chore: align .env.example with .env structure

- Add same section headers and organization
- Add admin initialization settings
- Add platform limits section
- Add seed data configuration section
- Add Stripe billing with docs reference
- Update project name and version

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

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

.env.example

@@ -1,60 +1,114 @@
-# .env.example
+# =============================================================================
+# ENVIRONMENT CONFIGURATION
+# =============================================================================
+DEBUG=False
 
-# Project information
-PROJECT_NAME=Ecommerce Backend API with Marketplace Support
-DESCRIPTION=Advanced product management system with JWT authentication
-VERSION=0.0.1
+# =============================================================================
+# PROJECT INFORMATION
+# =============================================================================
+PROJECT_NAME=Wizamart - Multi-Vendor Marketplace Platform
+DESCRIPTION=Multi-tenants multi-themes ecommerce application
+VERSION=2.2.0
 
-# Database Configuration
-# DATABASE_URL=postgresql://username:password@localhost:5432/wizamart_db
-# For development, you can use SQLite:
+# =============================================================================
+# DATABASE CONFIGURATION
+# =============================================================================
+# For development (SQLite)
 DATABASE_URL=sqlite:///./wizamart.db
 
-# Documentation
-# .env.development
-DOCUMENTATION_URL=http://localhost:8001
-# .env.production
-# DOCUMENTATION_URL=https://yourdomain.com/docs
-# .env.staging
-# DOCUMENTATION_URL=https://staging-docs.yourdomain.com
+# For production (PostgreSQL)
+# DATABASE_URL=postgresql://username:password@localhost:5432/wizamart_db
 
-# JWT Configuration
+# =============================================================================
+# ADMIN INITIALIZATION
+# =============================================================================
+# These are used by init_production.py to create the platform admin
+# ⚠️  CHANGE THESE IN PRODUCTION!
+ADMIN_EMAIL=admin@wizamart.com
+ADMIN_USERNAME=admin
+ADMIN_PASSWORD=change-me-in-production
+ADMIN_FIRST_NAME=Platform
+ADMIN_LAST_NAME=Administrator
+
+# =============================================================================
+# JWT CONFIGURATION
+# =============================================================================
 JWT_SECRET_KEY=your-super-secret-jwt-key-change-in-production
 JWT_EXPIRE_HOURS=24
 JWT_EXPIRE_MINUTES=30
 
-# API Configuration
+# =============================================================================
+# API SERVER
+# =============================================================================
 API_HOST=0.0.0.0
 API_PORT=8000
-DEBUG=False
 
-# Rate Limiting
+# =============================================================================
+# DOCUMENTATION
+# =============================================================================
+# Development
+DOCUMENTATION_URL=http://localhost:8001
+# Staging
+# DOCUMENTATION_URL=https://staging-docs.wizamart.com
+# Production
+# DOCUMENTATION_URL=https://docs.wizamart.com
+
+# =============================================================================
+# RATE LIMITING
+# =============================================================================
 RATE_LIMIT_ENABLED=True
 RATE_LIMIT_REQUESTS=100
 RATE_LIMIT_WINDOW=3600
 
-# Logging
+# =============================================================================
+# LOGGING
+# =============================================================================
 LOG_LEVEL=INFO
-LOG_FILE=log/app.log
+LOG_FILE=logs/app.log
 
-# Platform domain configuration
-PLATFORM_DOMAIN=platform.com  # Your main platform domain
+# =============================================================================
+# PLATFORM DOMAIN CONFIGURATION
+# =============================================================================
+# Your main platform domain
+PLATFORM_DOMAIN=wizamart.com
 
 # Custom domain features
-ALLOW_CUSTOM_DOMAINS=True  # Enable/disable custom domains
-REQUIRE_DOMAIN_VERIFICATION=True  # Require DNS verification
+# Enable/disable custom domains
+ALLOW_CUSTOM_DOMAINS=True
+# Require DNS verification
+REQUIRE_DOMAIN_VERIFICATION=True
 
-# SSL/TLS configuration for custom domains
-SSL_PROVIDER=letsencrypt  # or "cloudflare", "manual"
-AUTO_PROVISION_SSL=False  # Set to True if using automated SSL
+# SSL/TLS configuration
+# "letsencrypt" or "cloudflare", "manual"
+SSL_PROVIDER=letsencrypt
+# Set to True if using automated SSL
+AUTO_PROVISION_SSL=False
 
 # DNS verification
 DNS_VERIFICATION_PREFIX=_wizamart-verify
 DNS_VERIFICATION_TTL=3600
 
-# Stripe Billing Configuration
+# =============================================================================
+# STRIPE BILLING
+# =============================================================================
 # Get your keys from https://dashboard.stripe.com/apikeys
+# See docs/features/subscription-billing.md for setup guide
 STRIPE_SECRET_KEY=sk_test_your_secret_key_here
 STRIPE_PUBLISHABLE_KEY=pk_test_your_publishable_key_here
 STRIPE_WEBHOOK_SECRET=whsec_your_webhook_secret_here
-STRIPE_TRIAL_DAYS=30
+STRIPE_TRIAL_DAYS=30
+
+# =============================================================================
+# PLATFORM LIMITS
+# =============================================================================
+MAX_VENDORS_PER_USER=5
+MAX_TEAM_MEMBERS_PER_VENDOR=50
+INVITATION_EXPIRY_DAYS=7
+
+# =============================================================================
+# DEMO/SEED DATA CONFIGURATION (Development only)
+# =============================================================================
+SEED_DEMO_VENDORS=3
+SEED_CUSTOMERS_PER_VENDOR=15
+SEED_PRODUCTS_PER_VENDOR=20
+SEED_ORDERS_PER_VENDOR=10