Implement product variations, enhanced order workflow, mobile responsiveness, and product import system

## Product Variations System
- Add ProductVariation model with quantity-based pricing (1 for £10, 2 for £19, 3 for £25)
- Complete CRUD operations for product variations
- Enhanced ProductService to include variations in all queries
- Updated OrderItem to support ProductVariationId for variation-based orders
- Graceful error handling for duplicate quantity constraints
- Admin interface with variations management (Create/Edit/Delete)
- API endpoints for programmatic variation management

## Enhanced Order Workflow Management
- Redesigned OrderStatus enum with clear workflow states (Accept → Packing → Dispatched → Delivered)
- Added workflow tracking fields (AcceptedAt, PackingStartedAt, DispatchedAt, ExpectedDeliveryDate)
- User tracking for accountability (AcceptedByUser, PackedByUser, DispatchedByUser)
- Automatic delivery date calculation (dispatch date + working days, skips weekends)
- On Hold workflow for problem resolution with reason tracking
- Tab-based orders interface focused on workflow stages
- One-click workflow actions from list view

## Mobile-Responsive Design
- Responsive orders interface: tables on desktop, cards on mobile
- Touch-friendly buttons and spacing for mobile users
- Horizontal scrolling tabs with condensed labels on mobile
- Color-coded status borders for quick visual recognition
- Smart text switching based on screen size

## Product Import/Export System
- CSV import with product variations support
- Template download with examples
- Export existing products to CSV
- Detailed import results with success/error reporting
- Category name resolution (no need for GUIDs)
- Photo URLs import support

## Enhanced Dashboard
- Product variations count and metrics
- Stock alerts (low stock/out of stock warnings)
- Order workflow breakdown (pending, accepted, dispatched counts)
- Enhanced layout with more detailed information

## Technical Improvements
- Fixed form binding issues across all admin forms
- Removed external CDN dependencies for isolated deployment
- Bot Wizard form with auto-personality assignment
- Proper authentication scheme configuration (Cookie + JWT)
- Enhanced debug logging for troubleshooting

## Self-Contained Deployment
- All external CDN references replaced with local libraries
- Ready for air-gapped/isolated network deployment
- No external internet dependencies

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

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

nginx.conf

@@ -0,0 +1,77 @@
+events {
+    worker_connections 1024;
+}
+
+http {
+    upstream littleshop {
+        server littleshop:5000;
+    }
+
+    # Rate limiting
+    limit_req_zone $binary_remote_addr zone=littleshop_limit:10m rate=10r/s;
+
+    server {
+        listen 80;
+        server_name shop.thebankofdebbie.giize.com;
+
+        # Redirect HTTP to HTTPS
+        return 301 https://$server_name$request_uri;
+    }
+
+    server {
+        listen 443 ssl http2;
+        server_name shop.thebankofdebbie.giize.com;
+
+        # SSL Configuration (if you have certificates)
+        # ssl_certificate /etc/nginx/ssl/cert.pem;
+        # ssl_certificate_key /etc/nginx/ssl/key.pem;
+
+        # For development/testing without SSL, comment out ssl lines above
+        # and change listen to: listen 443;
+
+        # Security headers
+        add_header X-Frame-Options DENY;
+        add_header X-Content-Type-Options nosniff;
+        add_header X-XSS-Protection "1; mode=block";
+        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
+
+        # Rate limiting
+        limit_req zone=littleshop_limit burst=20 nodelay;
+
+        # Client max body size (for file uploads)
+        client_max_body_size 50M;
+
+        location / {
+            proxy_pass http://littleshop;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+            proxy_set_header X-Forwarded-Host $host;
+
+            # Timeout settings
+            proxy_connect_timeout 60s;
+            proxy_send_timeout 60s;
+            proxy_read_timeout 60s;
+
+            # Buffer settings
+            proxy_buffering on;
+            proxy_buffer_size 4k;
+            proxy_buffers 8 4k;
+            proxy_busy_buffers_size 8k;
+        }
+
+        # Static files (optional optimization)
+        location /wwwroot/ {
+            proxy_pass http://littleshop;
+            expires 1d;
+            add_header Cache-Control "public, immutable";
+        }
+
+        # Health check endpoint
+        location /api/test {
+            proxy_pass http://littleshop;
+            access_log off;
+        }
+    }
+}