fixed settings

backend/src/controllers/employeeController.ts

@@ -7,9 +7,20 @@ import { AuthRequest } from '../middleware/auth.js';
 import { CreateEmployeeRequest } from '../models/Employee.js';
 
 function generateEmail(firstname: string, lastname: string): string {
-  // Remove special characters and convert to lowercase
+  // Convert German umlauts to their expanded forms
-  const cleanFirstname = firstname.toLowerCase().replace(/[^a-z0-9]/g, '');
+  const convertUmlauts = (str: string): string => {
-  const cleanLastname = lastname.toLowerCase().replace(/[^a-z0-9]/g, '');
+    return str
+      .toLowerCase()
+      .replace(/ü/g, 'ue')
+      .replace(/ö/g, 'oe')
+      .replace(/ä/g, 'ae')
+      .replace(/ß/g, 'ss');
+  };
+
+  // Remove any remaining special characters and convert to lowercase
+  const cleanFirstname = convertUmlauts(firstname).replace(/[^a-z0-9]/g, '');
+  const cleanLastname = convertUmlauts(lastname).replace(/[^a-z0-9]/g, '');
+  
   return `${cleanFirstname}.${cleanLastname}@sp.de`;
 }
 

backend/src/database/schema.sql

@@ -104,11 +104,14 @@ CREATE TABLE IF NOT EXISTS employee_availability (
   UNIQUE(employee_id, plan_id, shift_id)
 );
 
--- Performance indexes
+-- Performance indexes (UPDATED - removed role index from employees)
-CREATE INDEX IF NOT EXISTS idx_employees_role_active ON employees(role, is_active);
 CREATE INDEX IF NOT EXISTS idx_employees_email_active ON employees(email, is_active);
 CREATE INDEX IF NOT EXISTS idx_employees_type_active ON employees(employee_type, is_active);
 
+-- Index for employee_roles table (NEW)
+CREATE INDEX IF NOT EXISTS idx_employee_roles_employee ON employee_roles(employee_id);
+CREATE INDEX IF NOT EXISTS idx_employee_roles_role ON employee_roles(role);
+
 CREATE INDEX IF NOT EXISTS idx_shift_plans_status_date ON shift_plans(status, start_date, end_date);
 CREATE INDEX IF NOT EXISTS idx_shift_plans_created_by ON shift_plans(created_by);
 CREATE INDEX IF NOT EXISTS idx_shift_plans_template ON shift_plans(is_template, status);

backend/src/models/defaults/employeeDefaults.ts

@@ -14,7 +14,7 @@ export const EMPLOYEE_DEFAULTS = {
 export const MANAGER_DEFAULTS = {
   role: 'admin' as const,
   employeeType: 'manager' as const,
-  contractType: 'large' as const, // Not really used but required by DB
+  contractType: 'large' as const,
   canWorkAlone: true,
   isActive: true
 };
@@ -64,26 +64,25 @@ export const AVAILABILITY_PREFERENCES = {
 } as const;
 
 // Default availability for new employees (all shifts unavailable as level 3)
-export function createDefaultAvailabilities(employeeId: string, planId: string, timeSlotIds: string[]): Omit<EmployeeAvailability, 'id'>[] {
+// UPDATED: Now uses shiftId instead of timeSlotId + dayOfWeek
+export function createDefaultAvailabilities(employeeId: string, planId: string, shiftIds: string[]): Omit<EmployeeAvailability, 'id'>[] {
   const availabilities: Omit<EmployeeAvailability, 'id'>[] = [];
   
