added apiClient class handling api auth and validation response from backend

backend/src/server.ts

@@ -51,39 +51,26 @@ if (isDevelopment) {
 }
 
 const configureStaticFiles = () => {
-  const possiblePaths = [
+  const staticConfig = {
-    // Production path (Docker)
+    maxAge: '1y',
-    '/app/frontend-build',
+    etag: false,
-    // Development paths
+    immutable: true,
-    path.resolve(__dirname, '../../frontend/dist'),
+    index: false
-    path.resolve(__dirname, '../frontend/dist'), // Added for monorepo
+  };
-    path.resolve(process.cwd(), 'frontend/dist'), // Current directory
-    path.resolve(process.cwd(), '../frontend/dist'), // Parent directory
-    // Vite dev server fallback
-    ...(isDevelopment ? [path.resolve(__dirname, '../../frontend')] : [])
-  ];
 
-  for (const testPath of possiblePaths) {
+  // Serve frontend build
-    try {
+  const frontendPath = '/app/frontend-build';
-      if (fs.existsSync(testPath)) {
+  if (fs.existsSync(frontendPath)) {
-        // In development, check for dist or direct source
+    console.log('✅ Serving frontend from:', frontendPath);
-        if (fs.existsSync(path.join(testPath, 'index.html'))) {
+    app.use(express.static(frontendPath, staticConfig));
-          console.log('✅ Found frontend at:', testPath);
+  }
-          app.use(express.static(testPath));
+
-          return testPath;
+  // Serve premium assets if available
-        }
+  const premiumPath = '/app/premium-dist';
-        // For Vite dev server in development
+  if (fs.existsSync(premiumPath)) {
-        else if (isDevelopment && fs.existsSync(path.join(testPath, 'index.html'))) {
+    console.log('✅ Serving premium assets from:', premiumPath);
-          console.log('🔧 Development: Serving frontend source from:', testPath);
+    app.use('/premium-assets', express.static(premiumPath, staticConfig));
-          app.use(express.static(testPath));
-          return testPath;
-        }
-      }
-    } catch (error) {
-      // Silent catch
-    }
   }
-  return null;
 };
 
 // Security configuration
@@ -225,7 +212,7 @@ const findFrontendBuildPath = (): string | null => {
 };
 
 const frontendBuildPath = findFrontendBuildPath();
-const staticPath = configureStaticFiles();
+configureStaticFiles();
 
 if (frontendBuildPath) {
   app.use(express.static(frontendBuildPath));
@@ -264,32 +251,26 @@ app.get('/', async (req, res) => {
 });
 
 // Client-side routing fallback
-app.get('*', async (req, res, next) => {
+app.get('*', (req, res, next) => {
+  // Skip API routes
   if (req.path.startsWith('/api/')) {
-    return next(); // API routes handled normally
+    return next();
   }
 
-  // Vite dev server handling
+  // Skip file extensions (assets)
-  if (vite) {
+  if (req.path.match(/\.[a-z0-9]+$/i)) {
-    try {
+    return next();
-      const template = fs.readFileSync(
-        path.resolve(__dirname, '../../frontend/index.html'),
-        'utf-8'
-      );
-      const html = await vite.transformIndexHtml(req.url, template);
-      return res.send(html);
-    } catch (error) {
-      console.error('Vite transformation error:', error);
-    }
   }
 
-  // Static file fallback
+  // Serve React app for all other routes
-  if (staticPath) {
+  const frontendPath = '/app/frontend-build';
-    const indexPath = path.join(staticPath, 'index.html');
+  const indexPath = path.join(frontendPath, 'index.html');
-    return res.sendFile(indexPath);
+  
+  if (fs.existsSync(indexPath)) {
+    res.sendFile(indexPath);
+  } else {
+    res.status(404).send('Frontend not available');
   }
-
-  res.status(500).send('Frontend not available');
 });
 
