Fix admin route access and backend configuration

- Added /admin redirect to login page in nginx config
- Fixed backend server.js route ordering for proper admin handling
- Updated authentication middleware and routes
- Added user management routes
- Configured PostgreSQL integration
- Updated environment configuration

Controllers/ShopController.cs

@@ -0,0 +1,72 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using SkyArtShop.Models;
+using SkyArtShop.Services;
+
+namespace SkyArtShop.Controllers;
+
+public class ShopController : Controller
+{
+	private readonly PostgreSQLService _pgService;
+
+	private readonly string _productsCollection = "Products";
+
+	public ShopController(PostgreSQLService pgService)
+	{
+		_pgService = pgService;
+	}
+
+	public async Task<IActionResult> Index(string? category, string? sort)
+	{
+		List<Product> source = (await _pgService.GetAllAsync<Product>(_productsCollection)).Where((Product p) => p.IsActive).ToList();
+		if (!string.IsNullOrEmpty(category) && category != "all")
+		{
+			source = source.Where((Product p) => p.Category == category).ToList();
+		}
+		source = sort switch
+		{
+			"price-low" => source.OrderBy((Product p) => p.Price).ToList(), 
+			"price-high" => source.OrderByDescending((Product p) => p.Price).ToList(), 
+			"newest" => source.OrderByDescending((Product p) => p.CreatedAt).ToList(), 
+			_ => source.OrderByDescending((Product p) => p.IsFeatured).ToList(), 
+		};
+		base.ViewBag.SelectedCategory = category ?? "all";
+		base.ViewBag.SelectedSort = sort ?? "featured";
+		base.ViewBag.Categories = source.Select((Product p) => p.Category).Distinct().ToList();
+		return View(source);
+	}
+
+	public async Task<IActionResult> Product(string id)
+	{
+		Product product = await _pgService.GetByIdAsync<Product>(_productsCollection, id);
+		if (product == null)
+		{
+			return NotFound();
+		}
+		Console.WriteLine("[SHOP] Product ID: " + id);
+		Console.WriteLine("[SHOP] Product Name: " + product.Name);
+		Console.WriteLine($"[SHOP] Colors Count: {product.Colors?.Count ?? 0}");
+		if (product.Colors != null && product.Colors.Any())
+		{
+			Console.WriteLine("[SHOP] Colors: " + string.Join(", ", product.Colors));
+		}
+		Console.WriteLine("[SHOP] Legacy Color: " + (product.Color ?? "null"));
+		_ = base.HttpContext.Session.Id;
+		if (base.HttpContext.Connection.RemoteIpAddress?.ToString() == null)
+		{
+		}
+		List<Product> source = await _pgService.GetAllAsync<Product>(_productsCollection);
+		List<ProductView> source2 = new List<ProductView>();
+		Dictionary<string, int> productViewCounts = (from v in source2
+			group v by v.ProductId).ToDictionary((IGrouping<string, ProductView> g) => g.Key, (IGrouping<string, ProductView> g) => g.Count());
+		List<Product> list = (from p in source
+			where p.IsActive && p.Id != id
+			orderby ((p.Category == product.Category) ? 100 : 0) + (productViewCounts.ContainsKey(p.Id ?? "") ? productViewCounts[p.Id ?? ""] : 0) + (p.IsFeatured ? 50 : 0) + p.UnitsSold * 2 descending
+			select p).Take(4).ToList();
+		base.ViewBag.RelatedProducts = list;
+		return View(product);
+	}
+}