-  // Monday to Friday (1-5)
+  // Create one availability entry per shift
-  for (let day = 1; day <= 5; day++) {
+  for (const shiftId of shiftIds) {
-    for (const timeSlotId of timeSlotIds) {
+    availabilities.push({
-      availabilities.push({
+      employeeId,
-        employeeId,
+      planId,
-        planId,
+      shiftId,
-        dayOfWeek: day,
+      preferenceLevel: 3 // Default to "unavailable" - employees must explicitly set availability
-        timeSlotId,
+    });
-        preferenceLevel: 3 // Default to "unavailable" - employees must explicitly set availability
-      });
-    }
   }
   
   return availabilities;
 }
 
 // Create complete manager availability for all days (default: only Mon-Tue available)
+// NOTE: This function might need revision based on new schema requirements
 export function createManagerDefaultSchedule(managerId: string, planId: string, timeSlotIds: string[]): Omit<ManagerAvailability, 'id'>[] {
   const assignments: Omit<ManagerAvailability, 'id'>[] = [];
   

backend/src/models/helpers/employeeHelpers.ts

@@ -1,25 +1,51 @@
 // backend/src/models/helpers/employeeHelpers.ts
 import { Employee, CreateEmployeeRequest, EmployeeAvailability } from '../Employee.js';
 
-// Simplified validation - use schema validation instead
+// Email generation function (same as in controllers)
+function generateEmail(firstname: string, lastname: string): string {
+  // Convert German umlauts to their expanded forms
+  const convertUmlauts = (str: string): string => {
+    return str
+      .toLowerCase()
+      .replace(/ü/g, 'ue')
+      .replace(/ö/g, 'oe')
+      .replace(/ä/g, 'ae')
+      .replace(/ß/g, 'ss');
+  };
+
+  // Remove any remaining special characters and convert to lowercase
+  const cleanFirstname = convertUmlauts(firstname).replace(/[^a-z0-9]/g, '');
+  const cleanLastname = convertUmlauts(lastname).replace(/[^a-z0-9]/g, '');
+  
+  return `${cleanFirstname}.${cleanLastname}@sp.de`;
+}
+
+// UPDATED: Validation for new employee model
 export function validateEmployeeData(employee: CreateEmployeeRequest): string[] {
   const errors: string[] = [];
 
-  if (!employee.email?.includes('@')) {
+  // Email is now auto-generated, so no email validation needed
-    errors.push('Valid email is required');
-  }
   
   if (employee.password?.length < 6) {
     errors.push('Password must be at least 6 characters long');
   }
 
-  if (!employee.name?.trim() || employee.name.trim().length < 2) {
+  if (!employee.firstname?.trim() || employee.firstname.trim().length < 2) {
-    errors.push('Name is required and must be at least 2 characters long');
+    errors.push('First name is required and must be at least 2 characters long');
+  }
+
+  if (!employee.lastname?.trim() || employee.lastname.trim().length < 2) {
+    errors.push('Last name is required and must be at least 2 characters long');
   }
 
   return errors;
 }
 
+// Generate email for employee (new helper function)
+export function generateEmployeeEmail(firstname: string, lastname: string): string {
+  return generateEmail(firstname, lastname);
+}
+
 // Simplified business logic helpers
 export const isManager = (employee: Employee): boolean => 
   employee.employeeType === 'manager';
@@ -38,3 +64,26 @@ export const canEmployeeWorkAlone = (employee: Employee): boolean =>
 
 export const getEmployeeWorkHours = (employee: Employee): number =>
   isManager(employee) ? 999 : (employee.contractType === 'small' ? 1 : 2);
+
+// New helper for full name display
+export const getFullName = (employee: { firstname: string; lastname: string }): string =>
+  `${employee.firstname} ${employee.lastname}`;
+
+// Helper for availability validation
+export function validateAvailabilityData(availability: Omit<EmployeeAvailability, 'id' | 'employeeId'>): string[] {
+  const errors: string[] = [];
+
+  if (!availability.planId) {
+    errors.push('Plan ID is required');
+  }
+
+  if (!availability.shiftId) {
+    errors.push('Shift ID is required');
+  }
+
+  if (![1, 2, 3].includes(availability.preferenceLevel)) {
+    errors.push('Preference level must be 1, 2, or 3');
+  }
+
+  return errors;
+}

backend/src/models/helpers/shiftPlanHelpers.ts

@@ -78,7 +78,8 @@ export function calculateTotalRequiredEmployees(plan: ShiftPlan): number {
   return plan.shifts.reduce((total, shift) => total + shift.requiredEmployees, 0);
 }
 
