feat: add vendor content page overrides to demo seed

- Add VENDOR_CONTENT_PAGES config with custom About, Contact, FAQ pages
- WizaMart: custom About and Contact pages
- Fashion Hub: custom About page
- Book Store: custom About and FAQ pages
- Create create_demo_vendor_content_pages() function
- Add ContentPage to reset cleanup (vendor pages only)
- Show content page counts in seeding summary

Demonstrates the CMS vendor override feature where vendors can
customize platform default pages with their own branding.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/seed_demo.py

@@ -53,6 +53,7 @@ from app.core.environment import get_environment, is_production
 from middleware.auth import AuthManager
 from models.database.admin import PlatformAlert
 from models.database.company import Company
+from models.database.content_page import ContentPage
 from models.database.customer import Customer, CustomerAddress
 from models.database.marketplace_import_job import MarketplaceImportJob
 from models.database.marketplace_product import MarketplaceProduct
@@ -172,6 +173,171 @@ THEME_PRESETS = {
     },
 }
 
+# Vendor content page overrides (demonstrates CMS vendor override feature)
+# Each vendor can override platform default pages with custom content
+VENDOR_CONTENT_PAGES = {
+    "WIZAMART": [
+        {
+            "slug": "about",
+            "title": "About WizaMart",
+            "content": """
+<div class="prose-content">
+    <h2>Welcome to WizaMart</h2>
+    <p>Your premier destination for cutting-edge electronics and innovative gadgets.</p>
+
+    <h3>Our Story</h3>
+    <p>Founded by tech enthusiasts, WizaMart has been bringing the latest technology to customers since 2020.
+    We carefully curate our selection to ensure you get only the best products at competitive prices.</p>
+
+    <h3>Why Choose WizaMart?</h3>
+    <ul>
+        <li><strong>Expert Selection:</strong> Our team tests and reviews every product</li>
+        <li><strong>Best Prices:</strong> We negotiate directly with manufacturers</li>
+        <li><strong>Fast Shipping:</strong> Same-day dispatch on orders before 2pm</li>
+        <li><strong>Tech Support:</strong> Free lifetime technical assistance</li>
+    </ul>
+
+    <h3>Visit Our Showroom</h3>
+    <p>123 Tech Street, Luxembourg City<br>Open Monday-Saturday, 9am-7pm</p>
+</div>
+            """,
+            "meta_description": "WizaMart - Your trusted source for premium electronics and gadgets in Luxembourg",
+            "show_in_header": True,
+            "show_in_footer": True,
+        },
+        {
+            "slug": "contact",
+            "title": "Contact WizaMart",
+            "content": """
+<div class="prose-content">
+    <h2>Get in Touch with WizaMart</h2>
+
+    <h3>Customer Support</h3>
+    <ul>
+        <li><strong>Email:</strong> support@wizamart.shop</li>
+        <li><strong>Phone:</strong> +352 123 456 789</li>
+        <li><strong>WhatsApp:</strong> +352 123 456 789</li>
+        <li><strong>Hours:</strong> Monday-Friday, 9am-6pm CET</li>
+    </ul>
+
+    <h3>Technical Support</h3>
+    <p>Need help with your gadgets? Our tech experts are here to help!</p>
+    <ul>
+        <li><strong>Email:</strong> tech@wizamart.shop</li>
+        <li><strong>Live Chat:</strong> Available on our website</li>
+    </ul>
+
+    <h3>Store Location</h3>
+    <p>123 Tech Street<br>Luxembourg City, L-1234<br>Luxembourg</p>
+</div>
+            """,
+            "meta_description": "Contact WizaMart customer support for electronics and gadget inquiries",
+            "show_in_header": True,
+            "show_in_footer": True,
+        },
+    ],
+    "FASHIONHUB": [
+        {
+            "slug": "about",
+            "title": "About Fashion Hub",
+            "content": """
+<div class="prose-content">
+    <h2>Welcome to Fashion Hub</h2>