 // Error handling

frontend/src/services/apiClient.ts

@@ -0,0 +1,130 @@
+import { ValidationError, ErrorService } from './errorService';
+
+export class ApiError extends Error {
+  public validationErrors: ValidationError[];
+  public statusCode: number;
+  public originalError?: any;
+
+  constructor(message: string, validationErrors: ValidationError[] = [], statusCode: number = 0, originalError?: any) {
+    super(message);
+    this.name = 'ApiError';
+    this.validationErrors = validationErrors;
+    this.statusCode = statusCode;
+    this.originalError = originalError;
+  }
+}
+
+export class ApiClient {
+  private baseURL: string;
+
+  constructor() {
+    this.baseURL = import.meta.env.VITE_API_URL || '/api';
+  }
+
+  private getAuthHeaders(): HeadersInit {
+    const token = localStorage.getItem('token');
+    return token ? { 'Authorization': `Bearer ${token}` } : {};
+  }
+
+  private async handleApiResponse<T>(response: Response): Promise<T> {
+    if (!response.ok) {
+      let errorData;
+      
+      try {
+        // Try to parse error response as JSON
+        const responseText = await response.text();
+        errorData = responseText ? JSON.parse(responseText) : {};
+      } catch {
+        // If not JSON, create a generic error object
+        errorData = { error: `HTTP ${response.status}: ${response.statusText}` };
+      }
+      
+      // Extract validation errors using your existing ErrorService
+      const validationErrors = ErrorService.extractValidationErrors(errorData);
+
+      if (validationErrors.length > 0) {
+        // Throw error with validationErrors property for useBackendValidation hook
+        throw new ApiError(
+          errorData.error || 'Validation failed',
+          validationErrors,
+          response.status,
+          errorData
+        );
+      }
+
+      // Throw regular error for non-validation errors
+      throw new ApiError(
+        errorData.error || errorData.message || `HTTP error! status: ${response.status}`,
+        [],
+        response.status,
+        errorData
+      );
+    }
+
+    // For successful responses, try to parse as JSON
+    try {
+      const responseText = await response.text();
+      return responseText ? JSON.parse(responseText) : {} as T;
+    } catch (error) {
+      // If response is not JSON but request succeeded (e.g., 204 No Content)
+      return {} as T;
+    }
+  }
+
+  async request<T>(endpoint: string, options: RequestInit = {}): Promise<T> {
+    const url = `${this.baseURL}${endpoint}`;
+    
+    const config: RequestInit = {
+      headers: {
+        'Content-Type': 'application/json',
+        ...this.getAuthHeaders(),
+        ...options.headers,
+      },
+      ...options,
+    };
+
+    try {
+      const response = await fetch(url, config);
+      return await this.handleApiResponse<T>(response);
+    } catch (error) {
+      // Re-throw the error to be caught by useBackendValidation
+      if (error instanceof ApiError) {
+        throw error;
+      }
+      
+      // Wrap non-ApiError errors
+      throw new ApiError(
+        error instanceof Error ? error.message : 'Unknown error occurred',
+        [],
+        0,
+        error
+      );
+    }
+  }
+
+  // Standardized HTTP methods
+  get = <T>(endpoint: string) => this.request<T>(endpoint);
+  
+  post = <T>(endpoint: string, data?: any) => 
+    this.request<T>(endpoint, { 
+      method: 'POST', 
+      body: data ? JSON.stringify(data) : undefined 
+    });
+  
+  put = <T>(endpoint: string, data?: any) => 
+    this.request<T>(endpoint, { 
+      method: 'PUT', 
+      body: data ? JSON.stringify(data) : undefined 
+    });
+  
+  patch = <T>(endpoint: string, data?: any) => 
+    this.request<T>(endpoint, { 
+      method: 'PATCH', 
+      body: data ? JSON.stringify(data) : undefined 
+    });
+  
+  delete = <T>(endpoint: string) => 
+    this.request<T>(endpoint, { method: 'DELETE' });
+}
+
+export const apiClient = new ApiClient();

frontend/src/services/authService.ts

@@ -1,8 +1,5 @@
-// frontend/src/services/authService.ts - UPDATED
 import { Employee } from '../models/Employee';
-import { ErrorService } from './errorService';
+import { apiClient } from './apiClient';
-
-const API_BASE_URL = import.meta.env.VITE_API_URL || '/api';
 
 export interface LoginRequest {
   email: string;
@@ -25,31 +22,8 @@ export interface AuthResponse {
 class AuthService {
   private token: string | null = null;
 