-/*export function getScheduledShiftByDateAndTime(
+// UPDATED: Get scheduled shift by date and time slot
+export function getScheduledShiftByDateAndTime(
   plan: ShiftPlan, 
   date: string, 
   timeSlotId: string
@@ -86,7 +87,7 @@ export function calculateTotalRequiredEmployees(plan: ShiftPlan): number {
   return plan.scheduledShifts?.find(shift => 
     shift.date === date && shift.timeSlotId === timeSlotId
   );
-}*/
+}
 
 export function canPublishPlan(plan: ShiftPlan): { canPublish: boolean; errors: string[] } {
   const errors: string[] = [];
@@ -116,3 +117,13 @@ export function canPublishPlan(plan: ShiftPlan): { canPublish: boolean; errors:
     errors
   };
 }
+
+// NEW: Helper for shift generation
+export function generateShiftId(): string {
+  return `shift_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
+}
+
+// NEW: Helper for time slot generation
+export function generateTimeSlotId(): string {
+  return `timeslot_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
+}

frontend/src/contexts/AuthContext.tsx

@@ -16,7 +16,7 @@ interface AuthContextType {
   refreshUser: () => void;
   needsSetup: boolean;
   checkSetupStatus: () => Promise<void>;
-  updateUser: (userData: Employee) => void; // Add this line
+  updateUser: (userData: Employee) => void;
 }
 
 const AuthContext = createContext<AuthContextType | undefined>(undefined);

frontend/src/models/defaults/employeeDefaults.ts

@@ -14,39 +14,39 @@ export const EMPLOYEE_DEFAULTS = {
 export const MANAGER_DEFAULTS = {
   role: 'admin' as const,
   employeeType: 'manager' as const,
-  contractType: 'large' as const, // Not really used but required by DB
+  contractType: 'large' as const,
   canWorkAlone: true,
   isActive: true
 };
 
-export const EMPLOYEE_TYPE_CONFIG = [
+export const EMPLOYEE_TYPE_CONFIG = {
-  {
+  manager: { 
     value: 'manager' as const,
     label: 'Chef/Administrator', 
     color: '#e74c3c',
     independent: true,
     description: 'Vollzugriff auf alle Funktionen und Mitarbeiterverwaltung'
   },
-  {
+  experienced: { 
     value: 'experienced' as const,
     label: 'Erfahren', 
     color: '#3498db',
     independent: true,
     description: 'Langjährige Erfahrung, kann komplexe Aufgaben übernehmen'
   },
-  { 
+  trainee: { 
     value: 'trainee' as const,
     label: 'Neuling', 
     color: '#27ae60', 
     independent: false,
     description: 'Benötigt Einarbeitung und Unterstützung'
   }
- ] as const;
+} as const;
 
 export const ROLE_CONFIG = [
-  { value: 'user', label: 'Mitarbeiter', description: 'Kann eigene Schichten einsehen', color: '#27ae60' },
+  { value: 'user' as const, label: 'Mitarbeiter', description: 'Kann eigene Schichten einsehen', color: '#27ae60' },
-  { value: 'maintenance', label: 'Instandhalter', description: 'Kann Schichtpläne erstellen und Mitarbeiter verwalten', color: '#3498db' },
+  { value: 'maintenance' as const, label: 'Instandhalter', description: 'Kann Schichtpläne erstellen und Mitarbeiter verwalten', color: '#3498db' },
-  { value: 'admin', label: 'Administrator', description: 'Voller Zugriff auf alle Funktionen', color: '#e74c3c' }
+  { value: 'admin' as const, label: 'Administrator', description: 'Voller Zugriff auf alle Funktionen', color: '#e74c3c' }
 ] as const;
 
