Merged PR 2065: ♻️ refactor(core-navigation): remove library and use TabService directly

♻️ refactor(core-navigation): remove library and use TabService directly

Remove @isa/core/navigation library entirely as it was just a thin
wrapper around TabService.patchTabMetadata(). Consumers now use
TabService directly for scoped metadata operations.

Changes:
- Delete libs/core/navigation/ (~12 files, ~2900 LOC removed)
- Update 6 consumer components to use TabService directly
- Remove @isa/core/navigation path alias from tsconfig.base.json
- All operations now synchronous (removed async/await)

Migration pattern:
- preserveContext() → patchTabMetadata(tabId, { [scope]: data })
- restoreContext() → activatedTab()?.metadata?.[scope]
- restoreAndClearContext() → get + patchTabMetadata(tabId, { [scope]: null })

Refs #5502

apps/isa-app/src/page/customer/components/kundenkarte/kundenkarte.component.ts

@@ -9,8 +9,7 @@ import { DecimalPipe } from '@angular/common';
 import { Component, Input, OnInit, inject } from '@angular/core';
 import { IconComponent } from '@shared/components/icon';
 import { BonusCardInfoDTO } from '@generated/swagger/crm-api';
-import { injectTabId } from '@isa/core/tabs';
-import { NavigationStateService } from '@isa/core/navigation';
+import { injectTabId, TabService } from '@isa/core/tabs';
 import { Router } from '@angular/router';
 import { CustomerSearchNavigation } from '@shared/services/navigation';
 
@@ -47,7 +46,7 @@ import { CustomerSearchNavigation } from '@shared/services/navigation';
 export class KundenkarteComponent implements OnInit {
   #tabId = injectTabId();
   #router = inject(Router);
-  #navigationState = inject(NavigationStateService);
+  #tabService = inject(TabService);
   #customerNavigationService = inject(CustomerSearchNavigation);
 
   @Input() cardDetails: BonusCardInfoDTO;
@@ -69,13 +68,12 @@ export class KundenkarteComponent implements OnInit {
       return;
     }
 
-    this.#navigationState.preserveContext(
-      {
+    this.#tabService.patchTabMetadata(tabId, {
+      'select-customer': {
         returnUrl: `/${tabId}/reward`,
         autoTriggerContinueFn: true,
       },
-      'select-customer',
-    );
+    });
 
     await this.#router.navigate(
       this.#customerNavigationService.detailsRoute({

apps/isa-app/src/page/customer/customer-search/details-main-view/details-main-view.component.ts

@@ -49,9 +49,14 @@ import {
   NavigateAfterRewardSelection,
   RewardSelectionPopUpService,
 } from '@isa/checkout/shared/reward-selection-dialog';
-import { NavigationStateService } from '@isa/core/navigation';
+import { TabService } from '@isa/core/tabs';
 import { ShippingAddressDTO as CrmShippingAddressDTO } from '@generated/swagger/crm-api';
 
+interface SelectCustomerContext {
+  returnUrl?: string;
+  autoTriggerContinueFn?: boolean;
+}
+
 export interface CustomerDetailsViewMainState {
   isBusy: boolean;
   shoppingCart: ShoppingCartDTO;
@@ -80,7 +85,7 @@ export class CustomerDetailsViewMainComponent
   private _router = inject(Router);
   private _activatedRoute = inject(ActivatedRoute);
   private _genderSettings = inject(GenderSettingsService);
-  private _navigationState = inject(NavigationStateService);
+  private _tabService = inject(TabService);
   private _onDestroy$ = new Subject<void>();
 
   customerService = inject(CrmCustomerService);
@@ -97,18 +102,19 @@ export class CustomerDetailsViewMainComponent
     map(([fetchingCustomer, fetchingList]) => fetchingCustomer || fetchingList),
   );
 
-  async getReturnUrlFromContext(): Promise<string | null> {
-    // Get from preserved context (survives intermediate navigations, auto-scoped to tab)
-    const context = await this._navigationState.restoreContext<{
-      returnUrl?: string;
-    }>('select-customer');
+  getReturnUrlFromContext(): string | null {
+    // Get from preserved context (survives intermediate navigations, scoped to tab)
+    const context = this._tabService.activatedTab()?.metadata?.[
+      'select-customer'
+    ] as SelectCustomerContext | undefined;
 
     return context?.returnUrl ?? null;
   }
 
-  async checkHasReturnUrl(): Promise<void> {
-    const hasContext =
-      await this._navigationState.hasPreservedContext('select-customer');
+  checkHasReturnUrl(): void {
+    const hasContext = !!this._tabService.activatedTab()?.metadata?.[
+      'select-customer'
+    ];
     this.hasReturnUrl.set(hasContext);
   }
 
