feat(expense-snapshot): route + sidebar nav for snapshot management

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

APP/src/app/app.routes.ts

@@ -14,6 +14,7 @@ import { GivingsPageComponent } from './features/giving/pages/givings-page/givin
 import { OfferingSessionPageComponent } from './features/giving/pages/offering-session-page/offering-session-page.component';
 import { ExpenseCategoriesPageComponent } from './features/expense/pages/expense-categories-page/expense-categories-page.component';
 import { ExpensesPageComponent } from './features/expense/pages/expenses-page/expenses-page.component';
+import { ExpenseSnapshotsPageComponent } from './features/expense/pages/expense-snapshots-page/expense-snapshots-page.component';
 import { MyReimbursementsPageComponent } from './features/expense/pages/my-reimbursements-page/my-reimbursements-page.component';
 import { MonthlyStatementPageComponent } from './features/expense/pages/monthly-statement-page/monthly-statement-page.component';
 import { FinanceDashboardPageComponent } from './features/finance-dashboard/pages/finance-dashboard-page/finance-dashboard-page.component';
@@ -162,6 +163,15 @@ export const routes: Routes = [
                     title: 'Expenses', titleZh: '支出', section: 'Finance',
                 },
             },
+            {
+                path: 'finance/expense-snapshots',
+                component: ExpenseSnapshotsPageComponent,
+                canActivate: [PermissionGuard],
+                data: {
+                    permission: { module: PermissionModules.Expenses, action: 'read' },
+                    title: 'Expense Snapshots', titleZh: '費用範本', section: 'Finance',
+                },
+            },
             {
                 path: 'finance/expense-categories',
                 component: ExpenseCategoriesPageComponent,

APP/src/app/portals/user-portal/user-portal.component.ts

@@ -132,6 +132,8 @@ export class UserPortalComponent implements OnInit, OnDestroy {
           permission: { module: PermissionModules.Expenses, action: 'read' } },
         { text: 'Expense Categories', icon: categorizeIcon,      path: '/user-portal/finance/expense-categories',
           permission: { module: PermissionModules.ExpenseCategories, action: 'read' } },
+        { text: 'Expense Snapshots', icon: categorizeIcon,      path: '/user-portal/finance/expense-snapshots',
+          permission: { module: PermissionModules.Expenses, action: 'read' } },
         { text: 'Disbursements',      icon: banknoteOutlineIcon, path: '/user-portal/finance/disbursements',
           permission: { module: PermissionModules.Disbursements, action: 'read' } },
         { text: 'Check Register',     icon: walletOutlineIcon,   path: '/user-portal/finance/check-register',