Initial commit: WrestleDesk full project

- Django backend with DRF (clubs, wrestlers, trainers, exercises, templates, trainings, homework, locations, leistungstest)
- Next.js 16 frontend with React, Shadcn UI, Tailwind
- JWT authentication
- Full CRUD for all entities
- Calendar view for trainings
- Homework management system
- Leistungstest tracking

backend/exercises/models.py

@@ -0,0 +1,43 @@
+from django.db import models
+from django.core.validators import FileExtensionValidator
+
+
+class Exercise(models.Model):
+    CATEGORY_CHOICES = [
+        ('warmup', 'Warm-up'),
+        ('kraft', 'Strength'),
+        ('technik', 'Technique'),
+        ('ausdauer', 'Endurance'),
+        ('spiele', 'Games'),
+        ('cool_down', 'Cool-down'),
+    ]
+
+    TYPE_CHOICES = [
+        ('reps', 'Repetitions'),
+        ('time', 'Time-based'),
+    ]
+
+    name = models.CharField(max_length=200)
+    category = models.CharField(max_length=20, choices=CATEGORY_CHOICES)
+    exercise_type = models.CharField(max_length=10, choices=TYPE_CHOICES, default='reps')
+    club = models.ForeignKey('clubs.Club', on_delete=models.CASCADE, related_name='exercises', null=True, blank=True)
+    description = models.TextField(blank=True)
+    default_value = models.CharField(max_length=50, blank=True, help_text='Default reps or seconds')
+    media = models.FileField(
+        upload_to='exercises/media/',
+        null=True, blank=True,
+        validators=[FileExtensionValidator(allowed_extensions=['jpg', 'jpeg', 'png', 'mp4', 'webp'])]
+    )
+    is_active = models.BooleanField(default=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        ordering = ['category', 'name']
+        indexes = [
+            models.Index(fields=['category']),
+            models.Index(fields=['club']),
+        ]
+
+    def __str__(self):
+        return f"{self.name} ({self.get_category_display()})"