refactor: rename duplicate AdminRole interface, type sellerId as UUID

AdminRole was defined twice with unrelated shapes (core/auth's real
JWT role union vs. the Users admin page's display interface), flagged
in BACKEND-API-REFERENCE.md \u00a72b as needing a rename. Renamed the
Users-page one to AdminUserRoleRecord.

sellerId was bare string in admin-order/admin-product/item models
while core/sellers/models/seller-scope.model.ts already used the
shared UUID alias. Aligned all three to UUID for consistency (UUID is
currently just = string, so this is a documentation-level type change,
not a behavior change).

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

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

@@ -1,3 +1,5 @@
+import { UUID } from '../../../../shared/types/primitive.types';
+
 export type AdminOrderStatus = 'pending' | 'processing' | 'shipped' | 'delivered' | 'cancelled' | 'refunded';
 export type AdminOrderPaymentStatus = 'unpaid' | 'paid' | 'refund_requested' | 'refunded';
 
@@ -57,7 +59,7 @@ export interface AdminOrder {
    * Absent means marketplace-owned, exactly like every order today -
    * nothing reads this field yet, no behavior change.
    */
-  sellerId?: string;
+  sellerId?: UUID;
 }
 
 export interface AdminOrderListFilters {

src/app/features/admin/products/models/admin-product.model.ts

@@ -1,3 +1,5 @@
+import { UUID } from '../../../../shared/types/primitive.types';
+
 export type AdminProductStockStatus = 'in_stock' | 'low_stock' | 'out_of_stock';
 export type AdminProductSort = 'title' | 'price' | 'priority' | 'stock' | 'updated';
 export type AdminProductEditorMode = 'create' | 'edit' | 'duplicate';
@@ -117,7 +119,7 @@ export interface AdminProduct {
    * Absent means marketplace-owned, exactly like every product today -
    * nothing reads this field yet, nothing breaks by it being undefined.
    */
-  sellerId?: string;
+  sellerId?: UUID;
 }
 
 export interface AdminProductListFilters {

src/app/features/admin/users/facade/admin-users.facade.ts

@@ -1,6 +1,6 @@
 import { Injectable, inject, signal } from '@angular/core';
 import { take } from 'rxjs/operators';
-import { AdminInvitation, AdminRole, AdminSession, AdminUser, AdminUserAuditEntry, AdminUserScope, AdminUserStatus } from '../models/admin-user.model';
+import { AdminInvitation, AdminUserRoleRecord, AdminSession, AdminUser, AdminUserAuditEntry, AdminUserScope, AdminUserStatus } from '../models/admin-user.model';
 import { AdminUsersLocalGateway } from '../services/admin-users-local.gateway';
 
 @Injectable({ providedIn: 'root' })
@@ -8,7 +8,7 @@ export class AdminUsersFacade {
   private readonly gateway = inject(AdminUsersLocalGateway);
 
   readonly users = signal<AdminUser[]>([]);
-  readonly roles = signal<AdminRole[]>([]);
+  readonly roles = signal<AdminUserRoleRecord[]>([]);
   readonly invitations = signal<AdminInvitation[]>([]);
   readonly loading = signal(false);
   readonly error = signal(false);

src/app/features/admin/users/models/admin-user.model.ts

@@ -2,7 +2,8 @@ export type AdminUserScope = 'marketplace' | 'office';
 export type AdminUserStatus = 'active' | 'invited' | 'suspended';
 export type AdminInvitationStatus = 'pending' | 'accepted' | 'expired' | 'revoked';
 
-export interface AdminRole {
+/** Users-admin display/permissions shape - unrelated to core/auth/models/permission.model.ts's AdminRole (the real JWT/auth role union). */
+export interface AdminUserRoleRecord {
   id: string;
   name: string;
   permissions: string[];

src/app/features/admin/users/services/admin-users-gateway.interface.ts

@@ -1,9 +1,9 @@
 import { Observable } from 'rxjs';
-import { AdminInvitation, AdminRole, AdminSession, AdminUser, AdminUserAuditEntry, AdminUserScope, AdminUserStatus } from '../models/admin-user.model';
+import { AdminInvitation, AdminUserRoleRecord, AdminSession, AdminUser, AdminUserAuditEntry, AdminUserScope, AdminUserStatus } from '../models/admin-user.model';
 
 export interface AdminUsersGateway {
   loadUsers(): Observable<AdminUser[]>;
-  loadRoles(): Observable<AdminRole[]>;
+  loadRoles(): Observable<AdminUserRoleRecord[]>;
   loadInvitations(): Observable<AdminInvitation[]>;
   loadSessions(userId: string): Observable<AdminSession[]>;
   loadAudit(userId: string): Observable<AdminUserAuditEntry[]>;

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

@@ -1,11 +1,11 @@
 import { Injectable, inject } from '@angular/core';
 import { Observable, of } from 'rxjs';
 import { delay } from 'rxjs/operators';
-import { AdminInvitation, AdminRole, AdminSession, AdminUser, AdminUserAuditEntry, AdminUserScope, AdminUserStatus } from '../models/admin-user.model';
+import { AdminInvitation, AdminUserRoleRecord, AdminSession, AdminUser, AdminUserAuditEntry, AdminUserScope, AdminUserStatus } from '../models/admin-user.model';
 import { AdminUsersGateway } from './admin-users-gateway.interface';
 import { AdminAuthService } from '../../../../core/admin-auth/admin-auth.service';
 
-const BUILT_IN_ROLES: AdminRole[] = [
+const BUILT_IN_ROLES: AdminUserRoleRecord[] = [
   { id: 'owner', name: 'Owner', permissions: ['*'], builtIn: true },
   { id: 'admin', name: 'Admin', permissions: ['products.manage', 'categories.manage', 'orders.manage', 'media.manage', 'users.manage'], builtIn: true },
   { id: 'editor', name: 'Editor', permissions: ['products.manage', 'categories.manage', 'media.manage'], builtIn: true },
@@ -16,7 +16,7 @@ const BUILT_IN_ROLES: AdminRole[] = [
 export class AdminUsersLocalGateway implements AdminUsersGateway {
   private readonly adminAuth = inject(AdminAuthService);
   private users: AdminUser[] | null = null;
-  private roles: AdminRole[] = [...BUILT_IN_ROLES];
+  private roles: AdminUserRoleRecord[] = [...BUILT_IN_ROLES];
   private invitations: AdminInvitation[] = [];
   private sessions: Record<string, AdminSession[]> = {};
   private audit: Record<string, AdminUserAuditEntry[]> = {};
@@ -25,7 +25,7 @@ export class AdminUsersLocalGateway implements AdminUsersGateway {
     return of(this.ensureUsers()).pipe(delay(50));
   }
 
-  loadRoles(): Observable<AdminRole[]> {
+  loadRoles(): Observable<AdminUserRoleRecord[]> {
     return of(this.roles).pipe(delay(50));
   }