Refactor application structure to use WorkspaceService for state management

- Removed direct state management from components and centralized it in WorkspaceService.
- Updated ApartmentsPage, TenantsPage, LeasesPage, and DashboardPage to utilize WorkspaceService for data handling.
- Introduced SessionService to manage user session state and authentication.
- Simplified component templates to reflect new service-based architecture.
- Removed unused ConfigService and its tests.
- Added lease.html template for lease document generation.
- Created app.routes.spec.ts for route mapping tests.

frontend/src/app/components/tenants-page/tenants-page.ts

@@ -1,10 +1,9 @@
-import { Component, input, output, signal } from '@angular/core';
+import { Component, inject, signal } from '@angular/core';
 import { MatButtonModule } from '@angular/material/button';
 import { Tenant } from '../../services/tenant.service';
-import { TenantCard, TenantAttachmentRequest } from '../tenant-card/tenant-card';
-import { TenantForm, TenantSaveRequest } from '../tenant-form/tenant-form';
-
-export type { TenantAttachmentRequest, TenantSaveRequest };
+import { WorkspaceService } from '../../services/workspace.service';
+import { TenantCard } from '../tenant-card/tenant-card';
+import { TenantForm } from '../tenant-form/tenant-form';
 
 @Component({
   selector: 'app-tenants-page',
@@ -13,16 +12,13 @@ export type { TenantAttachmentRequest, TenantSaveRequest };
   styleUrl: './tenants-page.css',
 })
 export class TenantsPage {
-  readonly tenants = input.required<Tenant[]>();
-  readonly attachmentError = input('');
-  readonly tenantSaved = output<TenantSaveRequest>();
-  readonly deleteRequested = output<string>();
-  readonly attachmentUploadRequested = output<{ tenantId: string; file: File }>();
-  readonly attachmentDownloadRequested = output<TenantAttachmentRequest>();
+  readonly workspace = inject(WorkspaceService);
 
   readonly showForm = signal(false);
   readonly editingTenant = signal<Tenant | null>(null);
 
+  constructor() { this.workspace.loadTenants(); }
+
   openAddForm(): void {
     this.editingTenant.set(null);
     this.showForm.set(true);