 // Contract type descriptions
@@ -64,26 +64,25 @@ export const AVAILABILITY_PREFERENCES = {
 } as const;
 
 // Default availability for new employees (all shifts unavailable as level 3)
-export function createDefaultAvailabilities(employeeId: string, planId: string, timeSlotIds: string[]): Omit<EmployeeAvailability, 'id'>[] {
+// UPDATED: Now uses shiftId instead of timeSlotId + dayOfWeek
+export function createDefaultAvailabilities(employeeId: string, planId: string, shiftIds: string[]): Omit<EmployeeAvailability, 'id'>[] {
   const availabilities: Omit<EmployeeAvailability, 'id'>[] = [];
   
-  // Monday to Friday (1-5)
+  // Create one availability entry per shift
-  for (let day = 1; day <= 5; day++) {
+  for (const shiftId of shiftIds) {
-    for (const timeSlotId of timeSlotIds) {
+    availabilities.push({
-      availabilities.push({
+      employeeId,
-        employeeId,
+      planId,
-        planId,
+      shiftId,
-        dayOfWeek: day,
+      preferenceLevel: 3 // Default to "unavailable" - employees must explicitly set availability
-        timeSlotId,
+    });
-        preferenceLevel: 3 // Default to "unavailable" - employees must explicitly set availability
-      });
-    }
   }
   
   return availabilities;
 }
 
 // Create complete manager availability for all days (default: only Mon-Tue available)
+// NOTE: This function might need revision based on new schema requirements
 export function createManagerDefaultSchedule(managerId: string, planId: string, timeSlotIds: string[]): Omit<ManagerAvailability, 'id'>[] {
   const assignments: Omit<ManagerAvailability, 'id'>[] = [];
   

frontend/src/models/helpers/employeeHelpers.ts

@@ -1,25 +1,51 @@
 // backend/src/models/helpers/employeeHelpers.ts
 import { Employee, CreateEmployeeRequest, EmployeeAvailability } from '../Employee.js';
 
-// Simplified validation - use schema validation instead
+// Email generation function (same as in controllers)
+function generateEmail(firstname: string, lastname: string): string {
+  // Convert German umlauts to their expanded forms
+  const convertUmlauts = (str: string): string => {
+    return str
+      .toLowerCase()
+      .replace(/ü/g, 'ue')
+      .replace(/ö/g, 'oe')
+      .replace(/ä/g, 'ae')
+      .replace(/ß/g, 'ss');
+  };
+
+  // Remove any remaining special characters and convert to lowercase
+  const cleanFirstname = convertUmlauts(firstname).replace(/[^a-z0-9]/g, '');
+  const cleanLastname = convertUmlauts(lastname).replace(/[^a-z0-9]/g, '');
+  
+  return `${cleanFirstname}.${cleanLastname}@sp.de`;
+}
+
+// UPDATED: Validation for new employee model
 export function validateEmployeeData(employee: CreateEmployeeRequest): string[] {
   const errors: string[] = [];
 
-  if (!employee.email?.includes('@')) {
+  // Email is now auto-generated, so no email validation needed
-    errors.push('Valid email is required');
-  }
   
   if (employee.password?.length < 6) {
     errors.push('Password must be at least 6 characters long');
   }
 
