workout generator audit: rules engine, structure rules, split patterns, injury UX, metadata cleanup

- Add rules_engine.py with quantitative rules for all 8 workout types
- Add quality gate retry loop in generate_single_workout()
- Expand calibrate_structure_rules to all 120 combinations (8 types × 5 goals × 3 sections)
- Wire WeeklySplitPattern DB records into _pick_weekly_split()
- Enforce movement patterns from WorkoutStructureRule in exercise selection
- Add straight-set strength support (single main lift, 4-6 rounds)
- Add modality consistency check for duration-dominant workout types
- Add InjuryStep component to onboarding and preferences
- Add sibling exercise exclusion in regenerate and preview_day endpoints
- Display generator warnings on dashboard
- Expand fix_rep_durations, fix_exercise_flags, fix_movement_pattern_typo
- Add audit_exercise_data and check_rules_drift management commands
- Add Next.js frontend with dashboard, onboarding, preferences, history pages
- Add generator app with ML-powered workout generation pipeline
- 96 new tests across 7 test modules

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

equipment/migrations/0003_alter_workoutequipment_unique_together.py

@@ -0,0 +1,34 @@
+# Generated by Django 5.1.4 on 2026-02-21 05:06
+
+from django.db import migrations
+
+
+def deduplicate_workout_equipment(apps, schema_editor):
+    """Remove duplicate WorkoutEquipment rows before adding unique constraint."""
+    WorkoutEquipment = apps.get_model('equipment', 'WorkoutEquipment')
+    seen = set()
+    to_delete = []
+    for we in WorkoutEquipment.objects.all().order_by('id'):
+        key = (we.exercise_id, we.equipment_id)
+        if key in seen:
+            to_delete.append(we.id)
+        else:
+            seen.add(key)
+    if to_delete:
+        WorkoutEquipment.objects.filter(id__in=to_delete).delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('equipment', '0002_workoutequipment'),
+        ('exercise', '0010_alter_exercise_complexity_rating_and_more'),
+    ]
+
+    operations = [
+        migrations.RunPython(deduplicate_workout_equipment, migrations.RunPython.noop),
+        migrations.AlterUniqueTogether(
+            name='workoutequipment',
+            unique_together={('exercise', 'equipment')},
+        ),
+    ]

equipment/models.py

@@ -26,5 +26,8 @@ class WorkoutEquipment(models.Model):
         related_name='workout_exercise_workout'
     )
 
+    class Meta:
+        unique_together = ('exercise', 'equipment')
+
     def __str__(self):
         return self.exercise.name + " : " + self.equipment.name