-  private async handleApiResponse<T>(response: Response): Promise<T> {
-    if (!response.ok) {
-      const errorData = await response.json().catch(() => ({}));
-      const validationErrors = ErrorService.extractValidationErrors(errorData);
-
-      if (validationErrors.length > 0) {
-        const error = new Error('Validation failed');
-        (error as any).validationErrors = validationErrors;
-        throw error;
-      }
-
-      throw new Error(errorData.error || errorData.message || 'Authentication failed');
-    }
-
-    return response.json();
-  }
-
   async login(credentials: LoginRequest): Promise<AuthResponse> {
-    const response = await fetch(`${API_BASE_URL}/auth/login`, {
+    const data = await apiClient.post<AuthResponse>('/auth/login', credentials);
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify(credentials)
-    });
-
-    const data = await this.handleApiResponse<AuthResponse>(response);
     this.token = data.token;
     localStorage.setItem('token', data.token);
     localStorage.setItem('employee', JSON.stringify(data.employee));
@@ -57,13 +31,7 @@ class AuthService {
   }
 
   async register(userData: RegisterRequest): Promise<AuthResponse> {
-    const response = await fetch(`${API_BASE_URL}/employees`, {
+    await apiClient.post('/employees', userData);
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify(userData)
-    });
-
-    const data = await this.handleApiResponse<AuthResponse>(response);
     return this.login({
       email: userData.email,
       password: userData.password
@@ -77,28 +45,16 @@ class AuthService {
 
   async fetchCurrentEmployee(): Promise<Employee | null> {
     const token = this.getToken();
-    if (!token) {
+    if (!token) return null;
-      return null;
-    }
 
     try {
-      const response = await fetch(`${API_BASE_URL}/auth/me`, {
+      const data = await apiClient.get<{ user: Employee }>('/auth/me');
-        headers: {
+      localStorage.setItem('user', JSON.stringify(data.user));
-          'Authorization': `Bearer ${token}`
+      return data.user;
-        }
-      });
-
-      if (response.ok) {
-        const data = await response.json();
-        const user = data.user;
-        localStorage.setItem('user', JSON.stringify(user));
-        return user;
-      }
     } catch (error) {
       console.error('Error fetching current user:', error);
+      return null;
     }
-
-    return null;
   }
 
   logout(): void {

frontend/src/services/employeeService.ts

@@ -1,138 +1,58 @@
-// frontend/src/services/employeeService.ts
 import { Employee, CreateEmployeeRequest, UpdateEmployeeRequest, EmployeeAvailability } from '../models/Employee';
-import { ErrorService, ValidationError } from './errorService';
+import { apiClient } from './apiClient';
-
-const API_BASE_URL = '/api';
-
-const getAuthHeaders = () => {
-  const token = localStorage.getItem('token');
-  return {
-    'Content-Type': 'application/json',
-    'Authorization': `Bearer ${token}`
-  };
-};
 
 export class EmployeeService {
-  private async handleApiResponse<T>(response: Response): Promise<T> {
-    if (!response.ok) {
-      const errorData = await response.json().catch(() => ({}));
-      const validationErrors = ErrorService.extractValidationErrors(errorData);
-
-      if (validationErrors.length > 0) {
-        const error = new Error('Validation failed');
-        (error as any).validationErrors = validationErrors;
-        throw error;
-      }
-
-      throw new Error(errorData.error || errorData.message || `HTTP error! status: ${response.status}`);
-    }
-
-    return response.json();
-  }
-
   async getEmployees(includeInactive: boolean = false): Promise<Employee[]> {
     console.log('🔄 Fetching employees from API...');
 