-  if (!employee.name?.trim() || employee.name.trim().length < 2) {
+  if (!employee.firstname?.trim() || employee.firstname.trim().length < 2) {
-    errors.push('Name is required and must be at least 2 characters long');
+    errors.push('First name is required and must be at least 2 characters long');
+  }
+
+  if (!employee.lastname?.trim() || employee.lastname.trim().length < 2) {
+    errors.push('Last name is required and must be at least 2 characters long');
   }
 
   return errors;
 }
 
+// Generate email for employee (new helper function)
+export function generateEmployeeEmail(firstname: string, lastname: string): string {
+  return generateEmail(firstname, lastname);
+}
+
 // Simplified business logic helpers
 export const isManager = (employee: Employee): boolean => 
   employee.employeeType === 'manager';
@@ -38,3 +64,26 @@ export const canEmployeeWorkAlone = (employee: Employee): boolean =>
 
 export const getEmployeeWorkHours = (employee: Employee): number =>
   isManager(employee) ? 999 : (employee.contractType === 'small' ? 1 : 2);
+
+// New helper for full name display
+export const getFullName = (employee: { firstname: string; lastname: string }): string =>
+  `${employee.firstname} ${employee.lastname}`;
+
+// Helper for availability validation
+export function validateAvailabilityData(availability: Omit<EmployeeAvailability, 'id' | 'employeeId'>): string[] {
+  const errors: string[] = [];
+
+  if (!availability.planId) {
+    errors.push('Plan ID is required');
+  }
+
+  if (!availability.shiftId) {
+    errors.push('Shift ID is required');
+  }
+
+  if (![1, 2, 3].includes(availability.preferenceLevel)) {
+    errors.push('Preference level must be 1, 2, or 3');
+  }
+
+  return errors;
+}

frontend/src/models/helpers/shiftPlanHelpers.ts

@@ -1,5 +1,4 @@
 // backend/src/models/helpers/shiftPlanHelpers.ts
-import { shiftAssignmentService } from '../../services/shiftAssignmentService.js';
 import { ShiftPlan, Shift, ScheduledShift, TimeSlot } from '../ShiftPlan.js';
 
 // Validation helpers
@@ -79,16 +78,16 @@ export function calculateTotalRequiredEmployees(plan: ShiftPlan): number {
   return plan.shifts.reduce((total, shift) => total + shift.requiredEmployees, 0);
 }
 
-/*export async function getScheduledShiftByDateAndTime(
+// UPDATED: Get scheduled shift by date and time slot
+export function getScheduledShiftByDateAndTime(
   plan: ShiftPlan, 
   date: string, 
   timeSlotId: string
-): Promise<ScheduledShift | undefined> {
+): ScheduledShift | undefined {
-  const scheduledShifts = await shiftAssignmentService.getScheduledShiftsForPlan(plan.id);
+  return plan.scheduledShifts?.find(shift => 
-  return scheduledShifts.find(
+    shift.date === date && shift.timeSlotId === timeSlotId
-    shift => shift.date === date && shift.timeSlotId === timeSlotId
   );
-}*/
+}
 
 export function canPublishPlan(plan: ShiftPlan): { canPublish: boolean; errors: string[] } {
   const errors: string[] = [];
@@ -118,3 +117,13 @@ export function canPublishPlan(plan: ShiftPlan): { canPublish: boolean; errors:
     errors
   };
 }
+
+// NEW: Helper for shift generation
+export function generateShiftId(): string {
+  return `shift_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
+}
+
+// NEW: Helper for time slot generation
+export function generateTimeSlotId(): string {
+  return `timeslot_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
+}

frontend/src/pages/Settings/Settings.tsx

@@ -14,9 +14,10 @@ const Settings: React.FC = () => {
   const [loading, setLoading] = useState(false);
   const [showAvailabilityManager, setShowAvailabilityManager] = useState(false);
   
-  // Profile form state
+  // Profile form state - updated for firstname/lastname
   const [profileForm, setProfileForm] = useState({
-    name: currentUser?.name || ''
+    firstname: currentUser?.firstname || '',
+    lastname: currentUser?.lastname || ''
   });
 
   // Password form state
@@ -29,7 +30,8 @@ const Settings: React.FC = () => {
   useEffect(() => {
     if (currentUser) {
       setProfileForm({
-        name: currentUser.name
+        firstname: currentUser.firstname || '',
+        lastname: currentUser.lastname || ''
       });
     }
   }, [currentUser]);
@@ -54,10 +56,21 @@ const Settings: React.FC = () => {
     e.preventDefault();
     if (!currentUser) return;
 
