feat: Add CutList.Web Blazor Server application

Add a new web-based frontend for cut list optimization using:
- Blazor Server with .NET 8
- Entity Framework Core with MSSQL LocalDB
- Full CRUD for Materials, Suppliers, Projects, and Cutting Tools
- Supplier stock length management for quick project setup
- Integration with CutList.Core for bin packing optimization
- Print-friendly HTML reports with efficiency statistics

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CutList.Web/Services/MaterialService.cs

@@ -0,0 +1,79 @@
+using CutList.Web.Data;
+using CutList.Web.Data.Entities;
+using Microsoft.EntityFrameworkCore;
+
+namespace CutList.Web.Services;
+
+public class MaterialService
+{
+    private readonly ApplicationDbContext _context;
+
+    public static readonly string[] CommonShapes =
+    {
+        "Round Tube",
+        "Square Tube",
+        "Rectangular Tube",
+        "Angle",
+        "Channel",
+        "Flat Bar",
+        "Round Bar",
+        "Square Bar",
+        "I-Beam",
+        "Pipe"
+    };
+
+    public MaterialService(ApplicationDbContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<List<Material>> GetAllAsync(bool includeInactive = false)
+    {
+        var query = _context.Materials.AsQueryable();
+        if (!includeInactive)
+        {
+            query = query.Where(m => m.IsActive);
+        }
+        return await query.OrderBy(m => m.Shape).ThenBy(m => m.Size).ToListAsync();
+    }
+
+    public async Task<Material?> GetByIdAsync(int id)
+    {
+        return await _context.Materials.FindAsync(id);
+    }
+
+    public async Task<Material> CreateAsync(Material material)
+    {
+        material.CreatedAt = DateTime.UtcNow;
+        _context.Materials.Add(material);
+        await _context.SaveChangesAsync();
+        return material;
+    }
+
+    public async Task UpdateAsync(Material material)
+    {
+        material.UpdatedAt = DateTime.UtcNow;
+        _context.Materials.Update(material);
+        await _context.SaveChangesAsync();
+    }
+
+    public async Task DeleteAsync(int id)
+    {
+        var material = await _context.Materials.FindAsync(id);
+        if (material != null)
+        {
+            material.IsActive = false;
+            await _context.SaveChangesAsync();
+        }
+    }
+
+    public async Task<bool> ExistsAsync(string shape, string size, int? excludeId = null)
+    {
+        var query = _context.Materials.Where(m => m.Shape == shape && m.Size == size && m.IsActive);
+        if (excludeId.HasValue)
+        {
+            query = query.Where(m => m.Id != excludeId.Value);
+        }
+        return await query.AnyAsync();
+    }
+}