Integrate complete Candidat platform with ASP.NET chatbot service

- Added Next.js frontend for candidate interviews
- Added Node.js backend with TypeScript and AI integration
- Added ASP.NET Core chatbot service for specialized AI conversations
- Added MySQL database with complete schema
- Added Nginx reverse proxy configuration
- Complete Docker Compose orchestration for all services
- Environment configuration for production, development, and Cloudflare
- Comprehensive documentation and setup instructions
- Flattened nested folder structures for clean organization
- Integrated chatbot service with fallback to direct AI calls

backend/src/models/User.ts

@@ -0,0 +1,66 @@
+export interface User {
+  id: string;
+  email: string;
+  password_hash: string;
+  first_name: string;
+  last_name: string;
+  role: 'admin' | 'recruiter';
+  company_name?: string;
+  avatar_url?: string;
+  is_active: boolean;
+  last_login_at?: Date;
+  email_verified_at?: Date;
+  created_at: Date;
+  updated_at: Date;
+  deleted_at?: Date;
+}
+
+export type LoginRequest = {
+  email: string;
+  password: string;
+}
+
+export type RegisterRequest = {
+  email: string;
+  password: string;
+  first_name: string;
+  last_name: string;
+  company_name?: string;
+}
+
+export type CreateUserRequest = {
+  email: string;
+  password: string;
+  first_name: string;
+  last_name: string;
+  company_name?: string;
+  role?: 'admin' | 'recruiter';
+}
+
+export type UpdateUserRequest = {
+  first_name?: string;
+  last_name?: string;
+  company_name?: string;
+  avatar_url?: string;
+  is_active?: boolean;
+}
+
+export type UserResponse = {
+  id: string;
+  email: string;
+  first_name: string;
+  last_name: string;
+  role: 'admin' | 'recruiter';
+  company_name?: string;
+  avatar_url?: string;
+  is_active: boolean;
+  last_login_at?: Date;
+  email_verified_at?: Date;
+  created_at: Date;
+  updated_at: Date;
+}
+
+export type LoginResponse = {
+  token: string;
+  user: UserResponse;
+}