+    // Validation
+    if (!profileForm.firstname.trim() || !profileForm.lastname.trim()) {
+      showNotification({
+        type: 'error',
+        title: 'Fehler',
+        message: 'Vorname und Nachname sind erforderlich'
+      });
+      return;
+    }
+
     try {
       setLoading(true);
       await employeeService.updateEmployee(currentUser.id, {
-        name: profileForm.name.trim()
+        firstname: profileForm.firstname.trim(),
+        lastname: profileForm.lastname.trim()
       });
 
       // Update the auth context with new user data
@@ -167,8 +180,10 @@ const Settings: React.FC = () => {
     );
   }
 
-  // Style constants for consistency
+  // Get full name for display
-
+  const getFullName = () => {
+    return `${currentUser.firstname || ''} ${currentUser.lastname || ''}`.trim();
+  };
 
   return (
     <div style={styles.container}>
@@ -294,6 +309,9 @@ const Settings: React.FC = () => {
                         disabled
                         style={styles.fieldInputDisabled}
                       />
+                      <div style={styles.fieldHint}>
+                        E-Mail wird automatisch aus Vor- und Nachname generiert
+                      </div>
                     </div>
                     <div style={styles.field}>
                       <label style={styles.fieldLabel}>
@@ -331,31 +349,61 @@ const Settings: React.FC = () => {
                   </div>
                 </div>
                 <div style={styles.infoCard}>
-                  {/* Editable name field */}
+                  <h4 style={styles.infoCardTitle}>Persönliche Informationen</h4>
-                  <div style={{ ...styles.field, marginTop: '1rem' }}>
+                  {/* Editable name fields */}
-                    <label style={styles.fieldLabel}>
+                  <div style={{ display: 'grid', gridTemplateColumns: '1fr 1fr', gap: '1rem' }}>
-                      Vollständiger Name *
+                    <div style={styles.field}>
-                    </label>
+                      <label style={styles.fieldLabel}>
-                    <input
+                        Vorname *
-                      type="text"
+                      </label>
-                      name="name"
+                      <input
-                      value={profileForm.name}
+                        type="text"
-                      onChange={handleProfileChange}
+                        name="firstname"
-                      required
+                        value={profileForm.firstname}
-                      style={{
+                        onChange={handleProfileChange}
-                        ...styles.fieldInput,
+                        required
-                        width: '95%'
+                        style={styles.fieldInput}
-                      }}
+                        placeholder="Ihr Vorname"
-                      placeholder="Ihr vollständiger Name"
+                        onFocus={(e) => {
-                      onFocus={(e) => {
+                          e.target.style.borderColor = '#1a1325';
-                        e.target.style.borderColor = '#1a1325';
+                          e.target.style.boxShadow = '0 0 0 3px rgba(26, 19, 37, 0.1)';
-                        e.target.style.boxShadow = '0 0 0 3px rgba(26, 19, 37, 0.1)';
+                        }}
-                      }}
+                        onBlur={(e) => {
-                      onBlur={(e) => {
+                          e.target.style.borderColor = '#e8e8e8';
-                        e.target.style.borderColor = '#e8e8e8';
+                          e.target.style.boxShadow = 'none';
-                        e.target.style.boxShadow = 'none';
+                        }}
-                      }}
+                      />
-                    />
+                    </div>
+                    <div style={styles.field}>
+                      <label style={styles.fieldLabel}>
+                        Nachname *
+                      </label>
+                      <input
+                        type="text"
+                        name="lastname"
+                        value={profileForm.lastname}
+                        onChange={handleProfileChange}
+                        required
+                        style={styles.fieldInput}
+                        placeholder="Ihr Nachname"
+                        onFocus={(e) => {
+                          e.target.style.borderColor = '#1a1325';
+                          e.target.style.boxShadow = '0 0 0 3px rgba(26, 19, 37, 0.1)';
+                        }}
+                        onBlur={(e) => {
+                          e.target.style.borderColor = '#e8e8e8';
+                          e.target.style.boxShadow = 'none';
+                        }}
+                      />
+                    </div>
+                  </div>
+                  <div style={{ marginTop: '1rem', padding: '1rem', background: '#f8f9fa', borderRadius: '8px' }}>
+                    <div style={{ fontSize: '0.9rem', color: '#666' }}>
+                      <strong>Vorschau:</strong> {getFullName() || '(Kein Name)'}
+                    </div>
+                    <div style={{ fontSize: '0.8rem', color: '#888', marginTop: '0.5rem' }}>
+                      E-Mail: {currentUser.email}
+                    </div>
                   </div>
                 </div>
               </div>
@@ -363,21 +411,21 @@ const Settings: React.FC = () => {
               <div style={styles.actions}>
                 <button
                   type="submit"
-                  disabled={loading || !profileForm.name.trim()}
+                  disabled={loading || !profileForm.firstname.trim() || !profileForm.lastname.trim()}
                   style={{
                     ...styles.button,
                     ...styles.buttonPrimary,
-                    ...((loading || !profileForm.name.trim()) ? styles.buttonDisabled : {})
+                    ...((loading || !profileForm.firstname.trim() || !profileForm.lastname.trim()) ? styles.buttonDisabled : {})
                   }}
                   onMouseEnter={(e) => {
-                    if (!loading && profileForm.name.trim()) {
+                    if (!loading && profileForm.firstname.trim() && profileForm.lastname.trim()) {
                       e.currentTarget.style.background = styles.buttonPrimaryHover.background;
                       e.currentTarget.style.transform = styles.buttonPrimaryHover.transform;
                       e.currentTarget.style.boxShadow = styles.buttonPrimaryHover.boxShadow;
                     }
                   }}
                   onMouseLeave={(e) => {
-                    if (!loading && profileForm.name.trim()) {
+                    if (!loading && profileForm.firstname.trim() && profileForm.lastname.trim()) {
                       e.currentTarget.style.background = styles.buttonPrimary.background;
                       e.currentTarget.style.transform = 'none';
                       e.currentTarget.style.boxShadow = styles.buttonPrimary.boxShadow;