-    const token = localStorage.getItem('token');
+    try {
-    console.log('🔑 Token exists:', !!token);
+      const employees = await apiClient.get<Employee[]>(`/employees?includeInactive=${includeInactive}`);
-
+      console.log('✅ Employees received:', employees.length);
-    const response = await fetch(`${API_BASE_URL}/employees?includeInactive=${includeInactive}`, {
+      return employees;
-      headers: getAuthHeaders(),
+    } catch (error) {
-    });
+      console.error('❌ Error fetching employees:', error);
-
+      throw error; // Let useBackendValidation handle this
-    console.log('📡 Response status:', response.status);
-
-    if (!response.ok) {
-      const errorText = await response.text();
-      console.error('❌ API Error:', errorText);
-      throw new Error('Failed to fetch employees');
     }
-
-    const employees = await response.json();
-    console.log('✅ Employees received:', employees.length);
-
-    return employees;
   }
 
   async getEmployee(id: string): Promise<Employee> {
-    const response = await fetch(`${API_BASE_URL}/employees/${id}`, {
+    return apiClient.get<Employee>(`/employees/${id}`);
-      headers: getAuthHeaders(),
-    });
-
-    return this.handleApiResponse<Employee>(response);
   }
 
   async createEmployee(employee: CreateEmployeeRequest): Promise<Employee> {
-    const response = await fetch(`${API_BASE_URL}/employees`, {
+    return apiClient.post<Employee>('/employees', employee);
-      method: 'POST',
-      headers: getAuthHeaders(),
-      body: JSON.stringify(employee),
-    });
-
-    return this.handleApiResponse<Employee>(response);
   }
 
   async updateEmployee(id: string, employee: UpdateEmployeeRequest): Promise<Employee> {
-    const response = await fetch(`${API_BASE_URL}/employees/${id}`, {
+    return apiClient.put<Employee>(`/employees/${id}`, employee);
-      method: 'PUT',
-      headers: getAuthHeaders(),
-      body: JSON.stringify(employee),
-    });
-
-    return this.handleApiResponse<Employee>(response);
   }
 
   async deleteEmployee(id: string): Promise<void> {
-    const response = await fetch(`${API_BASE_URL}/employees/${id}`, {
+    await apiClient.delete(`/employees/${id}`);
-      method: 'DELETE',
-      headers: getAuthHeaders(),
-    });
-
-    if (!response.ok) {
-      const error = await response.json();
-      throw new Error(error.error || 'Failed to delete employee');
-    }
   }
 
   async getAvailabilities(employeeId: string): Promise<EmployeeAvailability[]> {
-    const response = await fetch(`${API_BASE_URL}/employees/${employeeId}/availabilities`, {
+    return apiClient.get<EmployeeAvailability[]>(`/employees/${employeeId}/availabilities`);
-      headers: getAuthHeaders(),
-    });
-
-    return this.handleApiResponse<EmployeeAvailability[]>(response);
   }
 
-  async updateAvailabilities(employeeId: string, data: { planId: string, availabilities: Omit<EmployeeAvailability, 'id' | 'employeeId'>[] }): Promise<EmployeeAvailability[]> {
+  async updateAvailabilities(
+    employeeId: string, 
+    data: { planId: string, availabilities: Omit<EmployeeAvailability, 'id' | 'employeeId'>[] }
+  ): Promise<EmployeeAvailability[]> {
     console.log('🔄 Updating availabilities for employee:', employeeId);
-    const response = await fetch(`${API_BASE_URL}/employees/${employeeId}/availabilities`, {
+    return apiClient.put<EmployeeAvailability[]>(`/employees/${employeeId}/availabilities`, data);
-      method: 'PUT',
-      headers: getAuthHeaders(),
-      body: JSON.stringify(data),
-    });
-
-    return this.handleApiResponse<EmployeeAvailability[]>(response);
   }
 
