chore(cleanup): Phase 1 - remove dead code, fix orphaned SeoService wiring

Ran knip to find unused exports/dependencies (deps already clean, no
unused packages/files found).

Removed genuinely dead code (verified zero references anywhere,
including templates):
- 4 unused constants in config/constants.ts (scroll/pagination/search
  thresholds never consumed)
- isAdminRole(), toSearchResult(), createInitialSearchState(),
  getTranslatedCategoryName() - unused utility functions
- DEFAULT_EDITOR_HEADER_CONFIG - unused constant
- TelegramService - entire file deleted; cart.component.ts/
  cart.service.ts already implement the same window.Telegram.WebApp
  access directly, this was an unused duplicate

Real bug fix found during the sweep: SeoService has providedIn:'root'
with a live effect() meant to sync <title>/OG/canonical tags to
tenant bootstrap config, but nothing in the app ever injected it, so
Angular never instantiated it and the effect never ran - the SEO sync
a prior sprint reported as "done and verified" was actually dead on
arrival. Fixed by injecting SeoService in the root App component.

Left alone: ~125 knip-flagged "unused exported types" - overwhelmingly
config/schema interfaces for the widget/theme/admin domain models,
high false-positive rate for this kind of interface-heavy Angular app,
deleting blind risks breaking structural type contracts. Also left
locally-used-but-over-exported helpers (toCssColor/toBackendColor,
HTML_EDITOR_TOOLBAR*, HISTORY_LIMIT, DEFAULT_CATALOG_PAGE_SIZE) - real
code, not dead, just exported wider than needed.

tsc --noEmit and ng build --configuration=production both clean (only
pre-existing bundle-budget warning, unrelated).

Files changed: src/app/app.ts, src/app/config/constants.ts,
src/app/core/auth/models/permission.model.ts,
src/app/core/products/models/catalog-experience.model.ts,
src/app/core/search/models/search-state.model.ts,
src/app/features/project-editor/models/project-editor.model.ts,
src/app/services/index.ts, src/app/utils/item.utils.ts,
src/app/services/telegram.service.ts (deleted)

src/app/app.ts

@@ -14,6 +14,7 @@ import { TranslateService } from './i18n/translate.service';
 import { PlatformRuntimeService } from './core/runtime/platform-runtime.service';
 import { UiRuntimeFacade } from './facades/runtime/ui-runtime.facade';
 import { ApiHealthService } from './services/api-health.service';
+import { SeoService } from './services/seo.service';
 import { FloatingNotificationsComponent } from './features/website/user-experience/components/floating-notifications/floating-notifications.component';
 import { AdminAuthService } from './core/admin-auth/admin-auth.service';
 import { AuthService } from './services/auth.service';
@@ -42,6 +43,7 @@ export class App implements OnInit {
   private platformRuntime = inject(PlatformRuntimeService);
   private uiRuntime = inject(UiRuntimeFacade);
   private apiHealth = inject(ApiHealthService);
+  private seoService = inject(SeoService);
   private authService = inject(AuthService);
   private adminAuthService = inject(AdminAuthService);
 

src/app/config/constants.ts

@@ -4,14 +4,6 @@ export const PAYMENT_MIN_POLL_SECONDS = 60;
 export const PAYMENT_TIMEOUT_CLOSE_MS = 3000;
 export const LINK_COPIED_DURATION_MS = 2000;
 
-// Infinite scroll
-export const SCROLL_THRESHOLD_PX = 1200;
-export const SCROLL_DEBOUNCE_MS = 100;
-export const ITEMS_PER_PAGE = 50;
-
-// Search
-export const SEARCH_DEBOUNCE_MS = 300;
-
 // Cache
 export const CACHE_DURATION_MS = 5 * 60 * 1000;
 export const CATEGORY_CACHE_DURATION_MS = 2 * 60 * 1000;

src/app/core/auth/models/permission.model.ts

@@ -28,7 +28,3 @@ export const ROLE_PERMISSIONS: Readonly<Record<AdminRole, readonly Permission[]>
   Support: ['backoffice.read'],
   ReadOnly: ['backoffice.read', 'builder.read']
 };
-
-export function isAdminRole(value: unknown): value is AdminRole {
-  return typeof value === 'string' && value in ROLE_PERMISSIONS;
-}

