fix: sync user↔company in user_companies + fix calendar field names

- Migration 065: backfill user_companies from legacy User.company_id
- Auth register: create UserCompany record on registration
- Admin assign company: sync user_companies when assigning via admin panel
- Fix NordaEvent field names: start_time→time_start, end_time→time_end,
  max_participants→max_attendees, remove non-existent fields

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

blueprints/admin/routes.py

@@ -24,7 +24,7 @@ from . import bp
 from database import (
     SessionLocal, User, Company, CompanyRecommendation,
     MembershipFee, MembershipFeeConfig, NordaEvent, EventAttendee,
-    SystemRole
+    SystemRole, UserCompany
 )
 from utils.decorators import role_required
 from utils.helpers import sanitize_html
@@ -390,9 +390,21 @@ def admin_user_assign_company(user_id):
                 return jsonify({'success': False, 'error': 'Firma nie znaleziona'}), 404
             user.company_id = company_id
             company_name = company.name
+
+            # Sync user_companies table
+            existing_uc = db.query(UserCompany).filter_by(user_id=user.id, company_id=company_id).first()
+            if not existing_uc:
+                # Remove old primary associations
+                db.query(UserCompany).filter_by(user_id=user.id, is_primary=True).update({'is_primary': False})
+                uc = UserCompany(user_id=user.id, company_id=company_id, role='MANAGER', is_primary=True)
+                db.add(uc)
+            else:
+                existing_uc.is_primary = True
         else:
             user.company_id = None
             company_name = None
+            # Remove primary flag from all user_companies
+            db.query(UserCompany).filter_by(user_id=user.id, is_primary=True).update({'is_primary': False})
 
         db.commit()
 
@@ -903,15 +915,14 @@ def admin_calendar_new():
                 title=request.form.get('title', '').strip(),
                 description=sanitize_html(request.form.get('description', '').strip()),
                 event_date=datetime.strptime(request.form.get('event_date'), '%Y-%m-%d').date(),
-                start_time=request.form.get('start_time') or None,
-                end_time=request.form.get('end_time') or None,
+                time_start=request.form.get('time_start') or None,
+                time_end=request.form.get('time_end') or None,
                 location=request.form.get('location', '').strip() or None,
                 event_type=event_type,
-                max_participants=request.form.get('max_participants', type=int) or None,
-                registration_required=request.form.get('registration_required') == 'on',
-                is_public=request.form.get('is_public') == 'on',
+                max_attendees=request.form.get('max_attendees', type=int) or None,
                 access_level=access_level,
-                created_by=current_user.id
+                created_by=current_user.id,
+                source='manual'
             )
 
             db.add(event)

blueprints/auth/routes.py

@@ -16,7 +16,7 @@ from flask_login import login_required, login_user, logout_user, current_user
 from werkzeug.security import generate_password_hash, check_password_hash
 
 from . import bp
-from database import SessionLocal, User, Company, UserBlock
+from database import SessionLocal, User, Company, UserBlock, UserCompany
 from utils.helpers import sanitize_input, validate_email, validate_password
 from extensions import limiter
 from security_service import log_audit
@@ -155,6 +155,13 @@ def register():
             )
 
             db.add(user)
+            db.flush()  # Get user.id before creating UserCompany
+
+            # Create user_companies record if company matched
+            if company_id:
+                uc = UserCompany(user_id=user.id, company_id=company_id, role='MANAGER', is_primary=True)
+                db.add(uc)
+
             db.commit()
 
             # Build verification URL

database/migrations/065_sync_user_companies.sql

@@ -0,0 +1,11 @@
+-- Migration 065: Sync legacy User.company_id to user_companies table
+-- For all users with company_id set but missing user_companies record
+
+INSERT INTO user_companies (user_id, company_id, role, is_primary, created_at, updated_at)
+SELECT u.id, u.company_id, 'MANAGER', true, NOW(), NOW()
+FROM users u
+WHERE u.company_id IS NOT NULL
+  AND NOT EXISTS (
+    SELECT 1 FROM user_companies uc
+    WHERE uc.user_id = u.id AND uc.company_id = u.company_id
+  );