 'refund_requested' },
       updatedAt: new Date().toISOString(),
-      timeline: [...order.timeline, { status: order.status, timestamp: new Date().toISOString(), eventKey: 'refundRequested' as const }],
+      timeline: [...order.timeline, { status: order.status, timestamp: new Date().toISOString(), eventKey: 'refundRequested' as const, actor: this.currentActor }],
     }));
   }
 
@@ -122,8 +128,8 @@ export class AdminOrdersLocalGateway implements AdminOrdersGateway {
       notes: '',
       internalNotes: '',
       timeline: [
-        { status: 'pending', timestamp: createdAt, eventKey: 'created' },
-        ...(status !== 'pending' ? [{ status, timestamp: createdAt, eventKey: 'statusChanged' as const }] : []),
+        { status: 'pending', timestamp: createdAt, eventKey: 'created', actor: 'system' },
+        ...(status !== 'pending' ? [{ status, timestamp: createdAt, eventKey: 'statusChanged' as const, actor: 'system' }] : []),
       ],
       archived: false,
       createdAt,