src/app/core/products/models/catalog-experience.model.ts

@@ -67,20 +67,3 @@ export interface SearchResult {
   pageSize: number;
   summary: string;
 }
-
-export function toSearchResult(result: ProductListResult, criteria: SearchCriteria): SearchResult {
-  const pageSize = Math.max(1, criteria.pageSize ?? result.count ?? 24);
-  const page = Math.max(1, criteria.page ?? Math.floor((result.skip ?? 0) / pageSize) + 1);
-  const keyword = (criteria.keyword ?? '').trim();
-
-  return {
-    criteria,
-    items: result.items,
-    total: result.total,
-    page,
-    pageSize,
-    summary: keyword.length > 0
-      ? `Results for "${keyword}" (${result.total})`
-      : `Products found: ${result.total}`
-  };
-}

src/app/core/search/models/search-state.model.ts

@@ -10,18 +10,3 @@ export interface SearchState {
 	pageSize: number;
 	filters: SearchFilterState;
 }
-
-export function createInitialSearchState(pageSize = 24): SearchState {
-	return {
-		text: '',
-		sort: 'relevance',
-		layout: 'grid',
-		page: 1,
-		pageSize,
-		filters: {
-			values: {},
-			ranges: {},
-			toggles: {},
-		},
-	};
-}

src/app/features/project-editor/models/project-editor.model.ts

@@ -53,17 +53,3 @@ export interface ProjectEditorWidgetPreset {
   type: string;
   label: string;
 }
-
-export const DEFAULT_EDITOR_HEADER_CONFIG: Required<HeaderConfig> = {
-  showLogo: true,
-  showSearch: true,
-  showCategories: true,
-  showLanguages: true,
-  showCart: true,
-  showProfile: false,
-  showWishlist: true,
-  showCompare: true,
-  showRegion: true,
-  sticky: true,
-  layout: 'default',
-};

src/app/services/index.ts

@@ -1,6 +1,5 @@
 export * from './api.service';
 export * from './cart.service';
-export * from './telegram.service';
 export * from './language.service';
 export * from './seo.service';
 export * from './location.service';

src/app/services/telegram.service.ts

@@ -1,39 +0,0 @@
-import { Injectable } from '@angular/core';
-import type { } from '../types/telegram.types';
-
-@Injectable({
-  providedIn: 'root'
-})
-export class TelegramService {
-  private tg = typeof window !== 'undefined' ? window.Telegram?.WebApp : null;
-
-  isTelegramApp(): boolean {
-    return !!this.tg;
-  }
-
-  getUser() {
-    return this.tg?.initDataUnsafe?.user || null;
-  }
-
-  getUserId(): number | null {
-    return this.tg?.initDataUnsafe?.user?.id || null;
-  }
-
-  getUsername(): string | null {
-    return this.tg?.initDataUnsafe?.user?.username || null;
-  }
-
-  getFirstName(): string | null {
-    return this.tg?.initDataUnsafe?.user?.first_name || null;
-  }
-
-  getFullName(): string | null {
-    const user = this.getUser();
-    if (!user) return null;
-    return `${user.first_name}${user.last_name ? ' ' + user.last_name : ''}`;
-  }
-
-  getDisplayName(): string {
-    return this.getUsername() || this.getFullName() || 'User';
-  }
-}

src/app/utils/item.utils.ts

@@ -106,19 +106,3 @@ export function getTranslatedField(
   if (field === 'simpleDescription') return item.simpleDescription || item.description || '';
   return '';
 }
-
-/**
- * Get translated category name for the current language.
- */
-export function getTranslatedCategoryName(cat: Category, lang: string): string {
-  const translation = cat.translations?.[lang];
-  if (translation?.name) return translation.name;
-
-  if (cat.names?.length) {
-    const entry = cat.names.find(n => n.language === lang || n.language === lang.toUpperCase() || (lang === 'hy' && n.language === 'AM'));
-    const val = entry?.value || (entry as any)?.valuue || '';
-    if (val) return val;
-  }
-
-  return cat.name || '';
-}