docs: restructure website, optimize HTML, gitignore private files

Website docs (website/docs/):
- Delete 6 stale -md.html duplicates
- Rename docs-clients/miners/developers → clients/miners/developers.html
- Unify header/nav across all 15 pages (new .site-header pattern)
- Fix 34 dead href=# links with real targets
- Upgrade Font Awesome v4→v6 in index.html
- Replace search stub with live client-side search (15-page index)
- Extract all inline CSS into shared docs.css (+630 lines)
- Extract inline theme JS into shared theme.js
- Strip inline style= attributes from 10+ pages
- Add .announce-banner, .source-links, .search-results CSS classes
- Add Markdown Source links to clients/miners/developers pages
- Update components.html title to Architecture & Components
- Move browser-wallet.html to website/wallet/, leave redirect
- Update all dates to February 2026

Website root:
- Delete 6 root-level duplicate HTML files (160KB saved)
- Rewire index.html and 404.html links

Root README.md:
- Fix 8 broken doc links to new numbered folder structure
- Update copyright to 2026

.gitignore + .example files:
- Gitignore private files: .aitbc.yaml, .env, deploy scripts,
  GPU scripts, service scripts, infra configs, .windsurf/, website README
- Create 7 .example files for GitHub users with sanitized templates
- Untrack 47 previously committed private files

Live server:
- Push all website files to aitbc-cascade:/var/www/html/
- Clean stale admin.html and index.nginx-debian.html

scripts/deploy/deploy-domain.sh

@@ -1,88 +0,0 @@
-#!/bin/bash
-
-# Deploy AITBC services to domain https://aitbc.bubuit.net
-
-set -e
-
-DOMAIN="aitbc.bubuit.net"
-CONTAINER="aitbc"
-
-echo "🚀 Deploying AITBC services to https://$DOMAIN"
-echo ""
-
-# Colors
-GREEN='\033[0;32m'
-YELLOW='\033[1;33m'
-NC='\033[0m'
-
-print_status() {
-    echo -e "${GREEN}[INFO]${NC} $1"
-}
-
-print_warning() {
-    echo -e "${YELLOW}[WARN]${NC} $1"
-}
-
-# Stop local services
-print_status "Stopping local services..."
-sudo fuser -k 8000/tcp 2>/dev/null || true
-sudo fuser -k 9080/tcp 2>/dev/null || true
-sudo fuser -k 3001/tcp 2>/dev/null || true
-sudo fuser -k 3002/tcp 2>/dev/null || true
-
-# Deploy to container
-print_status "Deploying to container..."
-python /home/oib/windsurf/aitbc/container-deploy.py
-
-# Copy nginx config to container
-print_status "Configuring nginx for domain..."
-incus file push /home/oib/windsurf/aitbc/nginx-aitbc.conf $CONTAINER/etc/nginx/sites-available/aitbc
-
-# Enable site
-incus exec $CONTAINER -- ln -sf /etc/nginx/sites-available/aitbc /etc/nginx/sites-enabled/
-incus exec $CONTAINER -- rm -f /etc/nginx/sites-enabled/default
-
-# Test nginx config
-incus exec $CONTAINER -- nginx -t
-
-# Reload nginx
-incus exec $CONTAINER -- systemctl reload nginx
-
-# Install SSL certificate (Let's Encrypt)
-print_warning "SSL Certificate Setup:"
-echo "1. Ensure port 80/443 are forwarded to container IP (10.1.223.93)"
-echo "2. Run certbot in container:"
-echo "   incus exec $CONTAINER -- certbot --nginx -d $DOMAIN"
-echo ""
-
-# Update UIs to use correct API endpoints
-print_status "Updating API endpoints..."
-
-# Update marketplace API base URL
-incus exec $CONTAINER -- sed -i "s|http://127.0.0.1:8000|https://$DOMAIN/api|g" /home/oib/aitbc/apps/marketplace-ui/index.html
-
-# Update exchange API endpoints
-incus exec $CONTAINER -- sed -i "s|http://127.0.0.1:8000|https://$DOMAIN/api|g" /home/oib/aitbc/apps/trade-exchange/index.html
-incus exec $CONTAINER -- sed -i "s|http://127.0.0.1:9080|https://$DOMAIN/rpc|g" /home/oib/aitbc/apps/trade-exchange/index.html
-
-# Restart services to apply changes
-print_status "Restarting services..."
-incus exec $CONTAINER -- pkill -f "server.py"
-sleep 2
-incus exec $CONTAINER -- /home/oib/start_aitbc.sh
-
-echo ""
-print_status "✅ Deployment complete!"
-echo ""
-echo "📋 Service URLs:"
-echo "  🌐 Domain: https://$DOMAIN"
-echo "  📊 Marketplace: https://$DOMAIN/Marketplace"
-echo "  💱 Trade Exchange: https://$DOMAIN/Exchange"
-echo "  🔗 API: https://$DOMAIN/api"
-echo "  ⛓️  Blockchain RPC: https://$DOMAIN/rpc"
-echo ""
-echo "📝 Next Steps:"
-echo "1. Forward ports 80/443 to container IP (10.1.223.93)"
-echo "2. Install SSL certificate:"
-echo "   incus exec $CONTAINER -- certbot --nginx -d $DOMAIN"
-echo "3. Test services at the URLs above"