very first commit

src/app/models/auth.model.ts

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+/**
+ * Project identifier for authentication
+ */
+export type ProjectType = 'dexar' | 'novo' | 'fastcheck' | 'backoffice' | string;
+
+/**
+ * Device type classification
+ */
+export type DeviceType = 'mobile' | 'desktop' | 'tablet' | null;
+
+/**
+ * Operating system type
+ */
+export type DeviceOS = 'android' | 'ios' | 'windows' | 'macos' | 'linux' | null;
+
+/**
+ * Authentication context
+ */
+export type AuthContext = 'browser' | 'application' | 'telegram' | null;
+
+/**
+ * Complete device information
+ */
+export interface DeviceInfo {
+  deviceType: DeviceType;
+  deviceOS: DeviceOS;
+  context: AuthContext;
+  project: ProjectType;
+  userAgent?: string;
+  screenResolution?: string;
+  browserName?: string;
+  browserVersion?: string;
+}
+
+/**
+ * QR code generation request
+ */
+export interface QRGenerationRequest {
+  project: ProjectType;
+  deviceInfo: DeviceInfo;
+}
+
+/**
+ * QR code generation response
+ */
+export interface QRGenerationResponse {
+  sessionId: string;
+  qrCode: string; // base64 image or URL
+  expiresAt: string;
+  expiresIn: number; // seconds
+}
+
+/**
+ * QR code scan request
+ */
+export interface QRScanRequest {
+  sessionId: string;
+  deviceInfo: DeviceInfo;
+}
+
+/**
+ * Authentication status check
+ */
+export interface AuthStatusResponse {
+  authenticated: boolean;
+  token?: string;
+  userId?: string;
+  expiresAt?: string;
+  userInfo?: {
+    username: string;
+    email?: string;
+    role?: string;
+  };
+}
+
+/**
+ * Login request (traditional)
+ */
+export interface LoginRequest {
+  username: string;
+  password: string;
+  deviceInfo: DeviceInfo;
+}
+
+/**
+ * Login response
+ */
+export interface LoginResponse {
+  success: boolean;
+  token?: string;
+  userId?: string;
+  expiresAt?: string;
+  message?: string;
+  userInfo?: {
+    username: string;
+    email?: string;
+    role?: string;
+  };
+}
+
+/**
+ * Session validation request
+ */
+export interface SessionValidationRequest {
+  token: string;
+  deviceInfo: DeviceInfo;
+}
+
+/**
+ * Session validation response
+ */
+export interface SessionValidationResponse {
+  valid: boolean;
+  userId?: string;
+  expiresAt?: string;
+  userInfo?: {
+    username: string;
+    email?: string;
+    role?: string;
+  };
+}
+
+/**
+ * Logout request
+ */
+export interface LogoutRequest {
+  token: string;
+  deviceInfo: DeviceInfo;
+}
+
+/**
+ * Error response
+ */
+export interface ErrorResponse {
+  error: boolean;
+  message: string;
+  code?: string;
+  details?: any;
+}