docs: add comprehensive CMS documentation

Add complete documentation for the Content Management System:

Feature Documentation (docs/features/):
- content-management-system.md - Complete CMS overview
  * Two-tier architecture explanation
  * Database schema and relationships
  * API reference for all endpoints
  * Usage workflows for admin/vendor/customer
  * Best practices and examples

- cms-implementation-guide.md - Step-by-step implementation
  * Activation checklist
  * Code integration instructions
  * Testing procedures
  * Troubleshooting guide

Quick Start Guide (docs/getting-started/):
- cms-quick-start.md - Quick reference
  * Setup commands
  * Access URLs
  * Managing content (API, admin panel, vendor dashboard)
  * Two-tier system explained with examples
  * Common tasks and troubleshooting

Updated Seeder Docs:
- Add CMS to enhanced seeder coverage list
- Add dedicated CMS section with table of pages
- Document integration with db-setup workflow
- Update best practices

MkDocs Configuration:
- Add "Features" section with CMS documentation
- Add CMS Quick Start to "Getting Started"
- Add CDN Fallback Strategy to "Frontend Development"
- Complete navigation structure

All documentation builds cleanly with no warnings.

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

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

docs/development/database-seeder/DATABASE_SEEDER_DOCUMENTATION.md

@@ -22,6 +22,7 @@ I've created a comprehensive database seeder for your Wizamart platform that sig
 - ✓ Import jobs
 - ✓ Admin settings (platform configuration)
 - ✓ Platform alerts (system monitoring)
+- ✓ **CMS Content Pages** (platform defaults: about, contact, FAQ, shipping, returns, privacy, terms)
 
 ## Files Created
 
@@ -352,12 +353,64 @@ source venv/bin/activate  # Linux/Mac
 venv\Scripts\activate     # Windows
 ```
 
+## CMS Content Pages
+
+The platform includes a comprehensive CMS (Content Management System) for managing static content pages.
+
+### Creating Default CMS Pages
+
+To create platform-level default content pages (About, Contact, FAQ, Shipping, Returns, Privacy, Terms):
+
+```bash
+make create-cms-defaults
+# or
+python scripts/create_default_content_pages.py
+```
+
+This creates 7 platform default pages that all vendors inherit:
+
+| Slug | Title | Show in Footer | Show in Header |
+|------|-------|----------------|----------------|
+| about | About Us | ✓ | ✓ |
+| contact | Contact Us | ✓ | ✓ |
+| faq | Frequently Asked Questions | ✓ | ✗ |
+| shipping | Shipping Policy | ✓ | ✗ |
+| returns | Return & Refund Policy | ✓ | ✗ |
+| privacy | Privacy Policy | ✓ | ✗ |
+| terms | Terms of Service | ✓ | ✗ |
+
+**Features:**
+- **Platform Defaults**: Created with `vendor_id=NULL`, available to all vendors
+- **Vendor Overrides**: Vendors can create custom versions with the same slug
+- **Automatic Fallback**: System checks vendor override first, falls back to platform default
+- **Navigation**: Pages marked with `show_in_footer` appear in shop footer automatically
+- **Idempotent**: Script skips pages that already exist
+
+**Access URLs:**
+- `/about` - About Us page
+- `/contact` - Contact page
+- `/faq` - FAQ page
+- `/shipping` - Shipping Policy
+- `/returns` - Return Policy
+- `/privacy` - Privacy Policy
+- `/terms` - Terms of Service
+
+### Integration with db-setup
+
+The `make db-setup` command automatically includes CMS defaults:
+
+```bash
+make db-setup
+# Runs: migrate-up → init-prod → create-cms-defaults → seed-demo
+```
+
 ## Best Practices
 
 1. **Development**: Use `make seed` for full test data
 2. **Quick Testing**: Use `make seed-minimal` for fast setup
 3. **Fresh Start**: Use `make seed-reset` when testing migrations
-4. **Production**: Never run the seeder in production!
+4. **CMS Pages**: Run `make create-cms-defaults` after migrations
+5. **Production**: Never run the seeder in production!
 
 ## Security Notes