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CORE_INFRASTRUCTURE_SUMMARY.md
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CORE_INFRASTRUCTURE_SUMMARY.md
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# Core Infrastructure Setup - Summary
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**Date:** November 12, 2025
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**Status:** ✅ Completed (6 of 7 tasks)
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**Angular Version:** v20 with Standalone Components and Signals
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---
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## Completed Tasks
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### ✅ 1. Environment Configuration
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**Created:**
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- `src/environments/environment.ts` - Production configuration
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- `src/environments/environment.development.ts` - Development configuration
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**Configuration:**
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```typescript
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{
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apiUrl: 'http://localhost:3000/api',
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apiTimeout: 30000,
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cacheTimeout: 300000,
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enableLogging: true
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}
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```
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**Updated:**
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- `angular.json` - Added fileReplacements for environment switching
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---
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### ✅ 2. TypeScript Interfaces & Models
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**Created 7 comprehensive model files:**
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1. **user.model.ts** - User, AuthResponse, AuthState, UserRegistration, UserLogin
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2. **category.model.ts** - Category, CategoryDetail, CategoryStats, QuestionPreview
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3. **question.model.ts** - Question, QuestionFormData, QuestionSearchFilters
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4. **quiz.model.ts** - QuizSession, QuizResults, QuizAnswerSubmission, QuizQuestionResult
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5. **guest.model.ts** - GuestSession, GuestSettings, GuestAnalytics, GuestState
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6. **dashboard.model.ts** - UserDashboard, CategoryPerformance, AdminStatistics
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7. **index.ts** - Barrel export for all models
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**Total Interfaces:** 40+ TypeScript interfaces covering all API models
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---
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### ✅ 3. HTTP Interceptors
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**Created 3 functional interceptors:**
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1. **auth.interceptor.ts**
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- Adds JWT Bearer token to authenticated requests
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- Skips auth for guest endpoints
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- Uses functional interceptor pattern (Angular v20)
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2. **guest.interceptor.ts**
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- Adds `x-guest-token` header for guest user requests
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- Only applies when no auth token exists
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- Handles guest session token management
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3. **error.interceptor.ts**
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- Global HTTP error handling
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- Maps HTTP status codes to user-friendly messages
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- Handles 401 with auto-redirect to login
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- Integrates with ToastService for error notifications
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- Rate limiting (429) handling
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**Registered in:** `app.config.ts` using `withInterceptors()`
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---
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### ✅ 4. Core Services
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**Created 4 essential services:**
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1. **storage.service.ts**
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- Token management (JWT, Guest)
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- User data persistence
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- Theme preference storage
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- Remember me functionality
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- localStorage/sessionStorage abstraction
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2. **toast.service.ts**
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- Signal-based notification system
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- 4 notification types: success, error, warning, info
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- Auto-dismiss with configurable duration
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- Action buttons support
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- Queue management
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3. **state.service.ts**
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- Signal-based state management utility
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- localStorage/sessionStorage persistence
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- Helper functions for creating persisted signals
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- Loading and error state management
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4. **loading.service.ts**
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- Global loading state with signals
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- Loading counter for concurrent requests
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- Customizable loading messages
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- Force stop functionality
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---
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### ✅ 5. Angular Material Setup
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**Installed:** `@angular/material@20.2.12`
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**Configuration:**
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- Theme: Azure Blue
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- Typography: Enabled
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- Animations: Enabled
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**Updated Files:**
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- `package.json` - Material dependencies added
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- `src/styles.scss` - Material theme imported
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- `src/index.html` - Material fonts and icons
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---
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### ✅ 6. Shared UI Components
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**Created 2 reusable components:**
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1. **LoadingSpinnerComponent**
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- Material spinner integration
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- Configurable size and message
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- Overlay mode for full-screen loading
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- Signal-based inputs
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```html
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<app-loading-spinner
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message="Loading data..."
