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/Services/OrderService.cs

@@ -607,6 +607,27 @@ public class OrderService : IOrderService
         return await GetOrdersByStatusAsync(OrderStatus.OnHold);
     }
 
+    public async Task<OrderStatusCountsDto> GetOrderStatusCountsAsync()
+    {
+        // Single efficient query to get all status counts
+        var orders = await _context.Orders
+            .Select(o => new { o.Status })
+            .ToListAsync();
+
+        var statusCounts = new OrderStatusCountsDto
+        {
+            PendingPaymentCount = orders.Count(o => o.Status == OrderStatus.PendingPayment),
+            RequiringActionCount = orders.Count(o => o.Status == OrderStatus.PaymentReceived),
+            ForPackingCount = orders.Count(o => o.Status == OrderStatus.Accepted),
+            DispatchedCount = orders.Count(o => o.Status == OrderStatus.Dispatched),
+            OnHoldCount = orders.Count(o => o.Status == OrderStatus.OnHold),
+            DeliveredCount = orders.Count(o => o.Status == OrderStatus.Delivered),
+            CancelledCount = orders.Count(o => o.Status == OrderStatus.Cancelled)
+        };
+
+        return statusCounts;
+    }
+
     private async Task SendNewOrderNotification(Order order)
     {
         try