-  async changePassword(id: string, data: { currentPassword: string, newPassword: string, confirmPassword: string }): Promise<void> {
+  async changePassword(
-    const response = await fetch(`${API_BASE_URL}/employees/${id}/password`, {
+    id: string, 
-      method: 'PUT',
+    data: { currentPassword: string, newPassword: string, confirmPassword: string }
-      headers: getAuthHeaders(),
+  ): Promise<void> {
-      body: JSON.stringify(data),
+    return apiClient.put<void>(`/employees/${id}/password`, data);
-    });
-
-    return this.handleApiResponse<void>(response);
   }
 
   async updateLastLogin(employeeId: string): Promise<void> {
     try {
-      const response = await fetch(`${API_BASE_URL}/employees/${employeeId}/last-login`, {
+      await apiClient.patch(`/employees/${employeeId}/last-login`);
-        method: 'PATCH',
-        headers: getAuthHeaders(),
-      });
-
-      if (!response.ok) {
-        throw new Error('Failed to update last login');
-      }
     } catch (error) {
       console.error('Error updating last login:', error);
       throw error;

frontend/src/services/shiftAssignmentService.ts

@@ -1,65 +1,15 @@
-// frontend/src/services/shiftAssignmentService.ts - WEEKLY PATTERN VERSION
 import { ShiftPlan, ScheduledShift } from '../models/ShiftPlan';
 import { Employee, EmployeeAvailability } from '../models/Employee';
-import { authService } from './authService';
 import { AssignmentResult, ScheduleRequest } from '../models/scheduling';
-
+import { apiClient } from './apiClient';
-const API_BASE_URL = '/api';
-
-// Helper function to get auth headers
-const getAuthHeaders = () => {
-  const token = localStorage.getItem('token');
-  return {
-    'Content-Type': 'application/json',
-    ...(token && { 'Authorization': `Bearer ${token}` })
-  };
-};
 
 export class ShiftAssignmentService {
   async updateScheduledShift(id: string, updates: { assignedEmployees: string[] }): Promise<void> {
     try {
-      //console.log('🔄 Updating scheduled shift via API:', { id, updates });
+      console.log('🔄 Updating scheduled shift via API:', { id, updates });
       
-      const response = await fetch(`${API_BASE_URL}/scheduled-shifts/${id}`, {
+      await apiClient.put(`/scheduled-shifts/${id}`, updates);
-        method: 'PUT',
+      console.log('✅ Scheduled shift updated successfully');
-        headers: {
-          'Content-Type': 'application/json',
-          ...authService.getAuthHeaders()
-        },
-        body: JSON.stringify(updates)
-      });
-
-      // First, check if we got any response
-      if (!response.ok) {
-        // Try to get error message from response
-        const responseText = await response.text();
-        console.error('❌ Server response:', responseText);
-        
-        let errorMessage = `HTTP ${response.status}: ${response.statusText}`;
-        
-        // Try to parse as JSON if possible
-        try {
-          const errorData = JSON.parse(responseText);
-          errorMessage = errorData.error || errorMessage;
-        } catch (e) {
-          // If not JSON, use the text as is
-          errorMessage = responseText || errorMessage;
-        }
-        
-        throw new Error(errorMessage);
-      }
-
-      // Try to parse successful response
-      const responseText = await response.text();
-      let result;
-      try {
-        result = responseText ? JSON.parse(responseText) : {};
-      } catch (e) {
-        console.warn('⚠️ Response was not JSON, but request succeeded');
-        result = { message: 'Update successful' };
-      }
-      
-      console.log('✅ Scheduled shift updated successfully:', result);
       
     } catch (error) {
       console.error('❌ Error updating scheduled shift:', error);
@@ -69,48 +19,16 @@ export class ShiftAssignmentService {
 
   async getScheduledShift(id: string): Promise<any> {
     try {
-      const response = await fetch(`${API_BASE_URL}/scheduled-shifts/${id}`, {
+      return await apiClient.get(`/scheduled-shifts/${id}`);
-        headers: {
-          'Authorization': `Bearer ${localStorage.getItem('token')}`
-        }
-      });
-
-      if (!response.ok) {
-        const responseText = await response.text();
-        let errorMessage = `HTTP ${response.status}: ${response.statusText}`;
-        
-        try {
-          const errorData = JSON.parse(responseText);
-          errorMessage = errorData.error || errorMessage;
-        } catch (e) {
-          errorMessage = responseText || errorMessage;
-        }
-        
-        throw new Error(errorMessage);
-      }
-
-      const responseText = await response.text();
-      return responseText ? JSON.parse(responseText) : {};
     } catch (error) {
       console.error('Error fetching scheduled shift:', error);
       throw error;
     }
   }
 