frontend/src/pages/ShiftPlans/ShiftPlanView.tsx

@@ -550,7 +550,7 @@ const ShiftPlanView: React.FC = () => {
           try {
             return await employeeService.getAvailabilities(emp.id);
           } catch (error) {
-            console.error(`❌ Failed to load availabilities for ${emp.name}:`, error);
+            console.error(`❌ Failed to load availabilities for ${emp.email}:`, error);
             return []; // Return empty array instead of failing entire operation
           }
         });
@@ -599,7 +599,7 @@ const ShiftPlanView: React.FC = () => {
       );
       
       console.warn('⚠️ Missing availabilities for employees:', 
-        missingEmployees.map(emp => emp.name));
+        missingEmployees.map(emp => emp.email));
       
       return false;
     }
@@ -806,7 +806,7 @@ const ShiftPlanView: React.FC = () => {
                         
                         displayText = assignedEmployees.map(empId => {
                           const employee = employees.find(emp => emp.id === empId);
-                          return employee ? employee.name : 'Unbekannt';
+                          return employee ? employee.email : 'Unbekannt';
                         }).join(', ');
                       }
                     } else if (assignmentResult) {
@@ -821,7 +821,7 @@ const ShiftPlanView: React.FC = () => {
                         assignedEmployees = getAssignmentsForScheduledShift(scheduledShift);
                         displayText = assignedEmployees.map(empId => {
                           const employee = employees.find(emp => emp.id === empId);
-                          return employee ? employee.name : 'Unbekannt';
+                          return employee ? employee.email : 'Unbekannt';
                         }).join(', ');
                       }
                     }