+    <p>Where style meets affordability. Discover the latest trends in fashion and accessories.</p>
+
+    <h3>Our Philosophy</h3>
+    <p>At Fashion Hub, we believe everyone deserves to look and feel their best.
+    We curate collections from emerging designers and established brands to bring you
+    fashion-forward pieces at accessible prices.</p>
+
+    <h3>What Makes Us Different</h3>
+    <ul>
+        <li><strong>Trend-Forward:</strong> New arrivals weekly from global fashion capitals</li>
+        <li><strong>Sustainable:</strong> 40% of our collection uses eco-friendly materials</li>
+        <li><strong>Inclusive:</strong> Sizes XS to 4XL available</li>
+        <li><strong>Personal Styling:</strong> Free virtual styling consultations</li>
+    </ul>
+
+    <h3>Join Our Community</h3>
+    <p>Follow us on Instagram @FashionHubLux for styling tips and exclusive offers!</p>
+</div>
+            """,
+            "meta_description": "Fashion Hub - Trendy clothing and accessories for the style-conscious shopper",
+            "show_in_header": True,
+            "show_in_footer": True,
+        },
+    ],
+    "BOOKSTORE": [
+        {
+            "slug": "about",
+            "title": "About The Book Store",
+            "content": """
+<div class="prose-content">
+    <h2>Welcome to The Book Store</h2>
+    <p>Your literary haven in Luxembourg. From bestsellers to rare finds, we have something for every reader.</p>
+
+    <h3>Our Heritage</h3>
+    <p>Established by book lovers for book lovers, The Book Store has been serving
+    the Luxembourg community for over a decade. We pride ourselves on our carefully
+    curated selection and knowledgeable staff.</p>
+
+    <h3>What We Offer</h3>
+    <ul>
+        <li><strong>Vast Selection:</strong> Over 50,000 titles across all genres</li>
+        <li><strong>Special Orders:</strong> Can't find what you're looking for? We'll get it for you</li>
+        <li><strong>Book Club:</strong> Monthly meetings and 15% member discount</li>
+        <li><strong>Author Events:</strong> Regular readings and book signings</li>
+        <li><strong>Children's Corner:</strong> Dedicated space for young readers</li>
+    </ul>
+
+    <h3>Visit Us</h3>
+    <p>789 Library Lane, Esch-sur-Alzette<br>
+    Open daily 10am-8pm, Sundays 12pm-6pm</p>
+</div>
+            """,
+            "meta_description": "The Book Store - Your independent bookshop in Luxembourg with a passion for literature",
+            "show_in_header": True,
+            "show_in_footer": True,
+        },
+        {
+            "slug": "faq",
+            "title": "Book Store FAQ",
+            "content": """
+<div class="prose-content">
+    <h2>Frequently Asked Questions</h2>
+
+    <h3>Orders & Delivery</h3>
+
+    <h4>Do you ship internationally?</h4>
+    <p>Yes! We ship to all EU countries. Non-EU shipping available on request.</p>
+
+    <h4>How long does delivery take?</h4>
+    <p>Luxembourg: 1-2 business days. EU: 3-7 business days.</p>
+
+    <h4>Can I order books that aren't in stock?</h4>
+    <p>Absolutely! We can order any book in print. Special orders usually arrive within 1-2 weeks.</p>
+
+    <h3>Book Club</h3>
+
+    <h4>How do I join the book club?</h4>
+    <p>Sign up at our store or email bookclub@bookstore.lu. Annual membership is €25.</p>
+
+    <h4>What are the benefits?</h4>
+    <p>15% discount on all purchases, early access to author events, and monthly reading recommendations.</p>
+
+    <h3>Gift Cards</h3>
+
+    <h4>Do you sell gift cards?</h4>
+    <p>Yes! Available in €10, €25, €50, and €100 denominations, or custom amounts.</p>
+</div>
+            """,
+            "meta_description": "Frequently asked questions about The Book Store - orders, delivery, and book club",
+            "show_in_header": False,
+            "show_in_footer": True,
+        },
+    ],
+}
+
 