-  // New method to get all scheduled shifts for a plan
   async getScheduledShiftsForPlan(planId: string): Promise<ScheduledShift[]> {
     try {
-      const response = await fetch(`${API_BASE_URL}/scheduled-shifts/plan/${planId}`, {
+      const shifts = await apiClient.get<ScheduledShift[]>(`/scheduled-shifts/plan/${planId}`);
-        headers: {
-          'Authorization': `Bearer ${localStorage.getItem('token')}`
-        }
-      });
-
-      if (!response.ok) {
-        throw new Error(`Failed to fetch scheduled shifts: ${response.status}`);
-      }
-
-      const shifts = await response.json();
       
       // DEBUG: Check the structure of returned shifts
       console.log('🔍 SCHEDULED SHIFTS STRUCTURE:', shifts.slice(0, 3));
@@ -132,21 +50,7 @@ export class ShiftAssignmentService {
   }
 
   private async callSchedulingAPI(request: ScheduleRequest): Promise<AssignmentResult> {
-    const response = await fetch(`${API_BASE_URL}/scheduling/generate-schedule`, {
+    return await apiClient.post<AssignmentResult>('/scheduling/generate-schedule', request);
-      method: 'POST',
-      headers: {
-          'Content-Type': 'application/json',
-          ...authService.getAuthHeaders()
-        },
-      body: JSON.stringify(request)
-    });
-
-    if (!response.ok) {
-      const errorData = await response.json();
-      throw new Error(errorData.error || 'Scheduling failed');
-    }
-
-    return response.json();
   }
 
   async assignShifts(

frontend/src/services/shiftPlanService.ts

@@ -1,199 +1,115 @@
-// frontend/src/services/shiftPlanService.ts
-import { authService } from './authService';
 import { ShiftPlan, CreateShiftPlanRequest } from '../models/ShiftPlan';
-import { TEMPLATE_PRESETS } from '../models/defaults/shiftPlanDefaults';  
+import { TEMPLATE_PRESETS } from '../models/defaults/shiftPlanDefaults';
-
+import { apiClient } from './apiClient';
-const API_BASE_URL = '/api/shift-plans';
-
-// Helper function to get auth headers
-const getAuthHeaders = () => {
-  const token = localStorage.getItem('token');
-  return {
-    'Content-Type': 'application/json',
-    ...(token && { 'Authorization': `Bearer ${token}` })
-  };
-};
-
-// Helper function to handle responses
-const handleResponse = async (response: Response) => {
-  if (!response.ok) {
-    const errorData = await response.json().catch(() => ({ error: 'Unknown error' }));
-    throw new Error(errorData.error || `HTTP error! status: ${response.status}`);
-  }
-  return response.json();
-};
 
 export const shiftPlanService = {
   async getShiftPlans(): Promise<ShiftPlan[]> {
-    const response = await fetch(API_BASE_URL, {
+    try {
-      headers: {
+      const plans = await apiClient.get<ShiftPlan[]>('/shift-plans');
-        'Content-Type': 'application/json',
+      
-        ...authService.getAuthHeaders()
+      // Ensure scheduledShifts is always an array
-      }
+      return plans.map((plan: any) => ({
-    });
+        ...plan,
-    
+        scheduledShifts: plan.scheduledShifts || []
-    if (!response.ok) {
+      }));
-      if (response.status === 401) {
+    } catch (error: any) {
-        authService.logout();
+      if (error.statusCode === 401) {
+        // You might want to import and use authService here if needed
+        localStorage.removeItem('token');
+        localStorage.removeItem('employee');
         throw new Error('Nicht authorisiert - bitte erneut anmelden');
       }
       throw new Error('Fehler beim Laden der Schichtpläne');
     }
-    
-    const plans = await response.json();
-    
-    // Ensure scheduledShifts is always an array
-    return plans.map((plan: any) => ({
-      ...plan,
-      scheduledShifts: plan.scheduledShifts || []
-    }));
   },
 
