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>

LittleShop/cookies.txt

@@ -2,4 +2,4 @@
 # https://curl.se/docs/http-cookies.html
 # This file was generated by libcurl! Edit at your own risk.
 
-#HttpOnly_localhost	FALSE	/	FALSE	0	.AspNetCore.Cookies	CfDJ8DxJ63S0c9FElmGFRyriOyxQ2VI2WE5MN0TByz7kNSHwr3VBa5sqlpt_YLV50eF1Yb04QBtu5uPrfXC_UzF1eF81n6XNYBeETJ9wfUrJwVFWThtFhEfOEzcYTtrr7ZB-yIMaV6A6QeOcIDnuiwquaWzkyno94PNydw2-lLD4jlBamWa32DiYNwI17zYglyaSEgS1ITdN4BQpfGSUAH2Mma6aw4MWZKK3xIj6Q8ps-x42Q-XWXgiKQhHvoSg09GpfFKoHBRIMWfxF5-6CkgVOGo7gGeXFhIEKrS6UcvyxfeQ2J79pR02IUfWgvGAStD5V2CBqoRphOnZMRj_Sgwhkon1JV-BRAkzmoG8UhGJe7l-xNnK8soPjER70h1ajZ-FNS-Zu7n5yupuCV50aRpvf1aroKryotLv9cDWgMVTlRzClrGqBwp2oTK6a1o9pkfHfQg
+#HttpOnly_localhost	FALSE	/	FALSE	0	.AspNetCore.Cookies	CfDJ8EuTJxpD_M1FlZqQ5anN7O_HRIgSBb-xpi5fb6C7RkkUGXYZDnXJwrE8SzrYPVZMVePsro-9t2mZBzv2P4QylUMwt6Ovpd0kgxEatefnx3k64cqRSQMTsxU6X5P_1JjNccDpPwqsmxX_l_aBH_PvmnAjxMCeTEaZ1frmRWHLdOkKFrCWQbgDrso1ZelLuvewDn-5Yr9neq4Dp4dwczSs8EXtdcs_XArBHaDeIylzyjHbHBNdIiZeN2JeEcvcwabixeXefhaGVrq26pvG7YHWvpkjC1Np_IW76YSM3xe_RN5E5wOODfscPLWfPeOahZFlgxH6oWmr9NVfBEVa9CQc2msO1cSrtEypeygtZyoJZIqePPWVfFunMTzjKflheQAdDYRBKJP4moZ2eVvirkC6BZ-fq33FgVcKM7AwmX3RBWPHQhJSYq7bJsw4zS-r6vu93RAgTWxzFzSznt6hp8KeRzRjahIOzs6gO6g_7ihtfogphbt-joCNQeFKqCTSFkhudxMT2pG_n7QJHrO_ECriqms3lrrMq2wDddjcMySg02Uw