feat: Add customer management, payments, and push notifications with security enhancements

Major Feature Additions:
- Customer management: Full CRUD with data export and privacy compliance
- Payment management: Centralized payment tracking and administration
- Push notification subscriptions: Manage and track web push subscriptions

Security Enhancements:
- IP whitelist middleware for administrative endpoints
- Data retention service with configurable policies
- Enhanced push notification security documentation
- Security fixes progress tracking (2025-11-14)

UI/UX Improvements:
- Enhanced navigation with improved mobile responsiveness
- Updated admin dashboard with order status counts
- Improved product CRUD forms
- New customer and payment management interfaces

Backend Improvements:
- Extended customer service with data export capabilities
- Enhanced order service with status count queries
- Improved crypto payment service with better error handling
- Updated validators and configuration

Documentation:
- DEPLOYMENT_NGINX_GUIDE.md: Nginx deployment instructions
- IP_STORAGE_ANALYSIS.md: IP storage security analysis
- PUSH_NOTIFICATION_SECURITY.md: Push notification security guide
- UI_UX_IMPROVEMENT_PLAN.md: Planned UI/UX enhancements
- UI_UX_IMPROVEMENTS_COMPLETED.md: Completed improvements

Cleanup:
- Removed temporary database WAL files
- Removed stale commit message file

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

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

LittleShop/DTOs/OrderStatusCountsDto.cs

@@ -0,0 +1,16 @@
+namespace LittleShop.DTOs;
+
+/// <summary>
+/// DTO containing counts for each order status/workflow state.
+/// Used for displaying badge counts in the Orders Index view.
+/// </summary>
+public class OrderStatusCountsDto
+{
+    public int PendingPaymentCount { get; set; }
+    public int RequiringActionCount { get; set; }  // PaymentReceived orders needing acceptance
+    public int ForPackingCount { get; set; }       // Accepted orders ready for packing
+    public int DispatchedCount { get; set; }
+    public int OnHoldCount { get; set; }
+    public int DeliveredCount { get; set; }
+    public int CancelledCount { get; set; }
+}