   async getShiftPlan(id: string): Promise<ShiftPlan> {
-    const response = await fetch(`${API_BASE_URL}/${id}`, {
+    try {
-      headers: {
+      return await apiClient.get<ShiftPlan>(`/shift-plans/${id}`);
-        'Content-Type': 'application/json',
+    } catch (error: any) {
-        ...authService.getAuthHeaders()
+      if (error.statusCode === 401) {
-      }
+        localStorage.removeItem('token');
-    });
+        localStorage.removeItem('employee');
-    
-    if (!response.ok) {
-      if (response.status === 401) {
-        authService.logout();
         throw new Error('Nicht authorisiert - bitte erneut anmelden');
       }
       throw new Error('Schichtplan nicht gefunden');
     }
-    
-    return await response.json();
   },
 
   async createShiftPlan(plan: CreateShiftPlanRequest): Promise<ShiftPlan> {
-    const response = await fetch(API_BASE_URL, {
+    try {
-      method: 'POST',
+      return await apiClient.post<ShiftPlan>('/shift-plans', plan);
-      headers: {
+    } catch (error: any) {
-        'Content-Type': 'application/json',
+      if (error.statusCode === 401) {
-        ...authService.getAuthHeaders()
+        localStorage.removeItem('token');
-      },
+        localStorage.removeItem('employee');
-      body: JSON.stringify(plan)
-    });
-
-    if (!response.ok) {
-      if (response.status === 401) {
-        authService.logout();
         throw new Error('Nicht authorisiert - bitte erneut anmelden');
       }
       throw new Error('Fehler beim Erstellen des Schichtplans');
     }
-
-    return response.json();
   },
 
   async updateShiftPlan(id: string, plan: Partial<ShiftPlan>): Promise<ShiftPlan> {
-    const response = await fetch(`${API_BASE_URL}/${id}`, {
+    try {
-      method: 'PUT',
+      return await apiClient.put<ShiftPlan>(`/shift-plans/${id}`, plan);
-      headers: {
+    } catch (error: any) {
-        'Content-Type': 'application/json',
+      if (error.statusCode === 401) {
-        ...authService.getAuthHeaders()
+        localStorage.removeItem('token');
-      },
+        localStorage.removeItem('employee');
-      body: JSON.stringify(plan)
-    });
-
-    if (!response.ok) {
-      if (response.status === 401) {
-        authService.logout();
         throw new Error('Nicht authorisiert - bitte erneut anmelden');
       }
       throw new Error('Fehler beim Aktualisieren des Schichtplans');
     }
-
-    return response.json();
   },
 
   async deleteShiftPlan(id: string): Promise<void> {
-    const response = await fetch(`${API_BASE_URL}/${id}`, {
+    try {
-      method: 'DELETE',
+      await apiClient.delete(`/shift-plans/${id}`);
-      headers: {
+    } catch (error: any) {
-        'Content-Type': 'application/json',
+      if (error.statusCode === 401) {
-        ...authService.getAuthHeaders()
+        localStorage.removeItem('token');
-      }
+        localStorage.removeItem('employee');
-    });
-
-    if (!response.ok) {
-      if (response.status === 401) {
-        authService.logout();
         throw new Error('Nicht authorisiert - bitte erneut anmelden');
       }
       throw new Error('Fehler beim Löschen des Schichtplans');
     }
   },
 
-  // Get specific template or plan
+  async getTemplate(id: string): Promise<ShiftPlan> {
-  getTemplate: async (id: string): Promise<ShiftPlan> => {
+    return await apiClient.get<ShiftPlan>(`/shift-plans/${id}`);
-    const response = await fetch(`${API_BASE_URL}/${id}`, {
-      headers: getAuthHeaders()
-    });
-    return handleResponse(response);
   },
 
