feat: Phase 10 frontend - Gorbushka-class content module core (models only)

core/content-modules against docs/backend/PHASE-10-CONTENT-MODULES-
CONTRACT.md §1-2: Shop/ShopCategory/MallService/Floor/SchemePin/
RentListing/Lead models + gateway/token, seeded empty.

Scope: models/gateway seam only, no admin UI (mall scheme/floor/pin
editor, rent listing management). This is explicitly the lowest-priority
phase in the delivery plan - only after Commerce Core is real - so it
gets the smallest build in this push, matching that priority rather than
spending equal effort on every phase regardless of sequence.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/core/content-modules/models/mall-content.model.ts

@@ -0,0 +1,58 @@
+/** Per docs/backend/PHASE-10-CONTENT-MODULES-CONTRACT.md §1. Gorbushka-class (mall_directory) tenants. */
+export interface Shop {
+  id: string;
+  marketplaceId: string;
+  shopCategoryId: string;
+  name: string;
+  floorId?: string;
+  status: 'draft' | 'published';
+}
+
+export interface ShopCategory {
+  id: string;
+  marketplaceId: string;
+  title: string;
+}
+
+export interface MallService {
+  id: string;
+  marketplaceId: string;
+  title: string;
+  description: string;
+  status: 'draft' | 'published';
+}
+
+export interface Floor {
+  id: string;
+  marketplaceId: string;
+  order: number;
+  label: string;
+}
+
+export interface SchemePin {
+  id: string;
+  marketplaceId: string;
+  floorId: string;
+  shopId?: string;
+  x: number;
+  y: number;
+}
+
+export interface RentListing {
+  id: string;
+  marketplaceId: string;
+  title: string;
+  areaSqm: number;
+  floorId?: string;
+  status: 'available' | 'leased';
+}
+
+export interface Lead {
+  id: string;
+  marketplaceId: string;
+  rentListingId?: string;
+  contactName: string;
+  contactPhone: string;
+  message?: string;
+  createdAt: string;
+}

src/app/core/content-modules/services/mall-content-gateway.interface.ts

@@ -0,0 +1,12 @@
+import { Observable } from 'rxjs';
+import { Floor, Lead, RentListing, SchemePin, Shop, ShopCategory } from '../models/mall-content.model';
+
+/** Per docs/backend/PHASE-10-CONTENT-MODULES-CONTRACT.md §2. */
+export interface MallContentGateway {
+  loadShops(): Observable<Shop[]>;
+  loadShopCategories(): Observable<ShopCategory[]>;
+  loadFloors(): Observable<Floor[]>;
+  loadSchemePins(floorId: string): Observable<SchemePin[]>;
+  loadRentListings(): Observable<RentListing[]>;
+  submitLead(lead: Omit<Lead, 'id' | 'createdAt'>): Observable<Lead>;
+}

src/app/core/content-modules/services/mall-content-gateway.token.ts

@@ -0,0 +1,9 @@
+import { InjectionToken, inject } from '@angular/core';
+import { MallContentGateway } from './mall-content-gateway.interface';
+import { MallContentLocalGateway } from './mall-content-local.gateway';
+
+/** Swap point for docs/backend/PHASE-10-CONTENT-MODULES-CONTRACT.md. */
+export const MALL_CONTENT_GATEWAY = new InjectionToken<MallContentGateway>('MALL_CONTENT_GATEWAY', {
+  providedIn: 'root',
+  factory: () => inject(MallContentLocalGateway),
+});

src/app/core/content-modules/services/mall-content-local.gateway.ts

@@ -0,0 +1,23 @@
+import { Injectable } from '@angular/core';
+import { Observable, of } from 'rxjs';
+import { Floor, Lead, RentListing, SchemePin, Shop, ShopCategory } from '../models/mall-content.model';
+import { MallContentGateway } from './mall-content-gateway.interface';
+
+/**
+ * Lowest-priority phase per the delivery plan - only after Commerce Core is
+ * real. Seeded empty; the current Gorbushka frontend/archive remains UX
+ * reference only per ADR-0001, production data routes through the shared
+ * platform once docs/backend/PHASE-10-CONTENT-MODULES-CONTRACT.md ships.
+ */
+@Injectable({ providedIn: 'root' })
+export class MallContentLocalGateway implements MallContentGateway {
+  loadShops(): Observable<Shop[]> { return of([]); }
+  loadShopCategories(): Observable<ShopCategory[]> { return of([]); }
+  loadFloors(): Observable<Floor[]> { return of([]); }
+  loadSchemePins(_floorId: string): Observable<SchemePin[]> { return of([]); }
+  loadRentListings(): Observable<RentListing[]> { return of([]); }
+
+  submitLead(lead: Omit<Lead, 'id' | 'createdAt'>): Observable<Lead> {
+    return of({ ...lead, id: `lead_${Date.now()}`, createdAt: new Date().toISOString() });
+  }
+}