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>

werkout_api/settings.py

@@ -34,6 +34,8 @@ INSTALLED_APPS = [
     'import_export',
     'push_notifications',
 
+    'corsheaders',
+
     'equipment',
     'exercise',
     'registered_user',
@@ -42,11 +44,13 @@ INSTALLED_APPS = [
     'scripts',
     'video',
     'superset',
+    'generator',
 ]
 
 MIDDLEWARE = [
     'django.middleware.security.SecurityMiddleware',
     "whitenoise.middleware.WhiteNoiseMiddleware",
+    'corsheaders.middleware.CorsMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.common.CommonMiddleware',
     'debug_toolbar.middleware.DebugToolbarMiddleware',
@@ -198,6 +202,12 @@ else:
         }
     }
 
+    CACHES = {
+        "default": {
+            "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
+        }
+    }
+
     CELERY_BROKER_URL = "redis://redis:6379"
     CELERY_RESULT_BACKEND = "redis://redis:6379"
 
@@ -210,4 +220,12 @@ else:
     #         "APNS_TOPIC": "io.brodkast.ios-Dev",
     #         "APNS_TEAM_ID": "JCU65VV9D9",
     #         "APNS_USE_SANDBOX": True
-    # }
+    # }
+
+# CORS settings
+CORS_ALLOW_ALL_ORIGINS = True if DEBUG else False
+CORS_ALLOWED_ORIGINS = [
+    'http://localhost:3000',
+    'http://127.0.0.1:3000',
+]
+CORS_ALLOW_CREDENTIALS = True