-
+  async regenerateScheduledShifts(planId: string): Promise<void> {
-  async regenerateScheduledShifts(planId: string):Promise<void> {
     try {
-        console.log('🔄 Attempting to regenerate scheduled shifts...');
+      console.log('🔄 Attempting to regenerate scheduled shifts...');
-        
+      await apiClient.post(`/shift-plans/${planId}/regenerate-shifts`);
-        // You'll need to add this API endpoint to your backend
+      console.log('✅ Scheduled shifts regenerated');
-        const response = await fetch(`${API_BASE_URL}/${planId}/regenerate-shifts`, {
-        method: 'POST',
-        headers: {
-            'Content-Type': 'application/json',
-            'Authorization': `Bearer ${localStorage.getItem('token')}`
-        }
-        });
-
-        if (response.ok) {
-        console.log('✅ Scheduled shifts regenerated');
-        } else {
-        console.error('❌ Failed to regenerate shifts');
-        }
     } catch (error) {
-        console.error('❌ Error regenerating shifts:', error);
+      console.error('❌ Error regenerating shifts:', error);
+      throw error;
     }
   },
 
-  // Create new plan
+  async createPlan(data: CreateShiftPlanRequest): Promise<ShiftPlan> {
-  createPlan: async (data: CreateShiftPlanRequest): Promise<ShiftPlan> => {
+    return await apiClient.post<ShiftPlan>('/shift-plans', data);
-    const response = await fetch(`${API_BASE_URL}`, {
-      method: 'POST',
-      headers: getAuthHeaders(),
-      body: JSON.stringify(data),
-    });
-    return handleResponse(response);
   },
 
-  createFromPreset: async (data: {
+  async createFromPreset(data: {
     presetName: string;
     name: string;
     startDate: string;
     endDate: string;
     isTemplate?: boolean;
-  }): Promise<ShiftPlan> => {
+  }): Promise<ShiftPlan> {
-    const response = await fetch(`${API_BASE_URL}/from-preset`, {
+    try {
-      method: 'POST',
+      return await apiClient.post<ShiftPlan>('/shift-plans/from-preset', data);
-      headers: getAuthHeaders(),
+    } catch (error: any) {
-      body: JSON.stringify(data),
+      throw new Error(error.message || `HTTP error! status: ${error.statusCode}`);
-    });
-    
-    if (!response.ok) {
-      const errorData = await response.json().catch(() => ({ error: 'Unknown error' }));
-      throw new Error(errorData.error || `HTTP error! status: ${response.status}`);
     }
-    
-    return response.json();
   },
 
-  getTemplatePresets: async (): Promise<{name: string, label: string, description: string}[]> => {
+  async getTemplatePresets(): Promise<{name: string, label: string, description: string}[]> {
-    // name = label
+    return Object.entries(TEMPLATE_PRESETS).map(([key, preset]) => ({
-     return Object.entries(TEMPLATE_PRESETS).map(([key, preset]) => ({
       name: key,
       label: preset.name,
       description: preset.description
@@ -203,22 +119,8 @@ export const shiftPlanService = {
   async clearAssignments(planId: string): Promise<void> {
     try {
       console.log('🔄 Clearing assignments for plan:', planId);
-      
+      await apiClient.post(`/shift-plans/${planId}/clear-assignments`);
-      const response = await fetch(`${API_BASE_URL}/${planId}/clear-assignments`, {
-        method: 'POST',
-        headers: {
-          'Content-Type': 'application/json',
-          ...authService.getAuthHeaders()
-        }
-      });
-
-      if (!response.ok) {
-        const errorData = await response.json().catch(() => ({ error: 'Unknown error' }));
-        throw new Error(errorData.error || `Failed to clear assignments: ${response.status}`);
-      }
-
       console.log('✅ Assignments cleared successfully');
-      
     } catch (error) {
       console.error('❌ Error clearing assignments:', error);
       throw error;

frontend/vite.config.ts

@@ -59,7 +59,13 @@ export default defineConfig(({ mode }) => {
     resolve: {
       alias: {
         '@': resolve(__dirname, './src'),
-        // ... other aliases
+        '@/components': resolve(__dirname, './src/components'),
+        '@/pages': resolve(__dirname, './src/pages'),
+        '@/contexts': resolve(__dirname, './src/contexts'),
+        '@/models': resolve(__dirname, './src/models'),
+        '@/utils': resolve(__dirname, './src/utils'),
+        '@/services': resolve(__dirname, './src/services'),
+        '@/design': resolve(__dirname, './src/design')
       }
     },