@@ -321,24 +327,23 @@ export class CustomerDetailsViewMainComponent
 
   ngOnInit() {
     // Check if we have a return URL context
-    this.checkHasReturnUrl().then(async () => {
-      // Check if we should auto-trigger continue() (only from Kundenkarte)
-      const context = await this._navigationState.restoreContext<{
-        returnUrl?: string;
-        autoTriggerContinueFn?: boolean;
-      }>('select-customer');
+    this.checkHasReturnUrl();
 
-      if (context?.autoTriggerContinueFn) {
-        // Clear the autoTriggerContinueFn flag immediately (preserves returnUrl automatically)
-        await this._navigationState.patchContext(
-          { autoTriggerContinueFn: undefined },
-          'select-customer',
-        );
+    // Check if we should auto-trigger continue() (only from Kundenkarte)
+    const tab = this._tabService.activatedTab();
+    const context = tab?.metadata?.['select-customer'] as
+      | SelectCustomerContext
+      | undefined;
 
-        // Auto-trigger continue() ONLY when coming from Kundenkarte
-        this.continue();
-      }
-    });
+    if (context?.autoTriggerContinueFn && tab) {
+      // Clear the autoTriggerContinueFn flag immediately (preserves returnUrl)
+      this._tabService.patchTabMetadata(tab.id, {
+        'select-customer': { ...context, autoTriggerContinueFn: undefined },
+      });
+
+      // Auto-trigger continue() ONLY when coming from Kundenkarte
+      this.continue();
+    }
 
     this.processId$
       .pipe(
@@ -436,10 +441,18 @@ export class CustomerDetailsViewMainComponent
 
     // #5262 Check for reward selection flow before navigation
     if (this.hasReturnUrl()) {
-      // Restore from preserved context (auto-scoped to current tab) and clean up
-      const context = await this._navigationState.restoreAndClearContext<{
-        returnUrl?: string;
-      }>('select-customer');
+      // Restore from preserved context (scoped to current tab) and clean up
+      const tab = this._tabService.activatedTab();
+      const context = tab?.metadata?.['select-customer'] as
+        | SelectCustomerContext
+        | undefined;
+
+      // Clear the context
+      if (tab) {
+        this._tabService.patchTabMetadata(tab.id, {
+          'select-customer': null,
+        });
+      }
 
       if (context?.returnUrl) {
         await this._router.navigateByUrl(context.returnUrl);

apps/isa-app/src/page/customer/customer-search/kundenkarte-main-view/kundenkarte-main-view.component.ts

@@ -10,7 +10,7 @@ import {
 import { CustomerSearchStore } from '../store';
 import { ActivatedRoute, Router } from '@angular/router';
 import { map } from 'rxjs/operators';
-import { NavigationStateService } from '@isa/core/navigation';
+import { TabService } from '@isa/core/tabs';
 import { CustomerSearchNavigation } from '@shared/services/navigation';
 import { AsyncPipe } from '@angular/common';
 import { CustomerMenuComponent } from '../../components/customer-menu';
@@ -51,7 +51,7 @@ export class KundenkarteMainViewComponent implements OnDestroy {
   #cardTransactionsResource = inject(CustomerCardTransactionsResource);
   elementRef = inject(ElementRef);
   #router = inject(Router);
-  #navigationState = inject(NavigationStateService);
+  #tabService = inject(TabService);
   #customerNavigationService = inject(CustomerSearchNavigation);
 
   /**
@@ -120,13 +120,12 @@ export class KundenkarteMainViewComponent implements OnDestroy {
     }
 
     // Preserve context for auto-triggering continue() in details view
-    this.#navigationState.preserveContext(
-      {
+    this.#tabService.patchTabMetadata(tabId, {
+      'select-customer': {
         returnUrl: `/${tabId}/reward`,
         autoTriggerContinueFn: true,
       },
-      'select-customer',
-    );
+    });
 
     // Navigate to customer details - will auto-trigger continue()
     await this.#router.navigate(