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size="50"
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overlay="true">
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</app-loading-spinner>
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```
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2. **ToastContainerComponent**
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- Toast notification display
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- 4 notification styles with icons
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- Action button support
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- Auto-dismiss with animations
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- Material icons integration
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- Responsive design (mobile-friendly)
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**Integrated:**
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- Toast container added to main `app.html`
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- Ready for app-wide notifications
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---
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## Project Structure
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```
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frontend/
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├── src/
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│ ├── app/
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│ │ ├── core/
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│ │ │ ├── models/
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│ │ │ │ ├── user.model.ts
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│ │ │ │ ├── category.model.ts
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│ │ │ │ ├── question.model.ts
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│ │ │ │ ├── quiz.model.ts
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│ │ │ │ ├── guest.model.ts
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│ │ │ │ ├── dashboard.model.ts
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│ │ │ │ └── index.ts
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│ │ │ ├── interceptors/
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│ │ │ │ ├── auth.interceptor.ts
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│ │ │ │ ├── guest.interceptor.ts
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│ │ │ │ ├── error.interceptor.ts
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│ │ │ │ └── index.ts
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│ │ │ └── services/
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│ │ │ ├── storage.service.ts
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│ │ │ ├── toast.service.ts
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│ │ │ ├── state.service.ts
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│ │ │ ├── loading.service.ts
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│ │ │ └── index.ts
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│ │ ├── shared/
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│ │ │ └── components/
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│ │ │ ├── loading-spinner/
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│ │ │ │ ├── loading-spinner.ts
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│ │ │ │ ├── loading-spinner.html
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│ │ │ │ └── loading-spinner.scss
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│ │ │ └── toast-container/
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│ │ │ ├── toast-container.ts
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│ │ │ ├── toast-container.html
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│ │ │ └── toast-container.scss
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│ │ ├── app.config.ts (interceptors configured)
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│ │ ├── app.ts (toast container imported)
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│ │ └── app.html (toast container added)
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│ └── environments/
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│ ├── environment.ts
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│ └── environment.development.ts
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├── angular.json (updated)
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└── package.json (Material added)
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```
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---
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## Technologies & Patterns
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**Angular v20 Features:**
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- ✅ Standalone components
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- ✅ Signals for state management
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- ✅ Functional interceptors
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- ✅ Signal-based inputs
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- ✅ Control flow syntax (@for, @if)
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- ✅ Zoneless change detection
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**Material Design:**
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- ✅ Azure Blue theme
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- ✅ Progress spinner
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- ✅ Icons
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- ✅ Buttons
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**State Management:**
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- ✅ Signal-based reactive state
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- ✅ Persistent storage (localStorage/sessionStorage)
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- ✅ Loading and error states
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- ✅ Toast notifications
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---
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## Next Steps (Remaining Task)
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### 🔲 7. Configure Routing Structure
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- [ ] Create route guards (auth, admin, guest)
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- [ ] Set up lazy loading for feature modules
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- [ ] Configure route paths
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- [ ] Implement 404 handling
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- [ ] Add route preloading strategy
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---
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## Usage Examples
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### Using Storage Service
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```typescript
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import { StorageService } from './core/services';
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constructor(private storage: StorageService) {}
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// Save token
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this.storage.setToken('jwt-token', true);
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// Get token
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const token = this.storage.getToken();
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// Check authentication
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if (this.storage.isAuthenticated()) {
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// User is logged in
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}
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```
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### Using Toast Service
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```typescript
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import { ToastService } from './core/services';
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constructor(private toast: ToastService) {}
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// Show notifications
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this.toast.success('Login successful!');
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this.toast.error('Something went wrong');
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this.toast.warning('Session expiring soon');
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this.toast.info('New feature available');
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// With action button
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this.toast.showWithAction(
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'Item deleted',
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'Undo',
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() => this.undoDelete(),
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'warning'
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);
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```
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### Using Loading Service
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```typescript
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import { LoadingService } from './core/services';
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constructor(private loading: LoadingService) {}
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// Start loading
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this.loading.start('Fetching data...');
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// Stop loading
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this.loading.stop();
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// Check loading state
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if (this.loading.getLoadingState()) {
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// Currently loading
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}
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```
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---
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## File Statistics
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**Files Created:** 21
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**Lines of Code:** ~2,000+
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**Interfaces Defined:** 40+
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**Services Created:** 4
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**Interceptors Created:** 3
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**Components Created:** 2
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---
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## Quality Checklist
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- ✅ TypeScript strict mode enabled
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- ✅ All interfaces properly typed
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- ✅ Error handling implemented
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- ✅ Loading states managed
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- ✅ Responsive design ready
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- ✅ Material Design integrated
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- ✅ Signal-based reactivity
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- ✅ Service injection patterns
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- ✅ Separation of concerns
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- ✅ Reusable components
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---
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**Status:** Ready for feature module development!
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**Next:** Authentication Module, Guest Module, Category Module
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