 # =============================================================================
 # HELPER FUNCTIONS
@@ -278,6 +444,7 @@ def reset_all_data(db: Session):
         MarketplaceImportJob,
         MarketplaceProduct,
         Product,
+        ContentPage,  # Delete vendor content pages (keep platform defaults)
         VendorDomain,
         VendorTheme,
         Role,
@@ -288,7 +455,11 @@ def reset_all_data(db: Session):
     ]
 
     for table in tables_to_clear:
-        db.execute(delete(table))
+        if table == ContentPage:
+            # Only delete vendor content pages, keep platform defaults
+            db.execute(delete(ContentPage).where(ContentPage.vendor_id != None))
+        else:
+            db.execute(delete(table))
 
     # Delete non-admin users
     db.execute(delete(User).where(User.role != "admin"))
@@ -620,6 +791,62 @@ def create_demo_products(db: Session, vendor: Vendor, count: int) -> list[Produc
     return products
 
 
+def create_demo_vendor_content_pages(db: Session, vendors: list[Vendor]) -> int:
+    """Create vendor-specific content page overrides.
+
+    These demonstrate the CMS vendor override feature where vendors can
+    customize platform default pages with their own branding and content.
+    """
+    created_count = 0
+
+    for vendor in vendors:
+        vendor_pages = VENDOR_CONTENT_PAGES.get(vendor.vendor_code, [])
+
+        if not vendor_pages:
+            continue
+
+        for page_data in vendor_pages:
+            # Check if this vendor page already exists
+            existing = db.execute(
+                select(ContentPage).where(
+                    ContentPage.vendor_id == vendor.id,
+                    ContentPage.slug == page_data["slug"],
+                )
+            ).scalar_one_or_none()
+
+            if existing:
+                continue  # Skip, already exists
+
+            # Create vendor content page override
+            page = ContentPage(
+                vendor_id=vendor.id,
+                slug=page_data["slug"],
+                title=page_data["title"],
+                content=page_data["content"].strip(),
+                content_format="html",
+                meta_description=page_data.get("meta_description"),
+                is_published=True,
+                published_at=datetime.now(UTC),
+                show_in_header=page_data.get("show_in_header", False),
+                show_in_footer=page_data.get("show_in_footer", True),
+                show_in_legal=page_data.get("show_in_legal", False),
+                display_order=page_data.get("display_order", 0),
+                created_at=datetime.now(UTC),
+                updated_at=datetime.now(UTC),
+            )
+            db.add(page)
+            created_count += 1
+
+    db.flush()
+
+    if created_count > 0:
+        print_success(f"Created {created_count} vendor content page overrides")
+    else:
+        print_warning("Vendor content pages already exist")
+
+    return created_count
+
+
 # =============================================================================
 # MAIN SEEDING
 # =============================================================================
@@ -665,6 +892,10 @@ def seed_demo_data(db: Session, auth_manager: AuthManager):
     for vendor in vendors:
         create_demo_products(db, vendor, count=settings.seed_products_per_vendor)
 
+    # Step 8: Create vendor content pages
+    print_step(8, "Creating vendor content page overrides...")
+    create_demo_vendor_content_pages(db, vendors)
+
     # Commit all changes
     db.commit()
     print_success("All demo data committed")
@@ -681,13 +912,16 @@ def print_summary(db: Session):
     user_count = db.query(User).count()
     customer_count = db.query(Customer).count()
     product_count = db.query(Product).count()
+    platform_pages = db.query(ContentPage).filter(ContentPage.vendor_id == None).count()
+    vendor_pages = db.query(ContentPage).filter(ContentPage.vendor_id != None).count()
 
     print("\n📊 Database Status:")
-    print(f"  Companies:   {company_count}")
-    print(f"  Vendors:     {vendor_count}")
-    print(f"  Users:       {user_count}")
-    print(f"  Customers:   {customer_count}")
-    print(f"  Products:    {product_count}")
+    print(f"  Companies:      {company_count}")
+    print(f"  Vendors:        {vendor_count}")
+    print(f"  Users:          {user_count}")
+    print(f"  Customers:      {customer_count}")
+    print(f"  Products:       {product_count}")
+    print(f"  Content Pages:  {platform_pages} platform + {vendor_pages} vendor overrides")
 
     # Show company details
     companies = db.query(Company).all()