feat: Add specific shift date field for multi-day events with date selector in EventEditor and date badge in ShiftMatrix

backend/apps/events/migrations/0004_shift_date.py

@@ -0,0 +1,18 @@
+# Generated by Django 6.0.7 on 2026-07-31 08:51
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('events', '0003_event_is_active'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='shift',
+            name='date',
+            field=models.DateField(blank=True, help_text='Spezifisches Datum für mehrtägige Veranstaltungen', null=True),
+        ),
+    ]

backend/apps/events/models.py

@@ -39,13 +39,15 @@ class TaskArea(models.Model):
 class Shift(models.Model):
     task_area = models.ForeignKey(TaskArea, on_delete=models.CASCADE, related_name='shifts')
     title = models.CharField(max_length=150)  # e.g., "Frühschicht", "14:00 - 18:00"
+    date = models.DateField(null=True, blank=True, help_text="Spezifisches Datum für mehrtägige Veranstaltungen")
     start_time = models.CharField(max_length=50)  # e.g. "14:00" or ISO string
     end_time = models.CharField(max_length=50)    # e.g. "18:00" or ISO string
     max_participants = models.PositiveIntegerField(default=1)
     required_skills = models.ManyToManyField(Skill, blank=True, related_name='shifts')
 
     def __str__(self):
-        return f"{self.task_area.name}: {self.title} ({self.start_time} - {self.end_time})"
+        date_str = f" ({self.date.strftime('%d.%m.%Y')})" if self.date else ""
+        return f"{self.task_area.name}: {self.title}{date_str} ({self.start_time} - {self.end_time})"
 
 class ShiftSignup(models.Model):
     shift = models.ForeignKey(Shift, on_delete=models.CASCADE, related_name='signups')

backend/apps/events/serializers.py

@@ -39,7 +39,7 @@ class ShiftSerializer(serializers.ModelSerializer):
     class Meta:
         model = Shift
         fields = [
-            'id', 'task_area', 'title', 'start_time', 'end_time',
+            'id', 'task_area', 'title', 'date', 'start_time', 'end_time',
             'max_participants', 'required_skills', 'required_skill_ids',
             'signups', 'signups_count', 'is_full'
         ]

backend/apps/events/views.py

@@ -369,6 +369,7 @@ class EventTemplateViewSet(viewsets.ModelViewSet):
                 shift = Shift.objects.create(
                     task_area=ta,
                     title=shift_data.get('title', 'Schicht'),
+                    date=shift_data.get('date') or start_date,
                     start_time=shift_data.get('start_time', '18:00'),
                     end_time=shift_data.get('end_time', '22:00'),
                     max_participants=shift_data.get('max_participants', 1)