feat(clerk): add dedicated nav pages, state restore, and fullscreen ESC fix

- Add ClerkUiStateService with full account state save/restore (no double network call on back navigation)
- Add Photo & Signature, Standing Instructions, Today's Activity as dedicated nav pages
- Remove photo/signature, standing instructions, linked accounts, today's activity panels from main dashboard
- Add ESC key to exit fullscreen; clicking Clerk nav immediately restores fullscreen without re-navigating
- Compact clerk dashboard UI with reduced font sizes and padding throughout
- Add CashierOnlyGuard for route protection

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/cashier/cashier-routing.module.ts

@@ -10,6 +10,7 @@ import { NgModule } from '@angular/core';
 import { Routes, RouterModule } from '@angular/router';
 
 import { Route } from '../core/route/route.service';
+import { CashierOnlyGuard } from '../core/authentication/cashier-only.guard';
 import { CashExchangeEntryComponent } from './cash-exchange-entry/cash-exchange-entry.component';
 import { CurrencyExchangeDetailComponent } from './currency-exchange-detail/currency-exchange-detail.component';
 import { CashTransferComponent } from './cash-transfer/cash-transfer.component';
@@ -24,6 +25,46 @@ import { ShareCollectionComponent } from './share-collection/share-collection.co
 
 const routes: Routes = [
   Route.withShell([
+    {
+      path: 'clerk',
+      data: { title: 'Clerk', breadcrumb: 'Clerk' },
+      children: [
+        {
+          path: 'dashboard',
+          loadComponent: () =>
+            import('../clerk/clerk-dashboard/clerk-dashboard.component').then((m) => m.ClerkDashboardComponent),
+          data: { title: 'Clerk Dashboard', breadcrumb: 'Clerk Dashboard' }
+        },
+        {
+          path: 'account-facilities',
+          loadComponent: () =>
+            import('../clerk/account-facilities/account-facilities.component').then(
+              (m) => m.AccountFacilitiesComponent
+            ),
+          data: { title: 'Account Facilities', breadcrumb: 'Account Facilities' }
+        },
+        {
+          path: 'photo-signature',
+          loadComponent: () =>
+            import('../clerk/photo-signature/photo-signature.component').then((m) => m.PhotoSignatureComponent),
+          data: { title: 'Photo & Signature', breadcrumb: 'Photo & Signature' }
+        },
+        {
+          path: 'standing-instructions',
+          loadComponent: () =>
+            import('../clerk/standing-instructions/standing-instructions.component').then(
+              (m) => m.StandingInstructionsComponent
+            ),
+          data: { title: 'Standing Instructions', breadcrumb: 'Standing Instructions' }
+        },
+        {
+          path: 'today-activity',
+          loadComponent: () =>
+            import('../clerk/today-activity/today-activity.component').then((m) => m.TodayActivityComponent),
+          data: { title: "Today's Activity", breadcrumb: "Today's Activity" }
+        }
+      ]
+    },
     {
       path: 'cashier',
       data: { title: 'Cashier', breadcrumb: 'Cashier' },
@@ -85,6 +126,7 @@ const routes: Routes = [
         },
         {
           path: 'transaction-entry',
+          canActivate: [CashierOnlyGuard],
           loadComponent: () =>
             import('./transaction-entry/transaction-entry.component').then((m) => m.TransactionEntryComponent),
           data: {